Primare I35 – modular integrated amplifier

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Primare I35 Prisma modular integrated amplifier and network player front titanium
Primare I35 modular integrated amplifier black
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I35 – modular integrated amplifier

I35 is an award winning modular full size integrated amplifier featuring our UFDP 2 ampliciation technology delivering 150 watts of power per channel and balanced inputs, with the option of adding digital to analog converter and Prisma network player modules at any time.

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Primare I35 modular integrated amplifier technology inside

Technology

I35 modular integrated amplifier is the latest iteration of Primare’s now iconic integrated amplifiers and among the first to use our new UFPD 2 power system, a radical reworking of Primare’s award-winning UFPD all-analog Class-D technology.

Providing 150 watts at 8 ohms of absolutely linear UFPD 2 amplification across the entire audible bandwidth, the I35 delivers naturally fast, clean and agile sound with an unprecedented ability to bring music to life.

In addition to a pair of XLR and three RCA analog inputs, the modular design of the I35 allows for a sophisticated digital to analog converter module, DM35, as well as a Prisma network player module, SM35, to be added to the amplifier at any time for unprecedented system customization.

I35 continues a Primare tradition of delivering astonishing performance from compact and elegant integrated amplifiers for easy installation into virtually any living environment.

Primare I35 modular integrated amplifier angle titanium
Primare I35 modular integrated amplifier front black

The look and feel of Scandinavia

We believe that every aspect of our products – the way they look, the satisfying feel of the controls – contributes to the overall experience of living with Primare. As a result, Primare products exude the hallmarks of Scandinavian design – simple, elegant designs, with approachable and easy to understand functionality.
An example of this is our signature control knob, known throughout the industry for both its appearance as well as how it feels in the hand as an input is selected or volume adjusted. – or as we say lagom, not too much not too little, everything in balance, proportion, and harmony.

Modular Design and System Building

We feel it is essential to offer modularity whenever possible in order to have just the right features, both now and for the future. Modular design is featured in the I25 and I35 modular integrated amplifiers, as well as the PRE35 modular preamplifier, all of which can be updated with DAC and Prisma modules, as well as the CD35 CD player that can have the Prisma module added, either at the time of purchase or at a later date. As a result, we are able to offer a carefully considered array of models and configurations in order to allow for device selection that best fits any system need. For example, a CD35 with Prisma module installed can be paired with an I35 integrated amplifier, allowing for a separation of analog and digital stages. Or, an I35 with DAC and Prisma modules installed can be paired with a DD35 CD transport, allowing for multi-room and multi-zone playback of every input, whether analog or digital source.

Modular Design and System Building

We feel it is essential to offer modularity whenever possible in order to have just the right features, both now and for the future. Modular design is featured in the I25 and I35 modular integrated amplifiers, as well as the PRE35 modular preamplifier, all of which can be updated with DAC and Prisma modules, as well as the CD35 CD player that can have the Prisma module added, either at the time of purchase or at a later date. As a result, we are able to offer a carefully considered array of models and configurations in order to allow for device selection that best fits any system need. For example, a CD35 with Prisma module installed can be paired with an I35 integrated amplifier, allowing for a separation of analog and digital stages. Or, an I35 with DAC and Prisma modules installed can be paired with a DD35 CD transport, allowing for multi-room and multi-zone playback of every input, whether analog or digital source.

I25 and I35 Integrated Amplifier

In this video we review the features and functionality of both the I25 and I35 modular integrated amplifier platforms that may make them the perfect addition to your system.

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Primare I35 + DD35: The victory of the heart over reason

“Equipment not only worth listening to, definitely worth having as proof that music can be different. To quote Piotr Wierzbicki, “I hate Tchaikovsky and Mahler because they were too tearful, unmanly.” Primare will not spare some of your music choices, but it will give you great pleasure with other albums. definitely worth having as proof that music can be different.”


Audio Stereo, Poland, March 2020

EISA STEREO SYSTEM 2019-2020 PRIMARE CD35/I35 PRISMA

“Recipient of a previous EISA Award, Primare continues its winning ways with this I35 amplifier and CD35 Prisma CD/network player. The amplifier is a simple, but fabulous- sounding, all-analogue design that delivers plenty of power using the company’s UFPD 2 amplification. Its modular design means you can add Primare’s DAC stage, and the Prisma network/multi-room module, when required. The CD35 Prisma CD player is also fully networked, offering wired and wireless connectivity for AirPlay, Bluetooth and Spotify Connect, as well as Chromecast built-in to access thousands of streaming services. This is so much more than a simple CD player/amp system: It’s the future of hi-resolution home hi-fi.”


EISA, International, August 2019

I35 Prisma: Primare I35 Prisma

“Versatile, focused on the future of high-fidelity, the Primare i35 foreshadows what the best systems of tomorrow will be. Musical, full of life and with a disconcerting ease in the most delicate situations, it has seduced us and overcame the doubts that some may sometimes have around digital amplification. Resolutely turned towards the future and the management of networked media, it knows how to exploit the best. An undeniable success!.”


Vumetre, France, September 2019,   Download PDF

I35: HiFi+ 2020 Editor's Choice Award

“In fact, at no time and with no combination of bits and pieces I have to hand (and there are a lot of them) did it exhibit any do not like it properties or characteristics. Tonally, the I35 is rich and satisfying rather than bright and breezy, and yet it comes over as both energetic and dynamic sounding.”


HiFi+, UK, March 2020,   Download PDF

I35: HiFi+ 10th Anniversary Top 100

“The latest Primare platform is a highly modular amplifier system, but even as just an amplifier the I35 integrated is one of those products that you just love to enjoy!”


HiFi+, UK, May 2019,   Download PDF

I35 Prisma + CD35 Prisma: Primare I35 Prisma and Primare CD35 Prisma

“I35 Prisma illustrates the soul and sense of music with high tonal grip and low sibilance, nicely paints vast music landscapes and, at the same time, provides a naturally fast, transparent and agile sound. What’s more, the Swedish integrated has an inexhaustible ability to “revive” recordings. For example, on the album Keith Jarrett Trio “Somewhere” (ECM – 2009) the piano of the Steinway Grand Master, vibrating Peacock double bass strings, and DeJohnette’s delicate hi-hat drums were clearly present in the room, creating thus a perfectly balanced picture rich in detail and texture, providing the perfect insight into the emotional core of trio music.”


Stereo I Kolorowo-Underground, Poland, May 2019

I35 + CD35: CD35/I35 Best New Components

“A new series that has evolved dramatically enough to establish a new level for the brand.”


Audio Accessory, Japan, Summer 2018,   Download PDF

I35 + CD35: Notable New Products File

“In addition to the beauty of being natural sounding, depth and transparency are further enhanced… a design that harmonises Scandinavian warmth and sophistication.”


Stereo, Japan, June 2018,   Download PDF

I35 Prisma: Primare I35

“The 30 series amplifiers have a well-deserved reputation for fantastic sound, stellar build quality, and understated visual design. The new UPFD 2 power amplifier features 150 watts per channel, and like the model before it, defies pre-conceived notions of what you might think Class-D sounds like. It’s actually quite good. For the music lover wanting high performance, a modest form factor and stunning good looks, look no further.”


TONEAudio, USA, Issue 91

I35 Prisma: Reinforced Networked

“At the beginning I wrote: “He does not disappoint me.” What’s more – the elegant Swede has convinced me right down the line! First, it is a lively and well-balanced amplifier that proves sensitivity in the right places Secondly, it is an extremely complete D/A converter, capable of mastering all common digital formats, including high bit, and is well equipped, and last but not least, it is a multifunctional interface for a home music network and cooperates with the most popular streaming services.”


fairaudio, Germany, December 2018,   Download PDF

I35 Prisma: Primare I35 Prisma - Fairaudio's Favorite AWARD 2019

“Primare I35 Prisma – fairaudio’s favourite award 2019, integrated amplifier with DAC and streamer – awarded by the fairaudio editorship due to excellent sound characteristics. Exceptional clarity, a fine feel for nuance and rhythmic flair throws the Swedish integrated amplifier into balance – which also includes, in the tested version, a network player and DAC module for great connectivity. And on top of that is the chic Scandinavian design.”


Fairaudio, Germany, December 2018,   Download PDF

I35 Prisma: Primare I35 Prisma

“The top model of integrated amplifier manufactured by Primare is offered at a significantly higher price compared to that of the small I15 Prisma, winner of the EISA award, but offers a much higher power and even higher technical and sound performance. The high build quality and the sober and elegant design further increases the appeal of the amplifier.”


Audio Review, Italy, January 2019,   Download PDF

I35 Prisma + CD35 Prisma: Primare CD35/I35 Prisma

“There’s something deeply alluring about this streaming CD player/integrated amp combination, in both sound and function. An enjoyable music maker, it brings together a myriad different digital sources under one roof – so to speak – and allows easy control of them all. In turn, this makes it easier to appreciate the music without being distracted by the technology. Now there’s a thought for the future… HIGHLY COMMENDED.”


HiFi News, UK, March 2019,   Download PDF

I35 Prisma: Nordic Charisma

“It draws a crystal-clear sound through the entire spectrum, the timpani are voluminous and can resonate very freely, the strings are brilliant even in the highest registers, without sounding exaggerated. The amplifier succeeds in an excellent spatial separation and it is able to deliver dynamic peaks very energetically. With the I35 Prisma, Primare has succeeded in creating a versatile all-rounder, which, thanks to its excellent network control, is at the very top in terms of user experience.”


Audio Test, Germany, October 2018,   Download PDF

I35 Prisma: Really everything in it!

“It’s all incredibly fast and natural in its performance, lively in the best sense of the word! The quality of music playback over the network connection plays in the same league as the analog and digital inputs of the I35 Prisma. The Swedish amplifier is once again characterised by its enthusiasm, dynamism and balance.”


HiFi Stars, Germany, September 2018,   Download PDF

I35: Primare I35 integrated amplifier

“This is an amplifier that has the Devil’s Amplifier Class running cool and clear and it is extraordinarily modern in design inside and out. And yet, if you listen with your ears instead of your eyes and your prejudices, you’ll discover that this is an absolute blinder of an amplifier – possibly one of the best there is!”


HiFi+, UK, Issue 163, September 2018,   Download PDF

I35 DAC: Primare - Traditionally Strong In Integrated Amps, Comes Up With An Even Stronger Integrated Amp!

“The sound had no impurity at all… Whatever music was chosen, there was no excess or shortage in the sound of I35 DAC, and its fresh performance was impressive. It would be hard to find another amp that equals this performance at the price level of the I35 DAC. This amp is recommendable even to those audiophiles who have groundlessly negative worries about Class-D amps. In the market, there are many amps that are different inside from outside. But, through I35 DAC, I was able to confirm the reputation of Primare again.”


Audio, South Korea, May 2018,   Download PDF

I35 Prisma: Five Stars - Editor's Choice

“The sound of the I35 has something noble, special, some kind of rare consistency and analog smoothness. It’s a fantastic amp, a very good DAC and more than a decent streamer. Hot recommendation!”


HiFi Choice, Poland, August 2018

I35: Capturing the music's heart and soul

“However, it’s the ability to reveal the heart and soul of the music that is the Primare’s most endearing trait. It certainly proves that Class D has come of age, and that efficiency and pace can be delivered without sacrificing the emotive core of the music.”


Audio Video, South Africa, July 2018

I35 Prisma + CD 35 Prisma: Dream couple with qualities

“CD35 Prisma + I35 Prisma: Primare’s CD player/amp combinations are known for their technical sophistication, but the new 35-series dwarfs all its predecessors.”


Stereoplay, Germany, August 2018,   Download PDF

I35 Prisma + CD35 Prisma: Versatility at its best

“Primare is among the most consistent class-leading high-end brands of the last few decades, continuing to refine a balanced and coherent sound. These new I35 and CD35 Prisma models are still following this more evolutionary course. However, a true revolution, and certainly for this brand, is now suddenly the maximum seamless integration of almost all digital source standards currently available. Add to this the maximum sound quality, and the trouble-free and smooth operation of the app for each of these sources, and the Primare team has seen the light again!”


Music Emotion, The Netherlands, March 2018,   Download PDF

I35 DAC + CD35: Beautiful and multi-functional

“Rarely, has Primare equipment been so extensively equipped. Here is truly a great way of playing. Here you will find everyone has his perfect (including streaming) solution, tailored to your needs within each model. The CD35 is truly the best the Swedes have ever built and the I35 DAC is just awesome…”


HiFi Stars, Germany, March-May 2018,   Download PDF

I35: Integrated amplifier with class D power plant

“The Primare i35 is a special, positive piece of work… In the LowBeats listening room, this sounded wonderfully smooth, silky in the highs and with impressive force in the lowest bass.”


LowBeats, Germany, March 2018

I35 DAC: Seemingly similar, but very different

“Every type of music sounds perfect. It is great in respect to dynamics, speed, timing, resolution and providing a sense of surround sound. Dryness and “Scandinavian” coolness of tones? Nothing of the kind. This device is neutral with no evident tendencies to embellish the sound. It is also the kind of device you can listen to constantly with no signs of fatigue… Can I say anything else? Just that we will buy one for ourselves.”


Audio Video, Poland, November 2017,   Download PDF

>

Awards and Reviews

We are not the only ones convinced that Primare Products create a remarkable sound experience. Read what journalists around the world have to say.

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MSRP 3500 €
Price may vary due to differences in currency, sales and import taxes.

Included:

RemotePolarity Pen

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  • UPFD 22 x 150W 8 ohms / 2 x 300 4 ohms
  • XLR2 x stereo pair analog inputs
  • RCA3 x stereo pair analog inputs
  • RCA1 x stereo pair analog LINE output
  • RCA1 x stereo pair analog PRE output
  • C25 remoteIR system control
  • IR3.5 mm input/output
  • 12V Trigger3.5 mm output
  • RS232outboard system control port
  • Weight11 Kg
  • Dimensions430 x 106 x 420 mm (WHD)
  • Finishesblack or titanium
  • Audio Stereo, Poland, March 2020
    Primare I35 + DD35: The victory of the heart over reason

    “Equipment not only worth listening to, definitely worth having as proof that music can be different. To quote Piotr Wierzbicki, “I hate Tchaikovsky and Mahler because they were too tearful, unmanly.” Primare will not spare some of your music choices, but it will give you great pleasure with other albums. definitely worth having as proof that music can be different.”

    View full review

  • EISA, International, August 2019
    EISA STEREO SYSTEM 2019-2020 PRIMARE CD35/I35 PRISMA

    “Recipient of a previous EISA Award, Primare continues its winning ways with this I35 amplifier and CD35 Prisma CD/network player. The amplifier is a simple, but fabulous- sounding, all-analogue design that delivers plenty of power using the company’s UFPD 2 amplification. Its modular design means you can add Primare’s DAC stage, and the Prisma network/multi-room module, when required. The CD35 Prisma CD player is also fully networked, offering wired and wireless connectivity for AirPlay, Bluetooth and Spotify Connect, as well as Chromecast built-in to access thousands of streaming services. This is so much more than a simple CD player/amp system: It’s the future of hi-resolution home hi-fi.”

  • Vumetre, France, September 2019
    I35 Prisma: Primare I35 Prisma

    “Versatile, focused on the future of high-fidelity, the Primare i35 foreshadows what the best systems of tomorrow will be. Musical, full of life and with a disconcerting ease in the most delicate situations, it has seduced us and overcame the doubts that some may sometimes have around digital amplification. Resolutely turned towards the future and the management of networked media, it knows how to exploit the best. An undeniable success!.”

    View/download full review as PDF

  • HiFi+, UK, March 2020
    I35: HiFi+ 2020 Editor’s Choice Award

    “In fact, at no time and with no combination of bits and pieces I have to hand (and there are a lot of them) did it exhibit any do not like it properties or characteristics. Tonally, the I35 is rich and satisfying rather than bright and breezy, and yet it comes over as both energetic and dynamic sounding.”

    View/download full review as PDF

  • HiFi+, UK, May 2019
    I35: HiFi+ 10th Anniversary Top 100

    “The latest Primare platform is a highly modular amplifier system, but even as just an amplifier the I35 integrated is one of those products that you just love to enjoy!”

    View/download full review as PDF

  • Stereo I Kolorowo-Underground, Poland, May 2019
    I35 Prisma + CD35 Prisma: Primare I35 Prisma and Primare CD35 Prisma

    “I35 Prisma illustrates the soul and sense of music with high tonal grip and low sibilance, nicely paints vast music landscapes and, at the same time, provides a naturally fast, transparent and agile sound. What’s more, the Swedish integrated has an inexhaustible ability to “revive” recordings. For example, on the album Keith Jarrett Trio “Somewhere” (ECM – 2009) the piano of the Steinway Grand Master, vibrating Peacock double bass strings, and DeJohnette’s delicate hi-hat drums were clearly present in the room, creating thus a perfectly balanced picture rich in detail and texture, providing the perfect insight into the emotional core of trio music.”

    View full review

  • Audio Accessory, Japan, Summer 2018
    I35 + CD35: CD35/I35 Best New Components

    “A new series that has evolved dramatically enough to establish a new level for the brand.”

    View/download full review as PDF

  • Stereo, Japan, June 2018
    I35 + CD35: Notable New Products File

    “In addition to the beauty of being natural sounding, depth and transparency are further enhanced… a design that harmonises Scandinavian warmth and sophistication.”

    View/download full review as PDF

  • TONEAudio, USA, Issue 91
    I35 Prisma: Primare I35

    “The 30 series amplifiers have a well-deserved reputation for fantastic sound, stellar build quality, and understated visual design. The new UPFD 2 power amplifier features 150 watts per channel, and like the model before it, defies pre-conceived notions of what you might think Class-D sounds like. It’s actually quite good. For the music lover wanting high performance, a modest form factor and stunning good looks, look no further.”

    View full review

  • fairaudio, Germany, December 2018
    I35 Prisma: Reinforced Networked

    “At the beginning I wrote: “He does not disappoint me.” What’s more – the elegant Swede has convinced me right down the line! First, it is a lively and well-balanced amplifier that proves sensitivity in the right places Secondly, it is an extremely complete D/A converter, capable of mastering all common digital formats, including high bit, and is well equipped, and last but not least, it is a multifunctional interface for a home music network and cooperates with the most popular streaming services.”

    View/download full review as PDF

  • Fairaudio, Germany, December 2018
    I35 Prisma: Primare I35 Prisma – Fairaudio’s Favorite AWARD 2019

    “Primare I35 Prisma – fairaudio’s favourite award 2019, integrated amplifier with DAC and streamer – awarded by the fairaudio editorship due to excellent sound characteristics. Exceptional clarity, a fine feel for nuance and rhythmic flair throws the Swedish integrated amplifier into balance – which also includes, in the tested version, a network player and DAC module for great connectivity. And on top of that is the chic Scandinavian design.”

    View/download full review as PDF

  • Audio Review, Italy, January 2019
    I35 Prisma: Primare I35 Prisma

    “The top model of integrated amplifier manufactured by Primare is offered at a significantly higher price compared to that of the small I15 Prisma, winner of the EISA award, but offers a much higher power and even higher technical and sound performance. The high build quality and the sober and elegant design further increases the appeal of the amplifier.”

    View/download full review as PDF

  • HiFi News, UK, March 2019
    I35 Prisma + CD35 Prisma: Primare CD35/I35 Prisma

    “There’s something deeply alluring about this streaming CD player/integrated amp combination, in both sound and function. An enjoyable music maker, it brings together a myriad different digital sources under one roof – so to speak – and allows easy control of them all. In turn, this makes it easier to appreciate the music without being distracted by the technology. Now there’s a thought for the future… HIGHLY COMMENDED.”

    View/download full review as PDF

  • Audio Test, Germany, October 2018
    I35 Prisma: Nordic Charisma

    “It draws a crystal-clear sound through the entire spectrum, the timpani are voluminous and can resonate very freely, the strings are brilliant even in the highest registers, without sounding exaggerated. The amplifier succeeds in an excellent spatial separation and it is able to deliver dynamic peaks very energetically. With the I35 Prisma, Primare has succeeded in creating a versatile all-rounder, which, thanks to its excellent network control, is at the very top in terms of user experience.”

    View/download full review as PDF

  • HiFi Stars, Germany, September 2018
    I35 Prisma: Really everything in it!

    “It’s all incredibly fast and natural in its performance, lively in the best sense of the word! The quality of music playback over the network connection plays in the same league as the analog and digital inputs of the I35 Prisma. The Swedish amplifier is once again characterised by its enthusiasm, dynamism and balance.”

    View/download full review as PDF

  • HiFi+, UK, Issue 163, September 2018
    I35: Primare I35 integrated amplifier

    “This is an amplifier that has the Devil’s Amplifier Class running cool and clear and it is extraordinarily modern in design inside and out. And yet, if you listen with your ears instead of your eyes and your prejudices, you’ll discover that this is an absolute blinder of an amplifier – possibly one of the best there is!”

    View/download full review as PDF

  • Audio, South Korea, May 2018
    I35 DAC: Primare – Traditionally Strong In Integrated Amps, Comes Up With An Even Stronger Integrated Amp!

    “The sound had no impurity at all… Whatever music was chosen, there was no excess or shortage in the sound of I35 DAC, and its fresh performance was impressive. It would be hard to find another amp that equals this performance at the price level of the I35 DAC. This amp is recommendable even to those audiophiles who have groundlessly negative worries about Class-D amps. In the market, there are many amps that are different inside from outside. But, through I35 DAC, I was able to confirm the reputation of Primare again.”

    View/download full review as PDF

  • HiFi Choice, Poland, August 2018
    I35 Prisma: Five Stars – Editor’s Choice

    “The sound of the I35 has something noble, special, some kind of rare consistency and analog smoothness. It’s a fantastic amp, a very good DAC and more than a decent streamer. Hot recommendation!”

    View full review

  • Audio Video, South Africa, July 2018
    I35: Capturing the music’s heart and soul

    “However, it’s the ability to reveal the heart and soul of the music that is the Primare’s most endearing trait. It certainly proves that Class D has come of age, and that efficiency and pace can be delivered without sacrificing the emotive core of the music.”

    View full review

  • Stereoplay, Germany, August 2018
    I35 Prisma + CD 35 Prisma: Dream couple with qualities

    “CD35 Prisma + I35 Prisma: Primare’s CD player/amp combinations are known for their technical sophistication, but the new 35-series dwarfs all its predecessors.”

    View/download full review as PDF

  • Music Emotion, The Netherlands, March 2018
    I35 Prisma + CD35 Prisma: Versatility at its best

    “Primare is among the most consistent class-leading high-end brands of the last few decades, continuing to refine a balanced and coherent sound. These new I35 and CD35 Prisma models are still following this more evolutionary course. However, a true revolution, and certainly for this brand, is now suddenly the maximum seamless integration of almost all digital source standards currently available. Add to this the maximum sound quality, and the trouble-free and smooth operation of the app for each of these sources, and the Primare team has seen the light again!”

    View/download full review as PDF

  • HiFi Stars, Germany, March-May 2018
    I35 DAC + CD35: Beautiful and multi-functional

    “Rarely, has Primare equipment been so extensively equipped. Here is truly a great way of playing. Here you will find everyone has his perfect (including streaming) solution, tailored to your needs within each model. The CD35 is truly the best the Swedes have ever built and the I35 DAC is just awesome…”

    View/download full review as PDF

  • LowBeats, Germany, March 2018
    I35: Integrated amplifier with class D power plant

    “The Primare i35 is a special, positive piece of work… In the LowBeats listening room, this sounded wonderfully smooth, silky in the highs and with impressive force in the lowest bass.”

    View full review

  • Audio Video, Poland, November 2017
    I35 DAC: Seemingly similar, but very different

    “Every type of music sounds perfect. It is great in respect to dynamics, speed, timing, resolution and providing a sense of surround sound. Dryness and “Scandinavian” coolness of tones? Nothing of the kind. This device is neutral with no evident tendencies to embellish the sound. It is also the kind of device you can listen to constantly with no signs of fatigue… Can I say anything else? Just that we will buy one for ourselves.”

    View/download full review as PDF

Primare Bent Nielsen, Chief Engineer at Primare since 1986

Bent Nielsen

Chief engineer at Primare since 1986

Engineers notes:
I35 – modular integrated amplifier

The I35 Prisma is an integrated digital and analog music system control center and amplifier – capable of providing exemplary performance whether the source is analog or digital, stored or streamed, wired or wireless.

The latest iteration of Primare’s now iconic 30 Series integrated amplifiers, the I35 Prisma is the first to use the new UFPD 2 power system, a radical reworking of Primare’s award-winning UFPD all-analog Class-D technology. Providing 150 watts at 8 ohms of absolutely linear amplification across the entire audible bandwidth, the I35 Prisma delivers naturally fast, clean and agile sound with an unprecedented ability to bring music to life. In addition to balanced analog inputs, the I35 Prisma includes a full-featured DAC stage, as well as Prisma connectivity and control technology.

Show more

Contents

  • Design Philosophy
  • Input Technology
  • UFPD 2 Amplifier Technology
  • Digital to Analog Conversion Technology
  • Prisma Connectivity and Control Technology
  • Optional Configurations
  • System Building
  • Specifications

Design philosophy

All of Primare designs are a result of our Practical Design Approach, resulting in a focus on two fundamental design elements:

  1. Thoroughly implemented power supply designs – so that all elements of any design to operate effortlessly at their fullest effectiveness. Every product and sub-circuit demands unique power supply solutions – a more conventional linear supply or advanced switch mode main supply may work best dependent upon the application, and carefully crafted individual discrete power supplies are strategically inserted into the circuit to deliver power exactly where and how much is needed.
  2. Artfully crafted ultra-short signal paths – so that each individual component and sub circuit operates sympathetically to achieve a cohesive whole. Elegant and simple electrical designs are used in even the most complex product, utilizing ultra-short signal paths with all gain in one device whenever possible.  Ultimately, this results in fewer, higher quality parts for a reduction in associated distortions and an increase in overall electrical efficiency.

To that end, basic technologies have been selected to realize those benefits:

  • 2 and 4-layer double-sided circuit board construction allows for the most direct and efficient layout of circuit components not only for the shortest signal path, but also to more easily achieve a sympathetic layout of circuit and sub-circuit components for best performance.
  • Surface mount components are used whenever possible as this allows for direct connection of the circuit device or component to the circuit board trace with the solder being used solely to mechanically hold the part in place. The elimination of the small metal lead or wire at each connection point in a more conventional large scale circuit device or component cumulatively shortens the signal path. Additionally, conventional large scale components demand through hole or “eyelet” construction, limiting direct contact of the component’s lead to the circuit board trace and resulting in the solder providing electrical connection as well as mechanical connection for the device. Neither solder nor the metal used in the leads of most large scale devices provide the best signal transmission, therefore limiting potential performance of even the best designed circuits.
  • Class D amplifier technology has many inherent advantages, one of which is the ability to locate the heat sink directly on the circuit board within the amplification module, considerably reducing circuit path length and allowing for the power output devices to be directly connected to the speaker output connection posts.

Amplifier Technology

Input section

Carefully crafted input circuitry utilizes relays for input switching providing better isolation and sound than found in more conventional CMOS (Complementary metal–oxide–semiconductor) switches.

Control

  • Improved 2 x 4 channel balanced mode volume control IC selected for optimal channel balance and low listening level performance.
  • The latest generation OLED display technology used in the I35 was originally developed for the automobile industry to ensure long life in even the most hostile environments, and improved readability due to greater consistency of color value and brightness level.
  • Auto sense input circuitry automatically selects any input source as it is activated.
  • C25 IR remote control with completely new, proprietary control codes for faster response and reduced interference.
  • RS-232 connection, in addition to being used for component quality control testing of each and every product, allows for the use of whole home system control technologies such as Control 4.
  • 12V triggers for coordinated system turn on and turn off.

Control Configuration

Either from the front panel or C25 IR remote control, the I35 Prisma can be configured to best suit system needs:

  • Input settings
    • Status – enable or disable the input to make it visible or not, so only those you use are visible for easier input selection
    • Alias – edit the alias, or rename, each input to give it a specific name, for easier identification
    • Auto-sense – enable auto-sense to determine which inputs will be automatically selected when a signal is detected
    • Volume – choose between variable or fixed volume, allowing any input to pass through the preamp stage to connect directly to the amplifier for use of within a home theater system configuration.

Or fixed gain setting allows for any input to be use in a theater or surround sound pass through configuration

    • Input Gain – adjusting the input gain so that all inputs to be at the same relative volume level, and as result the ability to raise or lower overall gain for preferred output volume setting
  • Audio Settings
    • Balance – to adjust the output balance between the left and right speaker
    • Startup volume – sets the volume level at a predetermined level upon turn on from standby or at the level when last switched off.
    • Maximum volume – sets the maximum volume
    • Mute volume – sets the output level when muted, from 0 to any preferred setting
    • Digital output – to select between 48kHz and 96kHz settings for the digital output from analog inputs, as some devices in your system might not be compatible with the default 96kHz output.
  • General
    • Show inputs – choose between showing all enabled inputs or only those with signal
    • Front panel – to lock the front panel to disable all front panel controls
    • Auto dim – select the amount of time at which the front panel display will dim
    • LED brightness – set the level of display brightness for three specified dim levels
    • Standby settings:
      • Auto-standby – sets the amount of time without user interface action or signal from last selected source before the device automatically goes into standby
      • Wake up – enables auto-sense to wake up the device from standby upon detecting an input signal source
    • Factory reset – allows for the device to be returned to factory default settings

Amplifier Section

The amplifier section utilizes the new proprietary UFPD 2 power technology, providing immediate and sustained high power output with very low distortion, instantaneous rise time and absolutely linear amplification across the entire bandwidth resulting in a naturally fast, clean and agile sound over an ultra-wide frequency range and with exceptional headroom.

In UFPD 2 a new error amplifier circuit has been developed that does not affect the gain versus frequency curve and thereby the bandwidth does not have to be limited. This gives very low phase shift in the audio band and a larger closed loop bandwidth. Using a custom made output coil in the 2nd order filter error amplifier with the same loop gain results in feedback control across the entire audio band. It has been optimized to keep the loop gain constant in the audio band, which means it is actually lower at low frequencies than with UFPD but much higher at high frequencies. The result is even more linear amplification, with lower noise with UFPD 2, providing absolute “black” backgrounds from which music has a more holographic, three-dimensional, life-like character and richness.

Power Supply Section

Given the speed with which the UFPD 2 amplifier module is able to deliver power to the speaker a switch mode power supply was the only choice in that it allows for rapidly varying demand, providing much more stable voltage, with ancillary capacitive storage to meet peak transient burst requirements.

This newly developed Active Power-Factor Correction (APFC) converter is as much as 5% more efficient than past supplies, and comprises dual PFC converters 180 degrees out of phase from each other. AFPC is used to avoid input current harmonics, thereby minimizing interference with other devices being powered from the same source. This reduces the total current ripple and improves EMC (Electromotive Compatibility), while current ripple at the output of the PFC converter is also reduced, which decreases stress within the circuit for prolonged life. Additionally, the supply operates in what is called “transition mode”, minimizing switching losses and improving overall efficiency in delivering power to the UFPD 2 amplification module.

For more details see:

  • “UFPD 2 Amplification Technology Design Brief”
  • “Performance Benefits of UFPD Amplification”

Digital to Analog Conversion (DAC) Technology

In order to allow for playback of virtually any digital source with absolute accuracy and musicality, the I35 Prisma’s refined DAC stage recreates high-resolution sound that is as close as possible to the original source.

At the heart of this DAC stage is the new flagship of AKM’s Verita series, the AK4497EQ chipset, a premium 32-bit stereo DAC, incorporating the companies VELVET SOUNDTM technology, and capable of achieving -128dB (stereo) S/N and -116dB THD+N, while supporting up to 768kHz PCM and 22.4MHz DSD. This ability to handle higher resolution file formats will allow for the potential of future software upgrades.

The AK4497EQ integrates a newly developed switched capacitor filter “OSR Doubler” that greatly reduces sound degradation from noise shaping, achieving a flat noise floor up to 200kHz. An innovative design technique utilizing a symmetrical layout for the left and right channels prevents signal quality deterioration, and a 32-bit digital operation block provides full 32-bit processing.

Inputs include, four optical (Toslink), three RCA (SPDF), and one USB-B digital. The USB-B input allows playback of files up to PCM 768kHz/32bit and DSD256/11.2MHz

One RCA digital output is included, allowing for pass through of digital signals and the option to select 48 or 96 digital output from analog sources.

Connectivity and Control Technology Prisma

Prisma provides multi-room/multi-zone connectivity and control for playback of stored and streamed media, wired or wireless, all managed from any mobile device through a dedicated system control app. In addition to Bluetooth®, AirPlay, and Spotify Connect, Prisma features Chromecast built-in, a unique streaming portal allowing effortless direct connection to hundreds of streaming applications for the best possible performance and user experience.

Prisma App, in addition to the configuration settings control listed above, provides:

  • Switching of all inputs, analog and digital, stored or streamed
  • Volume control and input sensitivity adjustment
  • Customization of input options, including renaming
  • Multi-room multi-zone control between other Prisma enabled devices
  • Playlist and queue functionality from connected LAN storage devices
  • Wake up on cast signal

Connectivity

  • Digital – USB-A
    • Sample rates up to PCM 24/192kHz and DSD 128/5.6MHz
    • File formats: WAV, LPCM, AIFF, FLAC, ALAC, MP3, MP4 (AAC), WMA, OGG, DSD
  • Network
  • Wired/LAN Ethernet connection for wired network system connection
  • Wireless/WLAN – dual band wireless technology (WLAN IEEE 802.11 a/b/g/n and 802.11ac compliant)
  • Streaming
  • Bluetooth – connects Apple, Android, and Windows devices directly for playback of either streamed or stored content from the associated device with lossy compression. Given the wide availability of this technology and lower resolution capabilities, Bluetooth is an easy way to stream content for informal listening.
  • AirPlay – connects Apple devices over the WiFi network for playback of either streamed or stored content from the associated device with lossless compression. As a result, AirPlay has the capability of playing over greater distances than Bluetooth, and as the Apple Lossless Audio Codec is used to allow streaming quality up to CD quality (44.1kHz), is appropriate for more critical listening.
  • Spotify Connect – connects any device with the Spotify application over the WiFi network directly to that service, and allows for playback at the highest level offered by the required Premium service (up to 320 kbps).
  • Chromecast built-in – offering the greatest level of connectivity and control options:
    • The Chromecast built-in associated Google Home application connects the Prisma device to your WiFi network for casting hundreds of enabled music streaming services.
    • Because it provides a direct connection between the I35 Prisma and the preferred music service through the network, playback quality is limited only by the quality of resolution provided by that service, meaning the possibility of higher resolution playback from services like TIDAL HiFi and Qobuz (up to 24-bit/96kHz).
    • More than one device can be connected at a time, content can be cast to any Chromecast built-in device on the network, and control of all functions can be accomplished from anywhere within the network.
    • Automatic Prisma firmware updating through Google Home application.
    • Voice control though the Google Home speaker and Google Assistant is anticipated as that system becomes readily available.

For additional details on Prisma see “Design Brief – Prisma”

Note: features and specifications are preliminary and subject to change.

System Building

The optional configurations offered are examples of Primare’s practical design approach extending not only to the individual components we make, but also to the system building options designed into each model. For example, if putting together a full-featured digital and analog system based on the I35 integrated amplifier platform, a number of pairing options. Two possible combinations are detailed below:

I35 + CD35 Prisma or CD35

Pairing an I35 Prisma and CD35 Prisma would mean redundant circuitry, with their similar DAC and Prisma components. This is one of the reasons that we offer the I35 analog only option. Not only does pairing the of I35 and CD35 Prisma avoid obvious redundancies between the two components and reduces overall system costs, but it also offers certain advantages for improved performance.

In part due to the industry standard ESS Sabre chipset employed in its DAC stage, the CD35 Prisma is able to provide subtly superior performance over the AKM chipset based DAC stage in either the I35 Prisma or I35 DAC. Additionally, the separation of the all-analog amplification circuitry in the I35 from the digital circuitry in the CD35 Prisma isolates those sections for lower noise floor and improved power supply delivery.

Note: the lack of Prisma technology in the I35 does mean that control of that unit through the Prisma app and multi-room/multi-zone functionality for I35 input sources is not available.

I35 Prisma or I35 DAC + DD35

For those who wish to have a single control and connectivity center, the I35 Prisma can be paired with the soon to be released DD35 CD disc drive. The DD35 is a transport only device, with digital outputs and no DAC stage, and is perfect to provide the best digital signal for conversion by the I35 Prisma or I35 DAC.

I35 Prisma Integrated Amplifier Specifications

Amplification

Amplifier module: Primare UFPD 2

Power supply: Primare APFC

Output Power: 2x 150W at 8Ω; 2x 300W at 4Ω

Analogue Inputs:

  • 2 pair XLR (L & R)
  • 3 pair RCA (L & R)

Input Impedance: RCA 15kΩ; XLR 30kΩ

Line Output: 1 pair RCA (L & R)

Pre Out: 1 pair RCA (L & R)

Output Impedance: Line and Pre 100Ω

Frequency Response: 20Hz – 20kHz -0.2dB

THD + N: < 0.01%, 20Hz – 20kHz, 10W at 8Ω

Signal to Noise: >100 dB

Gain:

  • Pre Out: RCA in 16.5dB; XLR in 10.5dB
  • Speaker Out: RCA in 42.5dB; XLR in 36.5dB

Digital to Analog Conversion

Chip set: AKM AK4497

Inputs

  • 4 x TOSLINK (optical) up to192kHz/24 bit
  • 2 x RCA up to 192kHz/24 bit
  • 1 x USB-B up to 768kHz/32 bit; DSD 256/11.2MHz

Digital Output: 1 x RCA

  • Analog input = selectable 48kHz or 96kHz out
  • Digital input = pass through

Frequency response:

  • 44.1kHz 20Hz – 20kHz 44,1 +0,1 / -0,65
  • 96/192kHz 20Hz-20kHz +0,1/ -0,2

Prisma

Audio formats: WAVE, AIFF, FLAC, ALAC, MP3, MP4 (AAC), WMA, OGG, DSD

Inputs:

  • USB-A: up to 192 kHz/24 bit; DSD 256/11.2MHz
  • Airplay®
  • Bluetooth®
  • Chromecast built-in®
  • Spotify Connect®
  • UPnP/DLNA
  • LAN:
  • Up to 192 kHz/24 bit; DSD 128/5.6MHz
                  • Data transfer rate: 10/100Mbit
  • WLAN:
  • Up to 192 kHz/24 bit; DSD 128/5.6MHz
  • IEE 802.11 a/b/g/n/ac compliant; 2.4/5GHz; b, g, n mode
  • Data transfer rate: maximum of physical layer rate of 390 Mbps

Frequency Response:

  • Analog: 20Hz – 20kHz -0,5dB
  • Digital:
    • 44.1kHz 20Hz – 20kHz +0.1/-0.6dB
    • 96kHz 20Hz – 20kHz +0.1 /-0.2dB
    • 192kHz 20Hz – 20kHz +/- 0.1dB

General

Control

  • C25 system remote control
  • RS232
  • IR in/out
  • Trigger out

Power Consumption:

  • Standby: <0.5W ECO Mode; <3.5W Wake Up Mode
  • Operate: <42W

Dimensions (wxdxh):

  • 430 x 420 x106 mm with knobs and connectors
  • 430 x 382 x106 mm without knobs and connectors

Weight: 11 kg

Color Options: Black and Titanium

Note: features and specifications are preliminary and subject to change.