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Author Topic: intermittent sound dropout
Martin McCaffery
Film God

Posts: 2481
From: Montgomery, AL
Registered: Jun 99


 - posted 01-23-2012 01:18 PM      Profile for Martin McCaffery   Author's Homepage   Email Martin McCaffery   Send New Private Message       Edit/Delete Post 
quote: Dominic Espinosa
Nevertheless I'm curious as mentioned above: when it's dropped out do you hear full signal from the monitor listening to the amps or processor or both?

I believe the monitor comes off of the amp (Louis can tell you if I'm wrong). When the sound drops out, you hear the dropout on the monitor.

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Tony Bandiera Jr
Film God

Posts: 3067
From: Moreland Idaho
Registered: Apr 2004


 - posted 01-23-2012 07:42 PM      Profile for Tony Bandiera Jr   Email Tony Bandiera Jr   Send New Private Message       Edit/Delete Post 
quote: Martin McCaffery
I believe the monitor comes off of the amp (Louis can tell you if I'm wrong). When the sound drops out, you hear the dropout on the monitor.
That makes it 99.9999999999999999999999% probability it is the amp or crossover. [Big Grin]

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Ron Lacheur
Jedi Master Film Handler

Posts: 650
From: British Columbia, Canada
Registered: Feb 2002


 - posted 01-23-2012 09:38 PM      Profile for Ron Lacheur   Email Ron Lacheur   Send New Private Message       Edit/Delete Post 
I'm still thinking it's the gain pot on the amplifier. Do you get static when you rotate it?

Put the processor in mute and crank your booth monitor to max ( hopefully they aren't set specifically for SPL ). Cycle the pots back and forth. If you hear any static, that's most likely the issue.

I used to do this with QSC MX amps and it was quite effective in figuring out which ones needed repairs.

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Eric Robinson
Jedi Master Film Handler

Posts: 538
From: Santa Rosa, CA
Registered: Jan 2005


 - posted 01-23-2012 11:12 PM      Profile for Eric Robinson   Email Eric Robinson   Send New Private Message       Edit/Delete Post 
OK. I'm probably going to get roasted for this but,

quote: Tony Bandiera Jr
That makes it 99.9999999999999999999999% probability it is the amp or crossover.
Assuming the monitor is tied to the amp outputs only, a high freq drop which originates from the processor outputs would create a high freq drop on the monitor also.

Not arguing the point, I may have it totally bassackwards somehow.

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Louis Bornwasser
Film God

Posts: 4441
From: prospect ky usa
Registered: Mar 2005


 - posted 01-24-2012 09:34 AM      Profile for Louis Bornwasser   Author's Homepage   Email Louis Bornwasser   Send New Private Message       Edit/Delete Post 
1. The monitor is across the amplifier output.

2. The crossover is part of the amps. Ashly XR-1 crossover is a problem, but the amp is sterling. (3 db down at 100K)

Yes, we all agree that the bad pots/switches are almost certainly the problem. That is why we redesigned the crossover. louis

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