hi everbody, I did a simulation for the LM1875T and the freq. response is up to 100khz. after 100khz it begin to roll off. do we need any capacitor to limit the bandwith within audio spectrum.
there should be two filters at the input.
The high pass needs a plastic and metal cap. Try not to use an electrolytic.
The low pass also needs a plastic and metal cap, but can make do with mica and metal.