I purchased this 6 channel head phone amp about 2 years ago. It looks outstanding and for almost 2 years it worked great. The individual channel full control of tone, volume and audio image, I was very impressed with this unit, until about 7 months ago. I rarely use channel 2 but one day the level meter shot to peak level but no sound was emitting from the channel. Since I was in he middle of a project, I decided to just use one of the remaining 5 channels. This past Sunday, I started to plug in a set of headphones for a musician and as I touched the channel input with the jack, the level meter peaked and you could smell burning circuitry. If you don't mind having a unit for a year or 2, this could be a very good unit for you however, If you want something dependable I suggest researching and buying another more dependable unit from Sweetwater. Sweetwater is an outstanding customer service company, ART HeadAmp6Pro, buy something else for a long term investment.