Monoblock VTV Amplifier with Purifi 1ET400A module with Input Buffer Options

(3 customer reviews)


SKU: 27430 Category:



Monoblock VTV Amplifier with Purifi 1ET400A module and VTV amplifier custom input buffer.  Selected options for the modular plug-in discrete opamps from Sparkos, Sonic Imagery and Weiss.

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Purifi-Audio 1ET400A Datasheet here

VTV Purifi Manual here

This is a brand new amplifier featuring:
—Hypex SMPS1200A400 power supply
—fully balanced design
—EMI/RFI filtered AC inlet
—MOGAMI Input wiring standard
—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
—Custom input buffer offers substantial improvement over stock OEM module combined with ease changing opamps to suit listening taste

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. 
—Unit is shipped with 7db buffer gain….factory 14db gain can be set with jumper
–8″W x 11″D (not including speaker posts) x 3.125″H    8.7lbs 

Additional information

Input Buffer Option

Hypex Factory Buffer with Fixed Monolithic Opamp, 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

No Trigger (Default), 12V Trigger Option

3 reviews for Monoblock VTV Amplifier with Purifi 1ET400A module with Input Buffer Options

  1. Santosh

    After reading comments before mine, I was tempted to order Purify 1ET400A based amplifier. First I thought of buying a Stereo amplifier. But finally settled for monoblocks each with its own power supply. I requested Warren for few upgrades like Cardas binding posts and Neotech UP OCC copper cables for Connecting to Binding posts, and he was more than willing to accommodate all my requests. He was extremely cooperative and accepted all my requests even though the project got delayed a bit due to these changes.
    Finally the units were shipped to Bangkok, Thailand where I live.
    I was desperately looking forward to listen to these Amplifiers as I had read a lot on web pages. The packing was extremely good and safe and well protected.
    But to my bad luck one of the Amplifier failed as there was no music coming out even thought flint LED light was ON.
    I immediately contacted Warren. He response came without delay. He asked me to open the case and do a few check with Ohms/ Multimeter. After this he concluded that SMPS was working fine so the Purify module has failed.
    There were two options either to send the Amplifier back or get the new module and buffer shipped to me.
    As I live in the other corner of the world I decided to get the modules instead of sending amplifier back.
    This happened on Monday morning 9/21/2020.
    Warren shipped the new modules to me within an hour. I got them on 24th and my Amplifier was up and running within an hour of receiving the modules.
    As I got a chance to open the amplifier top cover, I was able to see the workmanship and layout of cables etc which was top class and solid.
    The initial impression was that these amplifiers are smooth sounding with wide and deep soundstage. I opted for Sparkos 2590. Looking forward to complete burn in to enjoy them fully.
    I would like to thank here Warren for his cooperation and top class customer care. We worked together like a team.
    There was nothing wrong with the amplifier and it was sheer bad luck that one of the Purify module failed which can always happen say one in thousand cases.
    I am a fully satisfied customer . Will look forward to buying again.

  2. Pete (verified owner)

    I have been listening to my VTV Purifi monoblocks for about a month. They are driving 10 year old VAF i93 speakers. Startling dynamics with fine detail and huge sound stage. Huge step up from my now sold Ncore 400’s. I purchased with the stock Hypex buffer, nice to know I can add other Op amps in the future to further “improve” the sound. The cases and the construction is top notch. Warren was a true professional to deal with.

  3. Steve Foote (verified owner)

    Let me begin by disclosing that I rarely leave reviews. But, this experience was exceptional and it deserves the effort.

    Months ago I had decided to look for a nice pair of Class D monoblock amplifiers to replace my then NAD Hypex-based Class D integrated. I wanted monoblocks to enable me to relocate my equipment stack away from the speakers without the need of long speaker cables. I knew that PuriFi was currently leading the Class D technology and the VTV Monoblocks with XLR inputs were at the top of my list for consideration. So, I ordered a set with the default buffers and started listening. The result was a nice improvement over the previous setup.

    Once I understood what I was looking for soundwise, I contacted Warren for advice on how to proceed in evaluating the custom buffer options. He recommended I try three different OpAmp options (Weiss OP2-BP, Sparkos 2590, and OPA1612), and send back whichever ones I liked the least. Several listening sessions spread over a week revealed a home run with the OPA1612 OpAmps. They’re perfect for me. In fact, they’re even better than I had hoped for.

    The real reason for me doing this review is to recognize VTV Amplifier as a shining beacon of customer service in a world that is sadly lacking it. Warren went out of his way to help me find exactly what I was looking for. I appreciate that. I love the amplifiers, and life is good!

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