New bookshelf speakers making "heartbeat" noise when stereo is on.?

Dragunov-21

New member
I have an old Yamaha AST-C10 stereo. I recently bought a pair of Wharfedale bookshelf speakers (9.1)s, and hooked them up.

When I turn the stereo on, the speakers emit a couple of fast heartbeat-like bass tones, then emit them slowly while oscillating at about 1Hz

The original speakers (Yamaha AST-SC10) work fine, though I'm not sure what their impedance is (the Diamonds are 6 ohm)

Anybody have any idea what could be causing the interference?
 
Back
Top