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clip light
Posted: Tue Jun 08, 2010 8:36 am
by DJ Big Ronn
I've noticed this for some time, but i figured i'd address it. One channel on my sub amp clips sooner than the other. Both channels are loaded the same so this isnt the reason.,. Regardless of how i turn down the channel thats clipping, it wont affect it, leading me to believe its input rather than output. Is it normal for one chennel of say the DCX to be hotter than the other?
Re: clip light
Posted: Tue Jun 08, 2010 8:56 am
by Sydney
I'd check with a voltage reading with sine wave along the signal path.
Syd
Re: clip light
Posted: Tue Jun 08, 2010 9:18 am
by DJ Big Ronn
I'm not sure how to do that with XLRs
Re: clip light
Posted: Tue Jun 08, 2010 11:10 am
by netwerks
To get a decent measure of full voltage output, put in a 1.4Vrms sine wave (which will measure 0.775Vrms between pin 1 & 2, and/or pin 1 & 3 on the XLR input
Re: clip light
Posted: Tue Jun 08, 2010 11:13 am
by Sydney
Netwerks did a succinct job,
But I'll go ahead with my winded response
( I was trying to find these links )
Referring to:
https://ssl.kundenserver.de/adt-audio.c ... Trs780.gif
Disconnect the XLR input to the amps and measure across the pins of channel A and then compare them to the same pin pair on channel B.
What you can determine/eliminate is IF there is a voltage difference, AND at what point in the signal chain it begins.
A process of elimination, working from one end of the signal chain to another - it should track
http://www.colomar.com/Shavano/snake_cable_diy.html
Syd
Re: clip light
Posted: Tue Jun 08, 2010 3:16 pm
by netwerks
Sydney wrote:A process of elimination, working from one end of the signal chain to another - it should track
Syd
+1 Syd!
Re: clip light
Posted: Tue Jun 08, 2010 3:21 pm
by DJ Big Ronn
Ok, so lets say that i find the culprit, is it common for this to happen in some units?
Re: clip light
Posted: Tue Jun 08, 2010 6:17 pm
by Ron K
It's more common on gear that has had the inputs beat to death by someone who doesn't know what the red lights mean! You can only pound the input circuitry so hard for so long until it begins to mess up the components in the signal path. May start out by just reducing voltage a bit but could end up sounding like crap depending on what and how bad the damage is in the unit.
Re: clip light
Posted: Tue Jun 15, 2010 9:26 pm
by djtecthreat
This wouldn't happen to be a QSC RMX2450 would it?
Re: clip light
Posted: Thu Jun 17, 2010 5:53 pm
by DJ Big Ronn
Nah, its a Peavey PV-2600
Re: clip light
Posted: Mon Sep 27, 2010 9:52 pm
by Conway Jennings
hmm is this a common issue for RMX 2450s? This tends to happen on my sub amp. It doesn't seem to be happening to the other RMX 2450 that's powering my tops. Of course, it could be in the DSP or mixer, and I haven't checked yet. (will do soon, but you make it sound like this is common in that amp)