Hi,

Tony's right, but there is another path that the 4 pigtail connectors take in the Empeg. The 2 RCA jacks are ahead of the output drivers for the 4 separated RF, LF, RR, LR ouitputs. They take another additional path. The Right RCA is connected to the RF output of the DSP, the Left RCA is connected to the LR output of the DSP. Was the noise coming from both the front and rear speakers? The rear Amplifiers have a dedicated path that the RCAs will not see.

The output amplifiers and their associated Tantalum capacitors may be the problem. There was a thread we worked on that may help you if you want to play with your Empeg and troubleshoot it some. The complete path and other information related to this type of problem are discussed. The thread name is "Losing left audio channel" and starts with message# 333771. You might check it out.


Is the noise repetive and "chirpy" (like digital databus noise)? This sounds like the old Dial-up MODEM noise during the Training process where it evaluates and establishes the maximum data rate the phone data connection can sustain.

Is the noise a single tone (like a demodulated digital clock)?

Is the noise a loud burst of static-y noise or popping noise and then fades out (like analog noise from a dying coupling capacitor, a dying semiconductor junction, or a DC-bias shift in a bad Opamp feeding a coupling capacitor, or other circuit)?

Is the noise a buzz that changes pitch periodically (like the disk drive spin-up/spin-down) like a bad power decoupling capacitor, dying motor driver in the disk drive, or a bad regulator might cause?



Or is it just the type of music you listen to? <grin>

I have heard some music referred to in music reviews as the sound of a dentist drill, Black & Decker Drill, etc.... Some of mine fits into this category.



Ross
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In SI, a little termination and attention to layout goes a long way. In EMC, without SI, you'll spend 80% of the effort on the last 3dB.