I have an audio signal of these characteristics coming out of an instrumentation amplifier:-
DC offset: 2.5V
I also have some 1/4W 8 Ohm and 64 Ohm speakers pilfered from old transistor radios. I would like to be able to hear the audio component of my signal. I can just about hear it if I plug the 64 Ohm speaker directly into the in amp output, but of course that's not the proper way. The speaker is to be mounted permanently to act as a verification device that all the circuitry is working. It is not a temporary thing. I also need to maintain the signal levels for further processing down stream so I can't suck all the voltage level out of the in amp.
I've considered a single transistor voltage follower, a simple discrete component class A amplifier and the venerable LM386 audio amp. I also have a 13.8V power rail. Is there a simplest option to hear my noise?