Tried active crossover, mean hum...

mortron · 6th February 2013, 08:43 PM

I just tried my active crossover out that I purchased, and using homemade cables, I am running unbalanced lines, XLR one end, and RCA on the other.

When I connect everything, there is a hum in my system from the crossover, but the preamp also contributed, as when I disconnected the inputs into the XO, some of the hum went away, but not all. Is there a possible mismatch in my system or is there a bigger issue?

Denon Cd deck > Bottlehead Quickie Preamp > Ashly XR2000 crossover > Denon POA 2400 amp > Speakers.

Anyone have any theories? I have lifted the ground from the XO, but it still hums.

mortron · 7th February 2013, 04:17 PM

Solved my hum problem... Now I have only one channel operating on the XO. So far I am skeptical of the unit. Is there any way to further diagnose this without using my amp? Thanks.

6th February 2013, 08:43 PM	#1
mortron diyAudio Member Join Date: Aug 2011 Location: Town	Tried active crossover, mean hum... I just tried my active crossover out that I purchased, and using homemade cables, I am running unbalanced lines, XLR one end, and RCA on the other. When I connect everything, there is a hum in my system from the crossover, but the preamp also contributed, as when I disconnected the inputs into the XO, some of the hum went away, but not all. Is there a possible mismatch in my system or is there a bigger issue? Denon Cd deck > Bottlehead Quickie Preamp > Ashly XR2000 crossover > Denon POA 2400 amp > Speakers. Anyone have any theories? I have lifted the ground from the XO, but it still hums.

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7th February 2013, 04:17 PM	#2
mortron diyAudio Member Join Date: Aug 2011 Location: Town	Solved my hum problem... Now I have only one channel operating on the XO. So far I am skeptical of the unit. Is there any way to further diagnose this without using my amp? Thanks.