A bit disappointed with the longevity of the product, I did not expect that it lasts as long as the pioneer it replaces (15) but two weeks is a short time. Well, I moderate the opinion because it emits a horrible sound of sizzling, but it still works if we stand this awful noise ... I not support anyway. So why two stars anyway, simply because it also has a power plug 9v, so I use it with a hard drive transformer and there, the sound is normal ... only concern is the button / off becomes inoperative, so to turn it off, disconnect the forcibly at each end of use, not very convenient! So here, I'm not too bummed because given the price, I was expecting not much better. Otherwise, power side, it feeds without problems 100w my big Jamo speakers, or 2 stars!