VTV AMPLIFIER Stereo Purifi Audio 1ET400A Amplifier

(10 customer reviews)


SKU: 27564 Category:


NEW Stereo VTV Amplifier with Purifi-Audio 1ET400A modules.  


See Purifi-Audio DATASHEET here.

VTV Purifi Manual here


This is a brand new amplifier featuring:


—Multiple Input Buffer Options

The VTV Buffer option:

SPARKOS LABS SS78 & SS79 DISCRETE VOLTAGE REGULATORS provide power to the Op Amps and amplifier module.   The Sparkos Labs SS78 and SS79 Discrete Voltage Regulators bring ultra low noise and fast transient response to VTV input buffer board. Customers notice low level listening ability, far superior 3D soundstage and high frequency details.  The VTV Custom buffer accepts industry leading discrete opamps from Sparkos, Sonic Imagery and Weiss—-all in stock and available at VTV. 


—Hypex SMPS1200A400 power supply (this is the power supply used by Purifi to demo their modules)

—fully balanced design

—EMI/RFI filtered AC inlet

—Hypex NCore high-end input cable

—Heavy, custom designed aluminum case with blue LED pilot.  (LED may be dimmed or shut-off by switch)

—Silver-coated speaker output wiring with TFE jacket

—2 Year Warranty

–12.25″W x 13″D (not including speaker posts) x 4.25″H  W:14 lbs

Additional information

Input Buffer

Stock Hypex Factory Buffer, VTV Amplifier Custom Input Buffer w/o OpAmp, VTV Amplifier Custom Input Buffer w/ Sparkos Labs SS3602, VTV Amplifier Custom Input Buffer w/ PR Sparkos Labs SS2590 Pro Opamp, VTV Amplifier Custom Input Buffer w/ PR Sonic Imagery Labs 995FET Pro Opamp, VTV Amplifier Custom Input Buffer w/ PR Sonic Imagery Labs 990EnH-Ticha Pro Opamp, VTV Amplifier Custom Input Buffer w/ Sonic Imagery Labs 994EnH-Ticha Pro Opamp, VTV Amplifier Custom Input Buffer w/ PR Weiss OP2-BA Opamp

12V Trigger


Binding Post Option

Default Binding Post, WBT-0703Cu NextGen, WBT-0702.01 TopLine

10 reviews for VTV AMPLIFIER Stereo Purifi Audio 1ET400A Amplifier

  1. Greg (verified owner)

    Beautiful clean sound. Much tighter bass and clearer cymbal rings on my Vandersteen speakers than previous amp.

  2. Alan Huth

    Really great sound! Very fast service and Warren answered all my questions. He was very patient and helpful. And his prices are great. This amp is a steal. Have you seen the reviews on AudioScienceReview? You could argue it’s as good as they get without spending many multiples of this price.

  3. anonymous

    The purifi stereo amp is absolutely stunning for the price. It has depth and detail along with clean power such that the cost per watt is truly incredible. Absolutely the best 200+ wpc amp I have tried easily beating the PS Audio and Mytek high power class D offerings which cost double.

  4. Greg G. (verified owner)

    Really enjoying this 1ET400A amplifier! Very smooth, detailed sound. Effortlessly driving a pair of Totem Hawks and Focal Aria 906’s to whatever level I need. Warren is very informative and responds quickly. These amps are a great value – industry proven components and a quality chassis. I will be buying another unit in the very near future!

  5. Michael P. (verified owner)

    So, I have been in audio since 1985 and before when my dad came home from Vietnam with a Sansui 8, dual 1219, and an Akai reel to reel. Over that many years I have gone through a myriad of amps speakers and sources. I am intimately familiar with Class A and AB amps. I have been following the development of Class D for years. I decided to take the jump and look for a good amplifier. I checked out Mytek, Micromega, and Nord. All excellent Class D amps with prices to match. I came across VTV audio and Warren Coleman.
    I did what PhDs do, I researched everything about Class D and learned that Purifi provides their amp modules to the NAD Masters series, Mytek, and a number of other OEMs. I spoke with Warren several times and he explained how Class D works and the buffer modules. I was sold. No hype, no bait and switch, just honest sincere answers. I opted for the Purifi Audio 1ET400A Amplifier with the Sonic Imagery 995fet pro opamp.

    The unit arrived quickly, and I let it “burn in” for a few days and hooked it up to my Parasound P5 pre to Acoustic Energy AE 309s. My sources were my laptop playing Tidal to a Woo Audio WDS-1 non-oversamplefier DAC. I played low volume as the amp puts out 400 wpc. I eased the amp in. Immediate observation is the amp transformed the 309s. Bass output was better, deeper, precise, a revelation. Knocked me on my butt! I did not know the speaker had it in them. The tweeter was about the same in projection with much better presentation of cymbal crashes and brushes, highly detailed and the decay was much better. So, we get to the heart of music, the midrange frequencies. I heard the last knock against Class D was an issue with the midrange; the frequencies would project with a “hollowness” to them, not light, but like a shell without filling. The midrange from the VTV was detailed, succinct, and layered. The frequencies were layered, imaging was much better. Suddenly my M&Ms had filling, my pie was bulging with sweet cherry filling and detail and instrument placement in the field was greatly increased. I was in awe of what my speakers were doing.

    Next, I hooked up my brand-new Fyne Audio F501s. I played a few songs which give me a solid idea of how components do. First, 2Cellos version of Benedictus. The cellos sounded LIKE cellos, the decay in the strings was monstrous. The 501s seemed to float…er, the music seemed to float. Next, I listened to Leonard Cohen’s version of Hallelujah. Cohen’s voice in the rendition changes immensely from relaxed, soft, and clear to a strained, gravely, and deep inflection. He sounded so glorious and clear. Jeez, the F501s are one hell of a speaker! Lastly, I listened to Kinna Grannis rendition of “Can’t help falling in love with you” from Crazy Rich Asians. The kick of this song the way she sings it, the dead air that hangs out in your room. Black is what I heard and saw…BLACK, a void in space. The VTV was absolutely clean and quiet. I kept going, hearing songs for the proverbial first time as professional critics like to say. Muse’s Hysteria is an acid test for bass control and projection and the VTV nailed it, better than any amp I ever heard. Lastly, AC/DC and Thunderstruck. I was a rockin! I listen to music when my emotion drives me, it takes away my pain from many surgeries, therefore I love acoustic guitar and movie instrumentals. I simply listened immersed in the sound. Was not missing my Class AB in any fashion. I put this down to the design of the Purifi and the Sonic Imagery buffers. The VTV is neither war nor sterile, I really think it gives you the intended sound. My system is decidedly budget in the audiophile world, but, I have a very high end budget system that plays beautiful music. I am happy, happy, happy.

  6. Tuckers

    I’ve had a lot of experience with digital amplifiers for almost 2 decades. I got the stereo Purifi with the Sparkos input buffer.

    Many can provide slam, dynamics, deep bass and clear treble. This one is special in that it sounds almost completely effortless, super transparent, with a wide and deep soundstage and the widest bandwidth I’ve heard. It does all of this while being completely free of grain or electronic artifacts and completely at ease and laid back. It’s the best digital amplifier I’ve heard, and among the best tube or solid state in my experience.

    Also, Warren is excellent at customer service and support. My unit was built and shipped in a day!

  7. Paul Champlin

    First of all, I am a customer and in no way related to VTV or Warren and this is simply a submission of my experience with him as a business owner and fellow audiophile.

    I purchased a pair of bridged Hypex (NC502MP) amps and a pair of Stereo (NC502MP) amps. The stereo amps power my JBL M2s and each bridged amp powers a JBL SUB18s in my home 2 channel system.

    Upon receiving the amps, I of course auditioned them. They shipping was superb and everything arrived as described. However, after listening for an extended period, I found the Hypex modules to be slightly less transparent than my previous Crown amps. So with Warren’s counseling and encouragement, I sent the Hypex Stereo units back for a swap to the Purifi (1ET400A) modules. Although the Hypex sounded great, I find the Purifi modules to be more transparent with better sound staging. But don’t get me wrong, the Hypex units sounded really good too but IMHO they weren’t as clean as the Crown Dci 4|1250n amps I replaced.

    I wanted to write this recommendation to share how enjoyable it is to work with Warren and not feel stuck with something until I was 100% satisfied. You have to search to find vendors these days that offer this type of post sales warranty but you need search no longer. Warren’s communication, his caring and his products are simply fantastic! I would gladly buy again!

  8. Erich Boleyn (verified owner)

    After receiving the Purifi-based VTV Stereo amp, my first impression was of the build, which is very clean with nice heft. Then after hooking it up and turning on the music, it lit up high-definition recordings exquisitely like I’ve only heard in very expensive amps before. Base – Midrange – Highs, all with authority and great detail.

  9. Charles Chan (verified owner)

    I have the VTV stereo Purifi in use for about a week now and would like to share my impression.

    Sound: very neutral like ‘a piece of straight wire with gain’
    open, transparent, fast, clean and clear
    nimble, agile and powerful with good rhythm and drive
    no sugar coating or artificial detail like some tube or SS amps
    in one word “MUSIC”
    Operation: no issues
    Built: beautiful 3/4 size chassis
    quality fit and finish
    stock Hypex input buffer
    XLR-RCA adaptor
    Value: super high
    hard press to find anything comparable at this price range
    Warren: business and custom relationship
    good communication
    very patient and responsive
    no hesitation to do business again
    Complaint: not really
    a short waiting time due to ‘out of stock’
    Future: trying the VTV/Sparkos or Sonic Imagery input buffer

  10. Peter (verified owner)

    I’ve now had the Purifi stereo amp for about a month. The amp it replaced was an Icepower 1200AS-based unit. I thought it would be an improvement, but I didn’t know it would be this much of an improvement! I should point out that I don’t have a lot of experience with Class A/B amplification, so I really can’t make any comparisons in that department. However, I’ve had several amps using Class D, and each one has been better than the last. This Purifi sounds so good, that I can’t imagine how anyone could argue that Class A/B is a better topology. The sound is significantly more full and smooth than that of the Icepower unit. I haven’t tried a Hypex amp.

    I called Warren to get more information on the various input buffers he offers, and he was very helpful. In the end, I opted for the Hypex factory input buffer and I’m very satisfied with that choice.

    My speakers are Tekton Impact Monitors and I’m using a Project Pre-Box S2 as a DAC/preamp. If you’re on the fence regarding Purifi, I recommend that you give it a try.

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