Question about Prime 40 Watt 2 Channel Lead Electric Guitar Amp Car Audio Amplifier

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Amplifier sound difficulties

My amp is only giving a extreme low sound. You can barely hear it even when the guitar volume and amp volume are all the way up, at overload/overdrive mode! I tried a new amp chord but no use, what is wrong?

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When I turn on my marshall amplifier its makes this unusual, anoying sound. it sounds like a small motor or a fan going. the sound of the amp is good but its just makes this motor sound when I switch it on. can you help me find the problem.

Posted on Jun 04, 2008

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Posted on Jan 02, 2017

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Speakers have a crackle in the sound also rear speakers not working


can mean several things. The crackle is subjective and can mean distortion. Distortion most of the time comes out of the amplifier. Could be you have blown a capacitor in the power supply of the amplifier, making it work with quasi half the voltage. There is no need to change the polarity on a speaker, because when one is not working infuse, it won't distort the music. You only could have difficulty with the stereo sound. It could be a bit unclear where the sound is coming from and could sound a little less powerful.Check the speakers on a different amplifier, to hear if I'm right. Only if you switched on sound while the amp was giving full power, you could have blown the speakers, but most of the time they don't give any noise after that.

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Check its power amplifier circuit for the fault.

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The main amplifer ICs have taken a dump. Time to go shopping!

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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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Hello, well i just bought this week an MB4410 marshall and it sounds a lil bit distored even at low volumes and on the clean modern channel, i just wanted to know if thats how the amp should sound like or...


First make sure your guitar can't "hear" the amp as the sound can rattle the strings and have a form of feedback. Stand with your back toward the amp for example. If that doesn't help, take your guitar to the dealer and try it on another of the same type... see if it does the same. Also where you use it, make sure nothing is rattling in the area that can fool you as to how it sounds...

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2 Answers

Amplifier Screech at High Volume


What you're hearing is FEEDBACK caused by the nearness of the guitar to the amplifier speaker. Always mute it when not in use, or don't move it close to the guitar amplifier speaker when unmuted.

Usually, even though you hear a high-pitched screech, the problem is actually caused by low frequencies, sometimes below the human hearing threshhold (i.e., subsonic) because they are more omnidirectional and thus more easily easily can loop between input (the guitar pickup, especially on a hollow-body guitar) and output (the speaker). The screech frequency is determined by the distance between input and output, determining how quickly the output reaches the input (then loops around through the amplifier). Therefore, reducing the BASS a bit will often alleviate some of the problem.

This is basically the same type of feedback heard when a microphone is turned up too loudly or the mic is pointed at the PA speaker. Avoid those actions and your feedback will be minimized.

Only time and experience will allow you to automatically take actions to avoid feedback. I worked in the San Francisco Bay Area as a manager and sound man for rock bands and several nightclubs for 22 years. My college major was Physics (which includes acoustics).

Keep on rockin'!

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Hi Dan
I wish I could just say what to fix, but you can not do this at home. Line 6 is a great amp and worth the time taking it down to the music shop , to be looked at an give you a repair estimate. good luck keep on rocking in the free world. DFD

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I have two amps .i need to know how to set the knobs on them. to get the best sound out of them .i have a crate and a drive elite.i am a beginner. they are both bass amps. so PLEASE HELP ME

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