The common emitter amplifier that we saw last time is an inverting amplifier, in that as an increasing current on the base causes more collector current to flow it pulls the collector voltage down.

This simple mosfet power audio amplifier circuit, with TL071C and 2 MOSFETs (IRF9530 and IRF530) can deliver up to 45W on 8Ω speaker or 70W on 4Ω speaker.

There appears to be 16 large transisitors which were mounted to the heatsink of this amplifier. It is a Planet Audio 4 channel car audio amp. From some quick Google searching, it looks like I ...