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My Marshall G80R CD Amp 80W Amplifier is experiencng some difficulty. When I am playing it at concert volume, using a Zoom 1010 effects pedal, it keeps massively reducing volume and losing effect. Each time I seem to do a different thing and it goes back to its original sound. I am playing it through a fender squire stratocaster.

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5 Suggested Answers

techman
  • 3130 Answers

SOURCE: Losing volume on channels

I am afraid not. That crackling is a component in one of the solid state amp circuits starting to fail. These are all soldered into the printed circuit board. This could be a difficult repair to find an intermittant component. Depending on how old the unit is and how much it cost will factor in on if you have it repaired or not. Rule of thumb is that if the unit is two to three years old and cost less the 200 to 300 bucks you should not invest more then 100 to 150 bucks into it. Good Luck

Posted on Mar 16, 2007

larry james
  • 286 Answers

SOURCE: Reduce output

make sure your tape monitor switch is not on.

Posted on Sep 18, 2007

SOURCE: Yamaha DSP-A2070

Check the 'front mix' switch on the back, set it in off; main level on max.

Posted on Sep 10, 2008

Scott Ellin
  • 558 Answers

SOURCE: I've had a Pioneer SX-R9

Hi there,
The general fault come up with the AV recievers is:
My A|V receiver says, "OVERLOAD" and shuts off, what should I do?

Poor wiring connections, bad wires or a bad speaker may cause this. As you increase the volume, you will increase the amount of current you are drawing from the receiver. To troubleshoot this issue, try the following:

1. Disconnect each speaker wire connection. Inspect for any frayed or damaged wiring and replace it.
2. Check the impedance of the speakers; make sure they are properly rated for your stereo. In most cases, they need to be 8 ohms. Only a few Pioneer receivers will support lower impedance.
3. If the problem still continues, try these steps:
1. Turn the receiver off.
2. Remove one speaker.
3. Turn the receiver on.
4. Increase the volume.

If the receiver overloads, repeat steps 1-4 (selecting a different speaker each time). If you disconnect a certain speaker and the receiver no longer overloads, have this speaker checked at a service center. It could have a bad speaker component, like a tweeter, sub-woofer, or even a bad crossover.


Regards
Ellin

Posted on Oct 01, 2008

  • 1 Answer

SOURCE: Low speaker volume for B Side Speakers...

burn radio output

Posted on May 13, 2009

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2 Answers

Low volume on my marshall


I am very new here and don't know how to answer a question to a specific problem so I will write about the most common problems that I have had over the decades doing guitar amp repairs. If you find that your amp is extremely low in volume and then suddenly comes back to normal- check out the effects return [or power amp in] jack. Especially in Marshall amps-these corrode and your signal dies. If there is loud noise such as hissing and crackling with no guitar patch cord in the input jack- the input jack is likely at fault. They normally have switching contacts that ground part of the input circuit when the 1/4 inch male plug is disconnected. When this in is corroded or too weak to make normal contact, you can get these symptoms. If your amp is a solid state Marshall or Fender and there is a random buzzing sound with no guitar signal connected- hit the side of the amp and listen for the buzz to go away or become louder-if it does, this usually means that the connections are loose at the two large filter capacitors. In one or more Marshall amps, they use a filter circuit in the low voltage power supple for the preamp tubes. If you encounter a dead Marshall[the model escapes me now] remove the circuit board and resolder the four connections at the bottom of the bridge rectifier. If you have any other amplifier repair questions you can email me direct at computerlen@hotmail.com.

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Yes the output jack socket can be used either to:
  • plug in a set of headphones for personal listening / practice
  • to connect to an amplifier.
The zoom pedals use either a mono or (tip and sleeve) or stereo (tip, ring. sleeve) 1/4 inch jackplug - i.e a standard guitar lead.
You should plug it into a line-level or high impedance socket on your amp. With the pedal in play mode you can adjust the output level (gain) to match the input requirements of your amp by rotating the 'Value' knob (top right)

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Something doesn't add up. You mention two connections to the speakers - CA-9335 and a "simple jvc cd player". Is that true? If so, you might want to UNconnect the CD from the speakers and run it into the receiver where it belongs. An amp isn't designed to share the load with another live device; or even have electrical contact with anything BUT speakers.


Did you actually find documentation that supports this hook-up? Or just winging it?

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