@jred1000 That ms-8 looks nice on paper but that is a lot of bare wire back there, have you confirmed you do not have wires crossed or touching?
1. which zones sound bad? Closest to the ms-8 or furthest away?
2. Do they sound bad when other zones are played simultaneously?
3. Try swapping wires of the bad zone at the back of the ms-8, say move speaker D wires to speaker G output and see if speaker D still sounds bad?
I believe my outdoor speaker volume controls are old school, hard wired 100 watts. Like every other electronic device that has moving contacts, I believe they can wear out.
1. which zones sound bad? Closest to the ms-8 or furthest away?
2. Do they sound bad when other zones are played simultaneously?
3. Try swapping wires of the bad zone at the back of the ms-8, say move speaker D wires to speaker G output and see if speaker D still sounds bad?
I believe my outdoor speaker volume controls are old school, hard wired 100 watts. Like every other electronic device that has moving contacts, I believe they can wear out.