Do you have a multi-meter? If you do then put the leads on the speaker posts and see if you get a reading . With music playing the meter will fluctuate!
Help with hookup
Inherited some audio equipment. Hooking up a McIntosh mc2300 preamp to a McIntosh mc352 amp to a pair of Acoustic Zen Adagio speakers, but I don't get sound out of the speakers. I can hear when I plug in the headphones, so there is that. Any ideas?