The KSN1025's were merely wired parallel to some older Peavey 2x10 PA cabinets. These were rated 8 ohms each cab, so there were two 16 ohm 10's in each. With no HP driver, just the 2x10's on each side, regardless of how loud, or how you set the EQ, the vocals were muffled sounding... just no clarity.

I built some little boxes, covered them with matching black vinyl to hold the 1025's. These little boxes were merely plugged into the parallel jack on the back of the 2x10 cabs. No caps, no resistors, nothing. Could the inductance of the voice coils of the woofers be the problem?