Question about Peavey Xr 8600 8 Channel Powered Mixer

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During performance, the monitor channel started giving loud noises and no music anymore. The mains channel was playing normally. 15 minutes later, the unit started giving a burned smell and I switched it off. Eric Blom

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  • Peavey Master
  • 5,603 Answers

Likely a failure of one of the amps and now more... You should have shut it down when it started making noises. This is NOT a DIY repair. Take it to a competent repair shop for service.

Posted on Oct 11, 2010

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Posted on Jan 02, 2017

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My TH-15A starts making VERY loud crackling noises after a few minutes of being turned on. It does not matter if an XLR cable is plugged in or not, and the volume control does not change the volume of the...


buy a canister cold spray and spray on some active components if the noise begins You have a thermical failure in a component on the board can be faltering resistorcircuits or resoldering some active components.

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Mixer Switch on and after a short period theres a noise that sound like a machinegun and a Hiss sound through the speakers


I assume that the power-amp is good.
This noise, of course due to defective parts inside.
But, which section is it? Chances are:
  • Amplifier circuit in the Main-Outputs. If the MAIN MIX in the minimum position and still noisy, then the damage in that section.
  • At one or several channels. Let's test.
    Set to minimum volume for all channels and MAIN MIX. EQ=flat. FX=minimum. TRIM at half (let's try at 12 o'clock).
    Raise the MAIN MIX, let's say at 15.
    Gently, raise channel 1 volume to maximum, listen, if there is no noise, channel 1 is safe. Lower the volume to the minimum again. Move to another channel in the same way.
    If found noise, that is where the problem is.
Actually, many more detailed steps for testing, but the description is too long. This above is a simple way.
Circuit power supply should also be checked, whether all normal voltage.

mixer-switch-after-short-period-theres-imlh0v44wkwtg1kaqtxpxnrr-2-0.jpg

mixer-switch-after-short-period-theres-imlh0v44wkwtg1kaqtxpxnrr-2-1.jpg

It is part of the image of the amplifier section circuit.
Parts which may be broken is the IC 64,65,77.

Sep 13, 2015 | Behringer XENYX 2442FX Mixer

1 Answer

Starts playing fine. After an hour, why does sound give way to a loud buzzing?


If it goes back to normal after you shut it off and letting it sit for a bit, it's related to heat buildup. If that's the case, it's either a component failing or a cold solder joint that opens when a part expads/contracts from itr's contact point. Either way, you needto take it to the repair shop.

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1 Answer

When setting up xr8600 is it best to start mains and monitors master at 0DB?


1. Turn the main and monitor volumes all the way down (off). Plug a cd player into channel 9/10 and play a track of music of your liking. With the main/monitor volumes still off, adjust the gain on 9/10 until the clip light turns on, then back it down until the clip light just turns off. Put the channel volume at 12 o' clock.
2. With the music still playing, turn up the mains to the desired listening level first, and then adjust the graphic eq until the music sounds good in the room. Remember or mark the position of the volume control. Do not use the channel eq on 9/10 for music that has been mastered properly, leave the eq flat. Once this step is completed then you have now set the main eq.
3. Repeat the same for monitors. Turn off the main volume and then bring up the monitor main volume to the desired level first, then set eq. Now your monitor eq is set properly. Remember or mark the position of the monitor volume.
4. Set up microphone - plug a mic into channel 1 with volume all the way down. Speak or sing into the microphone and adjust the GAIN until you see the clip light, then back down a litttle on the gain. Put the monitor and main volumes back up to the mark from step 2. Now adjust the volume and monitor send on the mic channel to the desired loudness first before adjusting the mic channel eq. Use subtractive eq method to minimize distortion and feedback. ...i.e. if the mic is bassy then turn down the lows, do not ADD highs. If the mic needs bass, turn down the highs.

Jun 08, 2014 | Peavey Xr 8600 8 Channel Powered Mixer

1 Answer

Behringer Eurodesk SX2442FX Interface communication issues


With all your plugging in of unsuitable stuff into sockets not designed for them there is a very good chance you'll have blown parts of the mixer. It is apparent you have little idea of what an insert is or the difference between a line and a mic in (or between an in and an out for that matter) I would strongly suggest you stop playing and probably causing damage, read the manual from cover to cover, and if you don't understand it find someone who will help you. I'm sorry but you really are not helping yourself at the moment.

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1 Answer

Behringer Eurodesk SX2442FX Interface communication issues


It seems you are getting confused by In and Insert. An insert is a plug where you can create a break in the audio chain and 'insert' something, normally an effect. This is why when you plug something into the insert socket you break the chain and lose the output. It is expecting the signal sent on the top to be returned on the ring when you plug it in and when nothing is plugged in the tip and ring on the socket are shorted. I am not quite sure what you are trying to do despite your detailed description but all you describe seems to be about right if you have got mixed up about inserts.

Hopefully if you are trying to insert something in the audio chain as I think you are and once you properly understand an unbalanced insert such as your unit has you'll be able to figure it out.

Do please stop plugging stuff in and half in that is not designed to be plugged in, or if you're unsure still don't plug it in, from what I can see you're really tempting fate and quite likely to break your unit with what you're doing at the moment.

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1 Answer

I purchased a pair of Hs80m. I am having a problem with one of them. The monitor works fine for about 10 mins. After about 10-15 minutes the monitor will make a humming sound then eventually blow out. The...


The powere amp portion is LIKELY going into thermal runaway where one side of the pushpull driver shorts out drawing heavy current to the point you can hear the ripple (hum) probably followed by fuse blowing. You need to have that unit repaired. Replacing fuses MAY be causing further damage.

Chances are IC601 or IC602 (LM3886TF-2) are defective or something in the DC feedback circuit.

Here is the service manual: http://elektrotanya.com/yamaha_hs80m_hs50m.pdf/download.html

Of the two, IC601 is the most probable as it drives the woofer. Available...$7.30 from

http://search.digikey.com/scripts/DkSearch/dksus.dll?lang=en&site=US&WT.z_homepage_link=hp_go_button&KeyWords=lm3886

Jan 09, 2011 | Yamaha HS80M Powered Monitors

1 Answer

When I hook up my passive mains and monitors in the mono1/mono mode....mains on B and Monitors on A outputs I don't seem to have much output volume on the mains.....my monitors are okay but main sliders...


Please read my tip on fixya regarding a HAZARD of PMP mixers when using Speakon to 1/4 inch speaker cables. Essentially, the barrel of the 1/4 inch on A channel is the "hot" and one had better never let it touch a grounded point.

Now to your problem...You may have to run the MAIN sliders near the unity setting (zero Db).

It is important to set the trims correctely. For each of the inout channels, push the PFL button for the channel down and set the trim control so LED display is just below the clipping point at maximum input for the channel.

Ideally you would like the channel sliders to be in the vicinity of unity gain when system is balanced. Running the sliders way down results in a poor signal to noise ratio. Next you adjust the channel monitor knobs to set the monitor mix. These should be about 12 o'clock if possible to get decent signal to noise ratio.

For the MON/Mon1 mode, do NOT use the "Surround" simulator OR the "Speaker processor" ... make sure those swithces are off. You will probably want to PAN the channels fully to the MAIN side "B" which MAY be the reason your level seems low.

Remember the individual channels are about 400 Watts and 600 peak. Frankly myself I prefer to use both MAIN channels to the main speakers and use an external amp for the monitors OR use powered monitors for monitor use.

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1 Answer

I have a crate fxt 120. I 'll be playing in the #2 overdrive channel and it will automatically fail and go to a clean sound. Although it is not entirely clean. It sounds like 2 sounds combined. A loud...


A possible problem MIGHT be marginal switch contacts on the external foot controller cable. If you are not using the foot pedal, these contacts must maintain contact to keep the same channel selected.

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1 Answer

When I'm playing on my amp there is a strange noice coming out of my amp. At first I thought it was my guitar, but it is really my amp... does anyone know how to solve?


"A strange noise" does NOT give us much to go on...

Please note that relatively low volume digitizing noise often exists from teh digital effects processors... it should be well below the normal playing volume.

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