Review of Altmann BYOB amplifier (hi-gain, tube-o-latored)

Hi Charles,

All I can say is, "WOW!"  Beautiful music, just beautiful. 

The BYOB amplifier is allowing me to hear everything in my source, and every change I make there.

Actually I believe am just beginning to appreciate your incredible BYOB amplifier, and am increasingly enjoying its sound. 

Pure and clean.  

Absolutely NO coloration. 

The greatest frequency extension I have ever had in a system - I think the bass goes down to zero-Hz, am I right? 

The highs are extended like no tube amp I have ever used (and I have used many excellent ones).  

I have used nothing but tube amplification for years, I love a good SET amp, but this amp confirms how colored they actually are. 

I can't believe I am saying that! -not me! -  but I say it with conviction. 

And quiet - extremely quiet - NO tube amp in my experience is "quiet" with very high efficiency loudspeakers as the Avantgarde Acoustics Hornspeakers are. 

Now mind you, the BYOB amp did take some break in (as virtually all things in audio do).  Cold out of the box, it sounded - well - cold. 

I "cooked" the amp with the Purist Audio Design - The System Enhancer Rev. B CD set on repeat for 12 hours continuous, volume level set at about 40%.  It was well exercised, but did not overheat. 

But what a difference after the cooking process! - and further refinement with further use. 

By the way, I am yet still on the battery's first charge - I am amazed, and can hardly believe it, but after this much use (2 weeks), the battery is just now reading a little above 12 volts and has not required even the first recharge. 

So , at this point, I can finally report to you, I am well pleased with the BYOB amplifier, and having the time of my life using it.  

I am hereby a new convert to battery audio and now a true fan, very intrigued by its potential in other areas in my system. 


We music lovers have got to get over our preconceptions and prejudices about the equipment used to reproduce music. 

A whole new world awaits us.

Brad Vojtech
President, Revelation Audio Labs, Inc. <>


This is a review of the Altmann BYOB Amplifier, Attraction DAC, Creation ADC, Altmann Phono Stage, , BYOB Speaker System, Altmann Acoustic Panel, Altmann UPCI (Ultra Precision Clock Injector) or Altmann JISCO (Jitter Scrambling Decorrelator).