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Distortion on the Clean channel?

My Sons Peavey Blazer 158 amp has developed a fault. On the Clean channel you get significant distortion. All other aspects of the amp are fine. Is there a solution? Can I buy a replacement head for the amp? as it seems to me that the fault lies in the electronics of the head

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SOURCE: Loud distortion on Front Channels

Well, the nice thing about the newer amps is that the actual amp circuitry is all contained in a module and you don't have to do much troubleshooting. Just replace the module for that pair of channels. Bad news of course is the modules can be pricey. Should say right on it the part number, order it from mcminone.com or whoever, solder it in, use new conductive grease (many times I think these modules fail because the grease gets old, the module overheats and toasts) and you should be fixya'd

Posted on Jan 12, 2008

SOURCE: Onkyo TX-SV414PRO - Right channel has no audio, left channel works fine.

get a new receiver

Posted on Feb 10, 2008

  • 4234 Answers

SOURCE: Sound distortion on beomaster 3300

There is a defect in the pre-amp section of the unit. Without seeing it and taking a few measurements, I can't give you any particulars. A rough estimate for a repair wouldbe about $10-$25 in parts plus the local labor rate.

Dan

Posted on Sep 30, 2008

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SOURCE: We have a Peavey RQ4332C

Usually this is caused by a cellphone in the area. The cellphones send a signal to the cell tower ever few seconds, when they do that, it makes it sound like the wireless mike is losing its battery, when in fact, it is the cellphone interfering with the signal. A simple test would be to power up the system when you can verify there are no cellphones turned on and try the wireless system. Then turn the cellphone on and repeat the scenario.

Posted on Oct 23, 2009

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SOURCE: Loud distortion through phono inputs

Phono inputs are designed for turntables only. Any other device will provide too high a signal for that input to handle. The phono input has an extra amplification stage built in. The distortion is because of the high suignal level being supplied to the input. The only way to get this to work properly is to purchase an antenuator which will decrease the signal level to the phono level.

Dan

Posted on Dec 18, 2009

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I have a peavey 8600. will it run a pair of 600w 4ohm cerwin vegas?


Hello,

This is the amp capacity, 600W @4 Ohm, so you just have to drive them below full power to avoid excessive distortion, but certainly you will play a bit loud.

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Useing a Peavey XR 800F Powered PA Mixer/Amp which develops distortion on output after around 60 minutes. Also had gear linked to all inputs at the time, three mics, 2 guitars and keyboard. Any ideas...


First of all confirm if the speaker impedance is not lower then the recommended Ohms at the back of the Mixer speaker socket.You can use an 8 Ohms speaker on a 4 Ohms amplifier but not vise versa .
Next see if the fan on the mixer works. If not the Amp is getting very hot and this will lead to unwanted distortion. You can confirm if its a heat related issue by playing the mixer at low volumes for more than an hour and see if it distorts.

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Wires to main speaker are, Yellow & Blue witch one is the positive ?. Also I am getting distortion from the clean channel even at low volume, the speaker is Peavey 1230 model 8 ohms.


Yellow should be the positive. Try plugging in and reversing. The louder of the two is the one in phase and the correct wiring. If the speaker is pushing out when playing , it is in phase and correct also.
The distortion problem could be a speaker going out. It may not be totally blown, but may be verging.
Holding your hand out as wide as you can push against the speaker lightly. If there is a rubbing or scratching sound, the speaker could be damaged.If it moves freely, and there is no scratching its okay.
Another possibility is the clean channel may have a channel volume set to high. Make sure the clean channel volume is set lower than the master volume otherwise you can get distortion on that channel too.
Good Luck.

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Distortion on the lead channel is not working


The intergrated circuit is most likely gone out. Not much you can do, cost in repair is more than the amp. Check out the peavey vypyr, it's a great modeling amp for about $100.

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I have just purchased a tandberg 15.22 its in v good cond, no apparent head wear, I've replaced the belt (slow rewind) capstan is fine, there is distortion on the amp, I've cleane the record/amp/playback...


Resistors are good at causing distortion, you might spot one that has burned or broken. If the distortion is in both channels, which by what you say it is, then you might be looking for something common to both channels. Perhaps an IC.

Jan 21, 2010 | Audio Players & Recorders

2 Answers

My amp has 2 channels, clean and distortion. distortion works, but the clean channel doesnt. When i hit the button, it switches the distortion off, but there is no sound. The distortion light stays on...


initially you want to think bad solder joint, but it think its a bad mosfet or rectifier or diode. it would be hard for an untrained person to identify your problem let alone an experienced tech. it may be time to move on to another amp. in my shop it would be at least 65 bucks for the repair. so where did the "heat"/energy go from that point and what parts were affected. there may be a domino affect. burn one part, not usually.
yostamplifier.com

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The only thing I can suggest is you look at parts that are common to both channels in the main amp part. Perhaps an IC?

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Change the voltage from 240v to 120v


Hello,

Unless there is a 240/120 switch on the back, this amplifier cannot change voltage. The only way is to replace the power transformer, and when you do that you need to use the exact model transformer Peavey uses for the 120 version. I have also seen differences in handling power outside of just a different transformer for USA/Euro models.
The differences between these two market models might be beyond what is cost-effective to convert.

If it is the Peavey blazer 158, they go for as cheap as 100 bucks here in the states. Or buy one new for 120.00 bucks and 4.99 shipping: http://www.dcmusicstore.com/Peavey-blazer-158-guitar-amplifier

Best advice: sell it for what ever you can get and buy one here.

Hope this helps!
-mike

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Peavey Bass Amp TKO115s


Start with a clean setting - zero cut and zero gain on the Eq. Play a song close to the amp, and then move away, playing the same notes. Do you still get the distortion? Change lower the input gain and repeat the test. Lower the output gain and repeat. Are any outboard distortion pedals in the mix, such as overdrive? Eliminate them. Run straight through from your axe to the amp. Check for any distortion settings. Set everything including reverb to zero. When the distortion disappears, this is your base setting.
Change only ONE parameter at a time. When the distortion comes back, you have found your problem.+

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