cut the problem in half.
Try another amplifier. ANY amplifier, surround sound receiver, 1978 Sony 30 watt integrated, anything at all....it does not matter.
The dividing line in the halves.... is the speaker/cable pairing vs the source/cable/amp pairing.
The perceived result will tell you which half of the equation contains the problem.
10g speaker cable is usually a bad fit anywhere, btw....
Try another amplifier. ANY amplifier, surround sound receiver, 1978 Sony 30 watt integrated, anything at all....it does not matter.
The dividing line in the halves.... is the speaker/cable pairing vs the source/cable/amp pairing.
The perceived result will tell you which half of the equation contains the problem.
10g speaker cable is usually a bad fit anywhere, btw....