Hello All,
Maybe someone can shed some light on this one!
So, being an old fart in the industry, I may have dealt with cut wires or drywall screw through a wire just a couple of times before.
Naturally, I have solutions for this.? Step 1 ... determine just how many wires are good on the 4-conductor speaker wire.
Excellent, we have 3 good conductors.? So, there are 2 options.
1. Just connect the speakers in parallel, set the zone to mono, and everything is happy at ~4 Ohms.
2. Use a common ground because all of the negatives are typically commonly grounded on a multi-channel amp or receiver.? Now we still get stereo!
Because I ran into this exact scenario today, I decided to test the 8ZSA to verify the chassis ground situation.
I broke out the old multimeter, connected one terminal to the chassis ground, and tested all negative connections on the 8ZSA.
All RCA connections have the sleeve grounded as per usual.
Balanced phoenix connectors are grounded as well.
Left speaker?? Yup ... it's negative is showing a short with the chassis ground.
Surely the right speaker is grounded similarly, correct?? No, it is not.
For some reason, the right positive terminal is connected to the chassis ground.
In my almost 30 years I have never seen anything like this.
Just to make sure I wasn't losing my mind; I called some other members of our team on jobs in different stages of completion.
Every single 8ZSA that was checked has the right positive speaker terminals connected to chassis ground.
Can anyone think of a reason that this would be the case?
Is there some new "Bob Carver" form of amplification that has 1 speaker grounded to the negative terminal and the other grounded to the positive?
It would seem to me like the right speakers would be out of phase.
I have not had the spare time to place 2 speakers face to face, play a specific frequency from my tone generator, and listen for the cancelation.
True Blue just kept asking me if there was an actual problem.
Umm ... it depends if every right speaker on every 8ZSA is out of phase!
Please help!
Brian
