Question about Behringer Sx2442fx Eurodesk 24channel Mixer New

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Sound gets muffled at certain frequencies. Please Help!

We are using a Eurodesk 2442FX for our church audio system. For vocal to track performances. There has been a problem with the audio being muffled when it seems to hit a certain level or frequency, it doesnt seem like a malfunction but seems as if the board is going into some type of protection mode. We are using alot of High frequency on the mic, the volume of the mic track is passed unity gain during performance. When the sound muffles i take away some trim and high and it will return to normal audio and then go back to being muffled soon after. How can i prevent this from happening??? it is becoming a problem to our singer and our audience, we are a house of worship and this interrupts us. (Equipment: 100ft Musicians gear snake, 2 Allto Professional 800 Watt Active speakers and 1 Alto monitor with same specs, speakers are being plugged into the Eurodesk 2442FX through Snake returns on stage into Main Out Left & Right, Stage Monitor through AUX Send 1.. Audio Track is being played through Track 17/18, usually leveled at Unity gain with a little more trim and high and less low Please Help, thank you!

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  • 3,130 Answers

I think that rather than the mixer, that your front speakers may have a limiter built into the high frequncey amp. You may be asking them to do more that they are capable of.

Posted on Mar 05, 2017


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Posted on Jan 02, 2017

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SOURCE: no sound to speakers

There are many things, including hardware failure to cause this.

Make sure that the PFL buttons are ALL up. The LED indicators on the right are shared with solo channel and main output.

REMEMBER that the MAIN 1/4 inch jacks are TRS balanced and plugging a mono cable into these OR st the other end plugging into a MONO will short out the balanced line drivers. Since this also goes to the power amp, that can ground out the signal to the amps. All the other 1/4 inch jacks are pseudo balanced and mono plugs will not cause a problem other than possible hum or noise levels.

Do you get anything out of the PHONES jack?

Note that the standby switch must be UP in the upper right corner... it kills the first 12 channels. ALso with two speakers make sure the MAIN slide switch is in the MAIN A MAIN B upper position.

Start with all your PAN controls at 12 o'clock.

I have repaired two of these units and a PMP3000. Great caution: NEVER pull or insert speaker cables while unit is on. Great damage can be done. IF the fuse blows do NOT replace it!!! Get serviced immediately as replacing the fuse will likely do more damage. The worst damaged one required replacing around a dozen transistors and other components.

The power amps in these have a habit of arcing out... NEVER store in a high humidity area!!!

Try a set of stereo headphones plugged into the L and R MAIN out 1/4 inch jack... If you have audio there your power amps have failed or the +/- 85 volt supply has smoked.

Posted on May 19, 2010

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SOURCE: I am currently having problems with our PA System.

To get to full power your speakers to be at 4 ohms, not 8. You can achieve this by either using to 4 ohm speakers OR chaining to 8 ohm speakers together, two left, two right. In Bridge mode you may need an 8 or 16 ohm speaker load but sound will be mono and only available from one side of you speaker outputs

Posted on May 19, 2010

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SOURCE: My PMP 3000 is a dead stick. Help? We were

Please note that the outputs of the MAIN L/R line outs are TRS balanced. If you plug mono plugs into these or connect to mono device you MAY have a problem of grounding out half of the drive internally. ALSO please read my tip on here regarding a polarity hazard of speaker cables of PMP amps if you do NOT have Speakon to Speakon cables, but have Speakon to 1/4 inch cables.

Likely one of the power amps in this has failed If no lights come on the unit now, then the power supply is wiped out as well. It takes about $50 worth of parts and quite a bit of skill and work to restore the unit, including carving out burned board and re-insulating. Likely a feedback occured on that mic and started the whole thing. Supersonic feedback is something most musicians are NOT aware of, but if the feedback is above the range of hearing, the amps can be strained as they may go to maximum power trying to amplify the sound you can;;t even hear. Piezo tweeters are capable of frequencies up to 30KHz.

If this is under warranty exercise it immediately.

Posted on Oct 20, 2010

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SOURCE: you seem to be the

The MON faders ONLY control the output to the MON L and MON R jacks, NOT the split use of MAIN/MON outputs. You MIGHT try varying the MONO fader and see if it varies the MON part of the split output.
Best to use the unit as MAIN L and R to main speakers and use a stereo amp or POWERED monitors driven from the MON L and R jacks. With this, the MON faders will control your monitors as you would like them to.
ALSO make sure ALL equipment connected together is powered from teh same recepacle power system. Powering interconnected equipment from receptacles at opposite ends of the room is asking for damage due to ground bounce and faults.
PLEASE read my tip on here about a HAZARD of speaker polarity if you use Speakon to 1/4 inch cables.

Posted on Oct 29, 2010

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SOURCE: been looking everywhere for this... i just hooked

The JBL EON 305's are 8 ohm speakers. The PMP5000 wi;; produce 400 Watts per side into a 4 ohm load (600 Watts peak). Into your 8 ohm speakers, the peak current will be halved while the voltage remains the same so you ACTUAL power per side is 200 Watts. It is hard to know how much you expect to get out of the amp. This power would fill a venue of at least 2000 sq ft. If you need more sound, try borrowing another 8 ohm speaker for each side and parallel them with the EON's as a test. That will double the power and add 3 Db more of sound. Your main slider should be around unity typically. This amp is a class D switching type (very efficient) and runs on +/- 70 volt rails. giving about 45 volts RMS output. At 4 ohms, this is just over 10 amps giving 450 Watts... at 8 ohms this is around 5 amps or 225 Watts.

Please read my tip on Fixya about the ground hazard of channel A when using 1/4 inch cables out of the PMP units... essentially the BARREL of the connector from channel "A" is the HOT,... NOT the tip of the PLUG. Ground the barrel IN ANY WAY AND YOU FRY CHANNEL "A" AMP !!!

Posted on Jan 16, 2011

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