You know, many people do not understand what electric current is. This doesn't stop them using TV and microwave ovens. Description i gave here (and readme.txt) gives reasonable explanation to the person aware of how his amplifier works. What voltage amplifier and current amplifier is... and their functions within device. So, give it a listening test, to make your skepticism some arguments ;-)
P.S. Excuse me if my post appear to you having some offensive tones. I'm really tried to avoid it look like so.