What are the most transparent headphone amps? What I mean by transparent is that it sounds like your bass does acoustically. No coloration on your sound. I'm trying to get as much tone out of my bass without an amp, but it's is hard to hear my bass unless I play hard (which alters my tone greatly) So, I need an amp that can acurrately reproduce the sound that comes from my bass acoustically. I KNOW that pick-ups do change your sound alittle, but I'm going to have to live with that. BTW, I bypassed my pre-amp.