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Sound quality changes from time to time losing tone and the great sound before

My name is Robert Andrews and play regularly in church.I love my amp and have never overcranked.Sometimes it just seems to loose its tonal quality and kinda looses its presets without touching anything.I know it has a built in circuitry that supposed to keep everything sounding normal .I cant think exactly what the term used is but its in my book and i cant find it at the time.Theres nothing inparticular that is going on when this happens but it is urely noticeable when it happens.Sometimes it goes away quickly then other times i find myself readjusting to try to get my original sound.It just kinda looses its highs and its efx to an extent,hardly no vol. problems.I plat through a takamine supernatural with cool tube.Does the same with my others.Sometimes it wont happen for a month then couple times in an hour.Could someone please help me.All chords are top notch and have been checked Thanks praisethelord316

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  • praisehim316 Sep 29, 2008

    i have a peavey 112 ecoustic 125 watt efx amp.IT looses tone and its quality sound from time to time.It might do it every time i play or not for a month.It has built in effects and 10 in. woofer and 2 in. tweeter.I usually end up trying to get my great sound back by adjusting, but doesnt really help then it goes away.Ive been told to check back-up battery buti dont think it has one if it does, where is it?Ive checked chords and guitars.Not that. Please help if you can.Thanks Praisehim316.

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Hi Robert

So you got problems with your acoustic/electric/peavey rig There a few things to check first, you may already have tried most of them, but here's a check-list to help narrow down the source of the problem.

  1. Have you checked the battery in the Takamini, by that I mean been able to replace the battery at the time of the problem/solving it? If you have a multimeter, check for freshness. Anything that has a voltage of less than 8.5 volts should be discarded and replaced if you do not wish to see sudden failure half way through your gig. The preamp is using battery energy the whole time if has a jack plugged into it.
  2. Same thing goes for FX pedals and stompboxes. Digital Battery powered devices use up heaps of batteries. Pays to use an approved regulated power adaptor,or fresh battery before every performance.
  3. Leads you say you have already checked. Best way to do this is just replace the lead, or try with another. If you get caught mid performance with a noisy jack plug that crackles a lot, just quickly give the plug a ****. The contact will improve for the gig, but STILL NEEDS ATTENTION LATER.
  4. Noisy controls on the Preamp section of the guitar. Often crackling, or cutting out. If they do, cleaning them with contact spray will make them bind. You need to try tube spray burst of electrical contact treatment grease from Electrolube. It may still now resolve the problem. Replace the preamp.
  5. Some occasions in 4-5 year old plus guitars, the SMD capacitors in the preamp will fail, but this is generally more synonymous with a progressive reduction in performance,rather than an intermittent problem that you seem to be experiencing. When they do go, they leak electrolyte all over the PCB and corrode everything :( I recommend just replacing them.
  6. Same thing goes if you may have had a battery go bad in the guitar. If it has leaked into the circuit area, it will need immediate attention, or even eventual replacement also.
other than that, it may be an
  1. intermittent electronic fault occurring in the amp, The amp will need a techs attention expertly heating and cooling the amp in sections to aggravate the fault and localise what work needs to be done. Mechanical and electrical stress may also be used in the form of Poking and prodding, or hard yakka into a dummy load to put some electronic hardship across its existence. This may be as simple as some resoldering of poor or Dry solder joints, replacing some capacitors that fail with age, to being a more complicated repair that needs total attention for several hours to pin down the problem :) That's where guys like me come in to fix it for you.
  2. Or vary rarely a loudspeaker failing, or a foreign object in the voice coil magnet gap, polling the voice coil. This unit has a Black Widow type speaker that can be dismantled by the user and the voice coil gap cleaning with a piece of masking tape bent over a stoat business card and rotated in the air gap a couple of times, or at least till clear. Inspect the voice coil and former for any abrasions and burning at this time also. This job is sometimes best left to the expert also, and seeing as how the electronics are more likely to fail than Peavey's super reliable classic Black Widows, the would be a last resort to try and locate a stubborn intermittent sound problem.
What I have suggested are some of the things to consider when you have an intermittent sound problem. Feel free to use the ASK feature to follow up if you want more advice on your problem. :)
If you think I have done a god job addressing your problem, a FixYa is a great rewards. Thanks mate!!

rock on!! ;)

regards
robotek

Posted on Sep 30, 2008

  • Graeme Ross
    Graeme Ross Sep 30, 2008

    whoops, I need to correct a small error in recollection:) Your amp does not use a Black Widow driver, but a coaxial type, If you believe the speaker to be at fault, you will need to seek and experts attention here also.

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How long can you hold out for one of our real electronic techs to get wind of this problem you posted. I'll make an effort to reach one or two and have them come in on this problem.

Does that sound worth waiting for?

Worldvet

Posted on Sep 30, 2008

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Please replace Back-Up Battery in unit, if any.
or give model and brand of suspected unit.

Posted on Sep 29, 2008

  • Shahid Electronics
    Shahid Electronics Sep 29, 2008

    I would suggest to spray small amount of WD-40 Contact cleaner in its controls to work smoothly.



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Internal circuit problem

Posted on Sep 29, 2008

  • tech gurus Sep 29, 2008

    some solderings could be loose in the circuit so causing you this problem.get it resoldered firmly and then try it will work.

  • tech gurus Sep 29, 2008

    or you can just get dry soldering done on each and every soldering joints.this can be done by any local mechanic who can disassemble the unit and who knows how to use soldering machine.

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