After all these years I finally had to change out one of my active crossovers in my HT/Stereo set up. I can't tell you how many times I tried redoing grounds/lifting grounds over the last month trying to figure out where a persistent hum that developed was coming from. I had to physically move the rack and cable harness and gave up cable which complicated things. Hum started shortly after. No matter what it just wasn't going away.
Well to make a long story short it was internal to my M553 crossover. Moving things was just coincidental to the real cause. Looking for a replacement I found DBX 234XS which was a direct replacement in the rack no rerouting of no cabling required. Thank god!
If you ever face a similar circumstance check the individual components not just the cables and grounds. Would have saved me lots of time. I found it by simply powering up the M553 inputs off and turning on the amp to my E-145's. Hummmmmmmmmm!
The DBX is supper quiet so all is well!!
Rob
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