I tried this with a portable CD player and an iPod using Paradigm Atoms and Bose 141s.

(*3.5 mm* Portable CD Player, MP3, Television, Ect

It stayed out from 7:30 PM to about 11:30 PM - but because I had this amp as well as a battery-operated CD player, I enjoyed fine music all through the night, albeit in the dark!)This unit is so small that it will fit in an ordinary pants pocket

The speakers are the limiting factor in the overall sound quality obtained; of course a good source is also necessary but I am using mine with an Insignia NS-P4112 Portable CD Player ($19.95 at Best Buy; that's about as cheap as you can get!

The music source is now this Stanton S.300 Tabletop CD Player with MP3 Compatibility, a superb CD/MP3 player which is far better than those 'cheapies' I had been using