How to make an overdriven amplifier?

Question

what are the specs of the materials?

Answer 1

I'm not sure what you are asking, an over driven amplifier is a distortion generator, usually not a desirable thing.

If you are looking for a "fuzz box" here is one web site with a schematic: http://www.redcircuits.com/Page91.htm (If you do a search I sure you can find others)