I am new here so pardon if this has been discussed to death.. I have a Bravo II Headphone amp (did a pretty in depth review on another forum) and have never experienced any sonic issues. The thing I liked best about it was it had a standard 12AU7 tube (Shugang) that I easily rolled with some NOS vintage tubes. Amazing, the different flavors ..Mullard, GE, RCA... I did use it as a buffer (improperly I am told) from a tablet to my main rig using the headphone jack to a pair of RCA's as an aux input to my Marantz pre. I was told NOT to do that as their were some nasty electrical variances coming out of that jack... Strictly as a headphone amp though, I think it sounds great with my Senn HD280 Pro headphone..no ..not top of the line, but decent. I think many people can benefit from the BRAVO ...Just as in other pieces of equipment ..there are the enthusiasts and the premium audiophiles...its all about the music , right ? I find the gain control to be just fine however; agree that too much (past about 1 oclock ) can introduce some distortion.