HELP! We need to produce sound to a speaker by using a push pull power amp. The problem is, the speaker's impedance (8ohms) is very small compared to the circuit's output impedance (about 36ohms) that's why we have very low output voltage. Without the 8ohm speaker we have about 200 gain but with the speaker we have a less than 1 gain. what could we do with our power amplifier circuit. It is a push pull using 3904 3906 with diodes 1N4148. Thanks!

 

As always, schematics?

My first inclination is a matching transformer. You could wind a toroid from scratch.

 

You must not have a circuit, because you didn't post a schematic.

If you DO have a circuit, then post its' schematic. Without that, we're just wasting each others' time.

 

Sorry I forgot! Here's my schematic

 

Here is an audio amp that will easily drive eight Ohms or much lower impedances.