One guy who I would describe as a genuine &#x27;Audiophile Genius&#x27; is Nelson Pass. See: <a href="https:&#x2F;&#x2F;passlabs.com&#x2F;" rel="nofollow">https:&#x2F;&#x2F;passlabs.com&#x2F;</a><p>Nelson Pass has designed a series of innovative amplifiers that he sells as commercial products. He also releases circuit diagrams and build instructions his amplifiers, and helps out DIYers on public forums.<p>In contrast, it is great that NwAvGuy has designed a budget headphone amplifier, and released the design with a no derivative works allowed Creative Commons license. But that falls a long way short of what Nelson Pass has produced over the years in my opinion.<p>I think if you asked Nelson Pass whether or not all &#x27;decently made&#x27; amplifiers sound the same, he would suggest you need do a bit of listening to different high quality designs.