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Measuring Mixer Output?

Posted: Thu May 08, 2014 8:36 pm
by doncolga
Hey all,

How would I go about measuring my mixer output?...it seems to have gotten really wimpy. I can crank up the gains and it barely lights up its own output meters or the DEQ 2496 which is next in the chain.

Thanks!

Donny

Re: Measuring Mixer Output?

Posted: Thu May 08, 2014 8:47 pm
by Bill Fitzmaurice
With a voltmeter. Use a sine wave input.

Re: Measuring Mixer Output?

Posted: Fri May 09, 2014 9:19 am
by SoundInMotionDJ
doncolga wrote:How would I go about measuring my mixer output?...it seems to have gotten really wimpy. I can crank up the gains and it barely lights up its own output meters or the DEQ 2496 which is next in the chain.
The DEQ has a "pad" button on the back for the input. I forget the values, and it's in rack...but check that setting.

What is the input to the mixer? Are you sure that is producing a high enough signal. Headphone jacks rarely produce as high an output as say the "line out" on a CD player.

Does this happen with more than one input channel to the mixer?

Is the input to the mixer expecting a "phono", "line in", or "mic" signal level?

And use a sine wave, 1kHz is a handy frequency.

Re: Measuring Mixer Output?

Posted: Mon May 19, 2014 11:59 am
by byacey
If it won't even indicate much on it's own meters, don't worry about the pad on the gear downstream from the mixer.

If it's an RCA connector output, usually it's anywhere from 200 to 317mv (0.317 volts) at 0db. XLR and usually (1/4") output is 0.775 to 1.5V measured between pins 2 and 3 (or tip and ring) of the connector at 0db.

Re: Measuring Mixer Output?

Posted: Mon May 19, 2014 6:33 pm
by escapemcp
SoundInMotionDJ wrote:The DEQ has a "pad" button on the back for the input. I forget the values, and it's in rack...but check that setting.
+12dBu or +22dBu (both MAX)
I've been deliberating which to use for ages. If you use the +22dBu in and want to use the aux out as a through line (no processing), the aux output is max +12dBu, so it distorts :wall:
If I use the +12, my mixer sends far too hot a signal and I can't expect DJs to keep it below -4dB :horse:

Donc - Check for dodgy leads? from your description it sounds like your mixer isn't getting a hot enough signal :|

Re: Measuring Mixer Output?

Posted: Tue May 20, 2014 10:52 am
by byacey
On most mixers I've ever seen, the signal for metering is picked off before the final output buffer stages. Even with a shorted output connector the onboard meters should still read normal.