Summary: I ended up returning this unit. Everything worked as advertised (I never actually tried the USB In). The problem was that there was a constant hum/buzz both from the unit itself (power supply I presume) and through the speakers. The noise through the speakers was very low-level but constant.
Summary: Excited to receive this item and when the first one arrived the USB port didn't work. Things happen, I understand, so I sent it back. The new one arrived and the speaker connectors fell off, not "got broken" but fell off at the slightest touch, much less trying to wire a speaker.
Summary: I BOUGHT THIS ONE USED FOR ABOUT $42. I LOOKS LIKE NEW BUT IT ARRIVED DOA. IT WAS NOT REPLACEABLE - ONLY RETURNABLE FOR REFUND. IT WOULDN'T POWER UP SO I DECIDED TO OPEN IT UP AND WAS ABLE TO FIX A BROKEN V OLTAGE SELECTOR SWITCH.
Summary: Immediately connected into my communications system to drive two JBL 50 watt speakers and it does it with ease. Good sound quality and it allows me to monitor USB, two AUX, CD, MP3, Computer and more for a very reasonable price.
I switch between my Sony speakers and my Sennheiser headphones everything sounds great! My only problem is the terrible distorti
Lon A. Vasquez, Amazon
25 March 2016
Summary: I bought this amp over a year ago to use with my Fiio hi definitely digital player. I also have a high end Toshiba cd player and my Technics turntable with a power amp, I switch between my Sony speakers and my Sennheiser headphones everything sounds great!