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Guitar amplifier cracks when turning off - Audio Players & Recorders

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So when you hit the power switch to turn it off you get a crackling sound? This is fairly common with many guitar amps as they don't have a relay which cuts the speaker output when the switch is turned off. What you are hearing is the capacitors draining down. If all else works ok with the amp then there's nothing to worry about.

Posted on Oct 06, 2008

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Hi having trouble when i plug guitar or mic into the neo. when i raise the trim to hear the input, the re is a big buzzing sound that just wont go away... any ideas?


Do you have any light dimmer in the house?
Are you using humbucking guitar pickup?
Do the the buzz change when the move the guitar around, it may be picking up radiate magnetic field from the transformers of the equipment.
The preamp is very sensitive with very high gain circuits that amplify signals in the millivolt range, so godd shielding and grounding is needed.

Dec 31, 2010 | Audio Players & Recorders

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The Encore 4050A is a guitar amplifier. It's going thorugh batteries verty fast and, although it has a 12V power input, I don't have the power adaptor for it. Have searched a lot but can find no...


It will be best to have a good 12volt/5 amps adapter that will suit your amplifier.There are many model with SMPS units. This will give a clean supply and all you need will be to make the connections with the correct polarity.
Double check when you connect as a wrong polarity can damage the amplifier.

Oct 28, 2010 | Audio Players & Recorders

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My Behringer gx212 ultratwin amplifier started to lose volume last night at band practice and then I smelled buring wiring. I think I lost or am in the process of losing the amp transformer. I think the...


Hi I just recently purchased a Behringer GMX 212 and had similar volume dropout on the clean channel only Channel 2 works better and has more punch in clean mode.I went to the shop where I purchased it with a 7 day warranty from some indian dude here in Nadi Fiji, and there was another GMX 212on the floor so I decided to try it out. This was a new amp. I plugged into the clean channel and turned it up full volume on guitar and amp adn heard the volume drop of in the amp in almost a curve and then the whole amp just cut out. We unplugged and waited, turned the amp off, and then on and stil no sound. We then tried the guitar and cord in another amp. The other amp was fine. Can you solve this problem.......my gut feeling is this happens a lot to Behringer amps.

May 08, 2009 | Audio Players & Recorders

1 Answer

Schematic for guitar amplifier


You didn't mention the make and model of the guitar amp, so I'll leave a link for several amps:

http://www.prowessamplifiers.com/schematics/

Enjoy!

Nov 25, 2008 | Audio Players & Recorders

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MY FENDER GUITAR AMPLIFIER IS MAKING A HUMMING BUZZING NOISE


Not sure yet, but before considering a fault with the amp, does it only make this humming noise when not plugged into the guitar? I am thinking that the cable might be faulty.

If it while the cable is plugged in the guitar, does the humming disappear when you turn the volume control(s) down on the guitar? I am thinking that one or pickups may be faulty.

Sep 14, 2008 | Audio Players & Recorders

1 Answer

No sound from my Marshal Guitar Amp


Your Ic audio amplifier maybe is damaged

Apr 13, 2008 | Audio Players & Recorders

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A HUMMING Peavey Classic 30


I repaired a classic 50 recently and the problem was a bad solder connection on the main input jack. You may also want to have the tubes tested.

If the unit is over 20+ years have it recapped.

I do this stuff but Vermont might be to far.

Scott

Mar 17, 2008 | Audio Players & Recorders

1 Answer

Yamaha RX-V490 Amp


The easy answer...

Absolutely NOT.

This is by all means a standard receiver. It in itself is an amplified unit. You would have to run the speaker ports to the input ports on the second unit.

If you do that, you'd have all kinds of problems. The most likely one being that you'd simply overload the input ports on the other unit.

It is never a wise idea to amplify an output signal into another unit that is just going to amplify it again anyway.

The bigger thing to keep in mind is that the input ports on the second unit just are not designed to take that kind of wattage. They're designed to take a few mW to a few W at most. Y'know?

I realize it's called an "amplifier" and all, but it's only meant to amplify the source signal to a level where it's audible through speakers.

A 'true' amplifier is meant to amplify a signal into a high-power monitor; such as a guitar amp, etc.

Please don't try to do this. I'd hate to see you lose a perfectly good receiver to something like that! :P

Good thinking, though. At least you're thinkin' up ideas on how to improve something. :)

Cyryl

Nov 10, 2007 | Yamaha RX-V490 Receiver

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