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Just hooked up my Crown Xti-2000 to a Crown IC-150 pre-amp, and I have a lot of hum and some buzz. The IC-150 pre-amp outputs are going into a Bose 901 eq then into the Xti-2000 with an RCA to XLR cable. The hum is ridiculous. how do I solve this? I had and Onkyo M504 hooked up to the system just before I hooked up the Crown and there was no hum at all. Can I run the amp with nothing in the inputs just to see if it's the unbalanced leads going into a balanced inputs causing the problem?
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OOPs! I should be thanking Bill F. for this hot tip.
This little passive Rolls Buzz-off has totally stabilized my system. For the $60 bucks I spent (Guitar Center), I have a PRICELESS stable Quad surround sound with absolutely NO HUM! Big props Bill!
Hey TONY 3D
THANKs so much for your post. I was having a similar problem going from my surround processor into my audio system. It would sound terrific for awhile, then the unbalanced side would start humming and sound awful. I tried isolating the current and plugging to a different pwr. source, but nothing seemed to work.I found a Rolls HE 18 BUZZ-OFF, hooked it up between the line out and the audio system, and now, it sounds unbelievable AND NO HUM!!!
It's probably a ground loop and probably caused by mixing balanced and unbalanced connections. This should help:
I found the ground loop problem! It was the cable box which goes into my 62" tv then the tv goes to my Crown IC-150. Pull those off the Crown and the buzz and hum are gone. I bought the Rolls he18 hum reducer and hooked it up between the tv out and Crown IC-150 and that took care of the hum in my system and doesn't effect the rest of the system. Sounds great plus I can't get the amp hot enough to run the fans. I'm very happy so far. I have no hum or buzz the amp is very quite. My question is why don't more people buy these pro-amps for home stereo's? This is a very clean powerful amp for $699.00. You would pay at least $1800.00 for half the power in a consumer amp. I'll never look back. I will admit the sound is a bit more analytical the best way I can describe it. I'll never run out of headroom. I have to laugh when I hear people talk about how harsh these pro amps are, I sure don't find them harsh at all.
...to my Crown IC-150Ever tried a different preamp?
I have made the same move recently going from a "home" amp (Adcom, Arcam) to a pro amp (Qsc). Yes the added power makes a hugef difference. It's awsome. What speakers do you have?
I have Magenepan.
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