Hey, I am trying to design a simple Audio amplifier with components that I have on hand. The only limitation I think I have is my choice of op-amps, I only have basic op-amps, but they have a quick response time.

This is the circuit I have come up with so far. I am not sure how to make it more realistic for the 4-ohm resistor on the right. It is dissipating way too much power. any suggestions will help, this is new to me.

 

What you have here is a Class A amplifier and you just found out why they have an efficiency of less than 50%. The best way to beat this is to use a push-pull design. Vacuum tube amplifiers used a transformer to convert high voltage/low current to low voltage/high current but there is no point in that with a transistor design.

 

There are some better designs here: http://www.techlib.com/electronics/audioamps.html#4-transistor

 

Thank you guys, I built one of those audio amplifiers from that link you sent me Albert; it works well!