VALVET A4 Mk.II mono blocks


$7,890.00 USD 

VALVET blocks A4 Mk.II mono-blocks

The A4 Mk.II are the successor and new improved and latest version of the renowned A3.5 mono-blocks!

The Mk.II version of these amazing mono-blocks has been much improved. 33% stronger transformers (now 2 times 400 watts), new audiophile resistors and silver wiring with real cotton isolation elevate these close to the performance of Valvet's top-line mono-blocks, the A4e... and all this while still maintaining Valvet's small footprints.

 Power and competence
The VALVET A4 Mk.II monoblocks are the successors of the award-winning VALVET A3.5 monoblocks and currently the most potent power amplifiers in our line-up. Again, long term satisfaction, real value and reliability are key values. Those who own these power amplifiers can put any worries about amplification to one side for a very long time! What the A4 Mk.II conveys in terms of musical information is simply breathtaking! We encourage you to compare them to the top brands and then decide which delivery gives you the greater pleasure.

 Performance and dynamic
The A4 Mk.II amplifiers are extremely quick, controlled and powerful. They don’t force themselves onto the music, but rather support its flow and the listener’s involvement. The A4 Mk.II monoblocks have an output of more than 90 watts per channel into 4 ohms (55 watts into 8 ohms). This is a very conservative measurement, as with all VALVET amplifiers. We believe that you will not feel the need for more power for a long time.

The A4 Mk.II power amplifiers, in common with all other VALVET amplifiers, have an extremely stable power supply which gives them an excellent ability to deliver current, thus keeping even the most difficult speakers on the market on a tight leash. The A4 Mk.II monoblocks operate in Push-Pull pure Class A mode with just a single pair of transistors in the output stage. We believe that the common practice to employ several transistors in parallel required to produce a higher output is detrimental to the sound quality.

A 400 VA toroidal transformer, 8 ultrafast 15A rectifier diodes plus more than 132.000 µF of filter capacitors guarantee excellent performance. No capacitor in the cotton insulated, pure silver wired signal path. "JUST PURE MUSIC!"

The sound is dynamic, neutral, balanced, very musical, powerful with blackness and control in the bass, simply right. 'The power and the glory' - indeed!


  • connection: WBT NextGen & Neutrik XLR sockets, input impedance 50 KOhm, 1 pair WBT NextGen binding posts for speaker connection (bi-wire optional), IEC mains socket
  • amplification: 55 watts into 8 Ohm, 90 watts into 4 Ohm, Class A
  • transformer: 400VA each mono-block
  • filtering: 132,000 µF filtering each mono-block
    dimensions: 230 x 110 x 310 mm (9 x 4.4 x 12.2 inches) WxHxD each mono-block
  • case: Aluminum, black powder coated, heat sink black anodized
  • front: 12.5mm Aluminum, black powder coated or silver brushed
  • sound: dynamic, neutral, balanced, very musical, powerful with blackness and control in the bass, simply right. 'The power and the glory' - indeed!
  • optional: Chrome fronts $450.00
  • optional: Black/Red with carbon top $400 (CB Version)



Marc of The Audiophile Weekend Warrior writes (February 2020):
"...there’s a purity and density of tone, a freedom from electronic haze and grain, a fluidity of expression that’s subtle in absolute terms but significant in visceral ones. The Valvet A4 Mk.II is delightfully expressive, sweet and pure, with an honest and unforced way of capturing the warmth and beauty of a performance..."
to read the entire review

Winner of a Fidelity Award 2018 (A4):Fidelity Award 2018
"...sweet, small and feisty – 55 Class-A watts per channel that sound like much more and can also  master bigger challenges with bravura..."


Patrick Dillon of HiFi Zine (May 2017) concluded (A4):
"...and this is how I end up feeling about the Valvets. They are so finely balanced and cohesive that you might at first wonder about their unique qualities. They won’t immediately catch your ears with detail, but those details are there to be heard; they won’t blow you away with unparalleled bass depth, yet the bass is full and realistic; they can deliver space and decay while slamming you with dynamics when required. When you hear them over an extended period of time on music you love, you come to realize there is something quite special about these amplifiers. In their understated manner, small footprint and relatively low power specification, the Valvet A4s are capable of delivering musical reproduction that is as good as I can remember hearing. There was never a recording I played where I felt I was missing something or that the amps were not delivering the goods, and that’s across multiple genres and ages of music. Class A all the way..." 
CLICK HERE to read the entire review

Key Kim reviewed the A3.5 and soulshine for The Stereo Times December 2009
"...the new Valvet Block A3.5s are incredible sounding amps. It was hard to believe these were only 50 watts per channel. They drove my reference Conspiracy loudspeakers with great authority and power. The Valvets possess purity and remarkable transparency that allows them to provide an amazing musical experience. At $5.590.00, it’s a bargain! ...this preamp (soulshine) had a natural purity and open airy sound which brought me closer to music. Stay tuned for a full review" 

Review of A3.5/soulshine in the German magazine "Image HiFi" 02/2010 by Roland Kraft:
"...once they’ve warmed up to operating temperature, these seemingly insignificant audiophile amps fascinate the listener with stupendous transparence. In addition, a spacious sound stage with an impressive breadth immediately captivates the listener... the Valvet amps are agile, never strained, and always light-footed. They constantly create a fresh, clear - but never cold - breath of air, and at the same time easily concentrates on the essence that can hardly be described. The tubes and transistors complement each other perfectly, making an lasting impression that can hardly be equaled in this price class..."
 - read the entire  review (in German)

Review of A3.5/soulshine on "Positive Feedback Online" Issue 48 03/2010 by Robert Learner:
"...smooth, dynamic, lively, and organic. Tonal purity suggests straight-wire gain with a dash of inner glow. Soundstaging is precise in localization... Transients have snap and life, and decays are full-blooded, something I've come to associate with Class A electronics versus some other designs. There is none of the sterility I've heard with some other solid-state amps... haven't heard better for the money and certainly worse for more. These components have some magic, something past competence or even excellence and into the illusion of 'real'. You can find components that do this or that better in the price range, but none I've spent time with are as addictive. They get the essence of the music... The sound quality is not only that good, it's that true—park them on your rack for the next ten years and find other things to worry about."
 - read the entire  review

The review "Giant Killers" for A3.5/soulshine on "The StereoTimes" 06/2010 by Key Kim:
"...from the very first notes on the very first album, it was obvious that the Valvet combo was something special. In our age of hyper-priced imported components, it’s not just good sounding (even at just over $11k) The Valvet components are the real deal regardless of price.... They are giant-killers in that they provide the ultimate musical bliss without breaking one’s bank account. If you're looking for that really great sounding system that isn't stratospherically priced, then look no further than Valvet..."
 - read the entire  review

Review of P2c/A3.5 in the UK magazine "HiFi+ Nr.76" 10/2010 by Jason Kennedy:
 "...the P2c is a well built preamplifier that offers an awful lot of sound quality for the money, you will be hard pressed to equal it sonically with a better looking product. The A3.5 is by contrast very nicely cased and extremely engaging with enough grip to keep you rocking in the context of a relaxed and revealing demeanour. And I thought I didn’t like the sound of silver!"
 - read the entire  review

Review of L2, E1r and A3.5 MkII on the German web-zine "HIFI Statement" 07/2013 Amre Ibrahim:
"...we cannot thank Mr. Cornils enough for enriching the world with high-end components such as the Valvet E1R, A3.5 MKII and L2. At a time when many amplifiers are beyond the financial reach of the average consumer’s purse, he provides an impressive counterpoint with unusual approaches to development and robust Made-in-Germany fabrication: absolutely consistent, highly musical audio components at an affordable price. More, please, Mr. Cornils!" 
 - read the entire review 
 - here for original German

"...after over a week of listening and comparing, I can honestly state that Valvet equipment has the performance to beat. I don’t know if I had mentioned to you that I own a Pass Labs XA30.5 stereo amplifier, but that is what I compare amplifiers against, and I can confidently state that Valvet has the better amplifier...I compared back and forth between the Pass Labs unit and the Valvet A3.5 mono-blocks using the same sources, same preamp (my Valvet), even the same cabling, and time after time I selected the Valvets as having the better sound, staging, bass attack, and highs...Couldn’t be happier!"

"...this evening I sat down to read the July/August 2011 edition of The Absolute Sound Magazine, and thought I'd put on some pleasant but mostly background music as I read. 'The most relaxing Jazz Piano music in the Universe' by Denon. Just background stuff for when we have people over for dinner, etc. OK, disc two "Lover Man" with Sonny Stitt and Cedar Willams. The overall presence and (fill in every over the top audio review you have ever read) and the Vibraphone bloom and decay, etc. etc. made me put my beloved Absolute Sound down to e-mail you with my wholehearted appreciation for your having this, in my experience, the best audio value for power amps (with appropriate front end, cables and speakers) in the universe--tubes or solid state..." 

 "...the A3.5's continue to impress me with their ability to really convey the music and the performance on a wide range of music, vocals, and instruments. Truly amazing! I am very satisfied with this purchase and everything stated about them is absolutely spot on without any hype..." 

 "...timbre, nuances, speed (bloom and decay), soundstage depth and width, dynamics and imaging were all spot on without being forced, etched or "driven" in the HiFi sense. I was somewhat skeptical that the relatively low rated wattage (A3.5 mono bocks) output would really do the job, but once installed, the volume setting on my preamp was very close if not slightly less that previously using tube amps rated at least twice as high and solid state amps rated four times as high in output wattage... Vocals (male and female) were rendered with more subtle shadings and were startling in the "you are there sense", bass is now much more "fleshed out" in all its potential in timbre and dynamics, snare drums, brushes, cymbals and top hats are extremely more involving and piano is rendered in a manner that I thought I could never reproduce in comparison to the real thing.... In short, I have moved from listening to music to experiencing the performance. An amazing feat of engineering from an individual who has not only the skills and intellect but the passion for music and this wonderful hobby/obsession called audio. Thanks again for making this wonderful amplifier available in the United States."

 "...I was very impressed (awesome). Compared to some way more expensive gear, the Valvets (soulshine & A3.5) held their own in an excellent way. And for what they cost, I have to scratch my head and wonder..."


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