Help with Noise from Coustic xm-7

[WaTTsLOk187 10+ year member]

Well I temporarily installed my rescently acquired coustic xm-7 crossover to try it out on my AA poly mids and my Vifa tweets. But I am getting this hissing and slight beeping coming from my mids and tweets. It is kind of high pitched sort of like alternator whine but it is there even with the car off. Here is how it is wired.

Kenwood kvt-911dvd > Audiocontrol epic-160 > Coustic Xm-7 > Memphis 300-4

I have tried bypassing the xm-7 and sure enough the noise is gone.

I have bypassed both epic-160 and the xm-7 and went straight from HU to the amp and sure enough noise is gone.

I have bypassed the epic-160. Went from HU to the xm-7 and noise is still there.

I am getting power from my amp for the coustic. I have moved the ground for the coustic and i does nothing. Any ideas?

Any and all help is greatly appreciated.

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[dleccord 5,000+ posts]

why's the epic there if you're just running mids and highs?

 

[djman37 5,000+ posts]

why's the epic there if you're just running mids and highs?

even so, run the Epic AFTER the crossover, only to the lows.

any input adjustments for gain on the XM-7???

 

[helotaxi 5,000+ posts]

even so, run the Epic AFTER the crossover, only to the lows.any input adjustments for gain on the XM-7???

That doesn't work. The EPIC, or any Epicenter, needs a full range signal to do its thing.

 

[j3bus2k3 5,000+ posts]

I hope this is an isolated problem...my XM7 gets here tomorrow...

 

[djman37 5,000+ posts]

That doesn't work. The EPIC, or any Epicenter, needs a full range signal to do its thing.

is that because it needs to find harmonics?

 

[WaTTsLOk187 10+ year member]

Exactly! The epic-160 needs a full range signal. I can run EVERYTHING off the xm-7 afterwards since the xm-7 only needs one input signal. But this **** noise is kiiling me!

 

[helotaxi 5,000+ posts]

is that because it needs to find harmonics?

Actually it CREATES sub harmonics.

 

[djman37 5,000+ posts]

Actually it CREATES sub harmonics.

right, that's what I mean. Just running off the low out, there wouldn't be much material for it to create harmonics to.