How to Connect Common Emitter with Emitter Follower to Speaker

[kchriste]

Your 10 ohm emitter resistors should be 1 ohm.

When it comes to output power I agree with you. When it comes to thermal stability, I disagree.
Since mbird stated that, "I really just want to "hear" the calcs I made to get my CE amp working" I decided to err on the side of stability. I assumed he actually wanted to build the circuit, probably on a breadboard, and wouldn't be thermally connecting the transistors to the diodes.

 

[audioguru]

If he doesn't thermally connect the diodes to the output transistors then he will learn about thermal runaway.
With your 10 ohm emitter resistors wasting a lot of power then there won't be thermal runaway and the OP won't learn about it.

I was going to simulate his common-emitter transistor that has very high distortion of about 40% or more (because it has no negative feedback), but I will let him hear how bad it sounds.

 

[mbird]

Wow -- a lot of great info in this thread!!!

I will experiment and post the results (may take a bit -- there is never any time for hobbies these days!)

Thank you!