Question: Troubleshooting Amp & Volume Controls

[jbonecpa]

I'm using a MX1260 amp along with VMT-100 impedance matching volume controls (All Phoenix gold).
I have 6 pair of speakers in different rooms attached to the amp with 6 volume controls.
All of the volume controls are working fine, except one. This particular volume control, after turning on the amp for less than 5 minutes, got extremely hot and part of it's circuit board turned black. I could smell it burning, that's when I turned off the amp. The speakers in this room were playing initially, but stopped around the time I started smelling the burning.

What could have caused this?

I have the impedance jumpers on each volume control set to 8x.

 

[mtrycrafts]

I'm using a MX1260 amp along with VMT-100 impedance matching volume controls (All Phoenix gold).
I have 6 pair of speakers in different rooms attached to the amp with 6 volume controls.
All of the volume controls are working fine, except one. This particular volume control, after turning on the amp for less than 5 minutes, got extremely hot and part of it's circuit board turned black. I could smell it burning, that's when I turned off the amp. The speakers in this room were playing initially, but stopped around the time I started smelling the burning.

What could have caused this?

I have the impedance jumpers on each volume control set to 8x.

A possible short in that speaker run? Or in that volume control?

 

[AVRat]

The other thing is that since you are powering each speaker with its own amp, the VC jumper should be set for 1X.