Hi,

Firstly (Tony), apologies if this has been covered before as I can't seem to find this one in the FAQ or by searching.

I have just spent a very long time chasing out the dreaded alternator whine, and traced it to the fact that by design, only the rear RCAs are grounded inside the Empeg.

Why are only the rear sled outputs grounded and not the fronts and AUX? Is this a design feature to prevent formation of ground loops, or an oversight? as when using a multiple amplifier system, the front signal ground is left floating and is open to induced noise in the RCA lead.

This was cured by the addition of ground leads from my RCA plugs to my new SUPERgound(tm) wire installed in a previous attempt to rid my system of the aforementioned whine.

Oli.