if you hook a laptop or phone to the rca jacks it boots the volume very well which is why i give it a 2star but far as using the multichannel function i was unhappy with its performance the multichannel was my whole reason for purchasing this product when 2 or more channels are in progress it tends to make humming noises with an occasional popping sound coming from the other channel that is suppose to be

Noise can annoying

And, I think I detect a slight extraneous noise on the output

Bad hum noise