One .1uF (Film if possible)
Three Electrolytics 10uF, 22uF and 47uF
Two 10K resistors
One 47K resistor
Two 100K resistors
One NPN transistor 2N5088, 2N2222 etc....
One 5K linear pot.
Yes, you need a stereo input jack, mono output jack, perfboard, box and switch. In addition, either a transistor socket or DIP8 IC socket (easily found).
The box and switch can be omitted for our project since you can run this circuit right off of the perfboard and jacks if you want.
You also need 4 pieces of hookup wire and a battery snap.