Used for a year and a half. I had a good headphone amplifier that has made me, I had to troubleshoot a Behringer silent but the sound really terrible.
The Aphex trsdfini makes a sound with a very large reserve of power. It is possible (with the pice accessory purchase separately) to attach a microphone stand proximity of the musician who records, which allows him rgler noise level itself .
Nice little headphone amp, but does send only one circuit (it must therefore acqurir several if you wish to use more of a feedback circuit). on the other hand you can connect 4 headphones maintaining excellent sound quality.