I would like an amplifier that can amplify AC (a square wave at ~50-100kHz) and DC. I would like to get a stereo audio amplifier and have each channel drive a different coil (one for the AC, one for DC).
The input (for the dc amp) will come from an a/d converter and vary from 0-3v at a max of ~30hz (although random not sinusoidal) and I'd like the output to go up to about 24 volts 1amp. I have 12v & 24v power supplies but am happy to get more.
Can an audio amplifier do this or be modified to do this? If yes, is there a specific type I should get?
I was originally planning to use an op amp, but mine can only do about 10W and an audio amplifier would be so much more convenient.