2. amps-preamps
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Hum issue - driving me more crazy

Page 1

Not sure if this should be here, Tech talk or Cables...

Audio Research Ref 2 Preamp, Pass labs electronic Xover, Bryston 4B ST amps (2), MAGGIE 20.1 speakers. All eqpt working OK.

Pre source eqpt left rear of room
spkr amp & XOVER left front of room
spkr amp right front of room

Separate 20 amp circuit for hifi eqpt. Other plugs in rooms for lamps, etc. Many of lamps on dimmers

Singlended IC's (now double shielded)are "under" flooring (pier and beam construction) & has been moved away from other wiring & cross at right angles

Initially some hum from dimmers (on separate circuit), etc. Have learned to leave them off.

But there is constant low level hum - right side only EVEN with preamp and XOVER turned off.
imdoc

Showing 1 response by forrestc

forrestc
114 posts
 
You don't have a TV or tuner connected to cable or satellite whic is connected to your system do you?

Cable and dish installations are often grounded in a different location than your mains ground which almost always creates a ground loop though your audio system.
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