What is the best "Op-amp Circuit" that....
- Has stereo output & uses 8ohm speakers?
- Has a 3.5mm audio jack input?
- Can receive it's audio signal from...
-A- a MP3 player's 3.5mm earphone jack
-B- a laptops 3.5mm speaker jack
-C- a PC microphone (external mic) - has adjustable volume?