Greg Cameron wrote on Fri, 26 June 2009 18:50 |
As for how well the limiters in your DCX work in terms of punch-though and sound quality, I haven't used one. But I suspect other here have and will chime in. |
Greg Cameron wrote: |
Peak limiters are usually not useless so long as your amps are relatively matched to the program power of the speakers. |
Ron Kimball wrote on Sat, 27 June 2009 05:55 |
Well, I was hopin' to use it to protect a pair of 200wrms PV118's run off an RMX2450 as the sole subs for an outside gig today I stupidly agreed to - maybe I get to blow my first drivers today ? |
Jeff Wheeler wrote on Sat, 27 June 2009 10:16 |
Does amp clipping (and the harmonic distortion that comes with it) cause damage to subwoofers? I thought no, and thus have not been afraid to drive my sub amps to mild clipping all night long. Honestly I figured any woofers would not be damaged by a clipped waveform. |
Jeff Wheeler wrote on Sat, 27 June 2009 10:16 |
Does amp clipping (and the harmonic distortion that comes with it) cause damage to subwoofers? I thought no, and thus have not been afraid to drive my sub amps to mild clipping all night long. Honestly I figured any woofers would not be damaged by a clipped waveform. |
Jeff Wheeler wrote on Sat, 27 June 2009 12:16 |
Does amp clipping (and the harmonic distortion that comes with it) cause damage to subwoofers? I thought no, and thus have not been afraid to drive my sub amps to mild clipping all night long. Honestly I figured any woofers would not be damaged by a clipped waveform. The DCX2496 does have a compressor on each output that could be used as a rough RMS limiter. I am not sure how much you can do on it before you run out of processor power. I've only had one for about a week and have only had it out once. I agree with Greg that one side of an RMX2450 is not going to threaten a PV118. My DJ colleagues and I have been abusing the heck out of a pair of similar Peavey subs (that are so old the 1/4" jacks are developing rust) with an XTi 2000 in stereo for a year, and they still work fine. |
John Roberts {JR} wrote on Sat, 27 June 2009 14:04 |
The larger issue with driving sub amps past clipping, is that the main way you get amps to clip is by turning up the system gain. While the loudest parts are now clipping, the quieter parts are also playing much louder. |
Quote: |
Note: Compressing the program material is counter productive for loudspeaker protection. Compression raises the average level relative to the peaks. The amp will be heating the drivers even more at clipping than before the program material was squashed. |
Ron Kimball wrote on Fri, 26 June 2009 15:13 |
Does anyone know FOR SURE if the limiters on the DCX2496 are peak or RMS? If peak (= kinda useless?), can the dynamic eq be used as an RMS limiter? Does anyone know FOR SURE if the thresholds are offset off of +22dbu or ? Behringer manuals sure suck ! |
Greg Cameron wrote: |
After a quick glance at the manual, it's pretty simple. The limiter can be set for limiting between 0 to -24dB which should equate to +22dBu to -2dBu of actual output. |
Ron Kimball wrote on Fri, 26 June 2009 20:13 |
Does anyone know FOR SURE if the limiters on the DCX2496 are peak or RMS? If peak (= kinda useless?), can the dynamic eq be used as an RMS limiter? Does anyone know FOR SURE if the thresholds are offset off of +22dbu or ? Behringer manuals sure suck ! |
Ron Kimball wrote on Wed, 01 July 2009 00:57 |
Interesting data! It would be more useful if there was a vertical scale and even more useful if there were graphs of the inputs also. Pink and/or white noise would be good to try too . If the limiters are rms I would expect the output to be only down 3db (=.707 of) from the sine - this seems to show much more? |
Nick Hickman wrote on Tue, 30 June 2009 17:12 |
...I did do some tests and there appears to be a lot going on with the DCX2496 limiters. They appear to combine both RMS and peak detectors... |
Scott Smith wrote: |
GREAT TESTING! Is that typical in limiters? It seems to be a good solution for my needs. |
Nick Hickman wrote: |
Output measurements were as follows: |
Ron Kimball wrote on Wed, 01 July 2009 16:56 |
The reason for my post is that there doesn't seen to be any published data as to how these loudspeaker management limiters work. It does start to look like the Behringer does RMS limiting which is exactly what I want . |
Nick Hickman wrote: |
The BSS FDS-366, for one, offers an adjustable margin between its RMS limit and its peak limit. |