I just hooked up this little amp to some 25-30 year old Polk 5JR speakers, and to my Sansa Fuze, and wow, nice sound! Still a lot of life left in those old speakers!
I also read that people have replaced the 12V 2amp (2000mha) with a (12vDC) 5 or 6 amp. They say they get cleaner sound, more sound, less distortion.
I ordered a Kinamax AD-LCD12 LCD Monitors 12V 6A 72W AC Adapter Power Supply from Amazon.com for like 11.00 (free shipping for prime members). I should get it in the next day or two.
I also see on amazon that they have some models with USB and SD slots, and can directly play MP3's.
I brought this for my dog, to play music during the day, so if I knew that there was a LEPAI amp that had USB/SD slots and would directly play MP3's, I probably would have bought that one. I turn it on and off everyday with a fancy "christmas light" timer. I know my fuze does not use a lot of electricity, but I have to keep the fuze on, while I can power off the amp, so having an included player would have been nice.