I want to hardwire for 16 ohm. Cab is working, but one speaker is louder than the other 3. I figure it must be a problem with the switch? Do I need to replace the whole switch panel? Or can I just pretend the 16ohm input is the only input there and wire all four speakers off of it. I did that, but when I check ohms from a connected speaker cable it reads 26 ohms. I checked each speaker individually and they read 13.