Why does my amplifier make noise when I plug in my guitar?
There may be a coupling capacitor in series with either the output of the guitar pickup or the input of the amplifier (or at both locations). Before you make the connection, there may be a slight charge on either (or both) of these capacitors such that the dc voltage at either the guitar output or the amplifier input is not exactly zero. When you make the connection, this voltage difference has to disappear, and it does so with something like a thump or a click. If this is a real problem, perhaps connecting shunt "bleeder" resistors to ground at both the guitar output plug and the amplifier input plug will provide a solution. Or one of the circuits (guitar or amp) may already have a dc path to ground, in which case only one such bleeder resistor may suffice. If, on either end, there is some active circuitry >forcing< a small dc offset at the plug point, the solution to your problem is slightly more complicated, involving the addition of a suitable series "blocking" capacitor to neutralize this offset. In some cases, the poor design of the connector itself is such that when the connection is made, the signal path makes the connection before the ground connects.
Microphone stops buzzing when I touch my computer?
i tried unplugging all my other usb's and everything hooked up to the power strip to no avail. I also tried moving far away from my computer but that did nothing either. even when the headset wasn't on my head, the buzzing persisted. I then remembered that i'm living in a pretty old house right now which only has 2 prong'd outlets. I'm using a 2 (to) 3 adapter on the outlet, therefore providing no ground to my power strip. Do you think that is the problem?
Why does touching the jack of my speaker make noise?
It is called 60Hz Hum.Your body becomes connected to the circuit. Probably, capacitively coupled through an equivalent of about 100pF. Then, several things can happen:Extra capacitance makes your amplifier oscillate.Your body acts picks up 50/60Hz interference from power lines (aka "60Hz hum") and introduces it into your amplifier. To see this, poke an oscilloscope probe at yourself and observe the signal.Hope it helps.
Why does my guitar give off a buzzing noise if I am not touching it? It stops as soon as I touch the strings or anything metal.
electric guitar amplifiers have high input impedances. they are prone to picking up random noise.a lot of the noise comes from the fact that most guitar manufacturers have just been copying the same old designs for years with no regards as to noise…its become fairly normal to have a buzzy guitar…when it isnt being touched.touching the (earthed) strings raises the capacitance and shunts the buzz off to earth… its weird, ok!single coils will always be worse. you can get a single coil to pickup radio stations by tweaking the controls a bit… youre making tuned resonant circuits, just like a crystal radio.all the metal parts on the guitar should be earthed, so yes. it goes away when you touch the strings.how to fix it? by redesigning the amplifier!easy if its tube, but if its solid state. ouch. that stuffs downright evil…and what you have to do depends on the amp itself. 90% are much the same, but theres always a few oddities out there!if the noise isnt going away when you touch the guitar, thats when you have actual issues worth worrying about.unplugging the lead from the amp should make it silent. standardly the input jack shorts itself to ground. any noise present now is induced in the amplifier itself. faulty components, bad power supply, earth loops…unplugging the lead from the guitar should also make it quiet. tap the tip of the plug, it should buzz. tap the earth…nothing, generally. tap both at the same time… nothing. tap the lead and you should hear a click from the amplifier… maybe even a crackle as you shake the lead around…basically, what you have at the moment is normal. especially if its a cheap amp and guitar!
Speaker noise when I touch the plug to myself?
Okay. So I just noticed that if I unplug my computer speakers from the computer, but leave them on, and then touch the audio plug to my skin, it makes a buzzing noise come from the speakers. This also seems to happen with any metal object. But what caused that, was that my skin conducting electricity or something?
How come my guitar amp buzzes?
If your guitar has single coil pickups, this is fairly common. Single coil pickups are susceptible to interference from all kinds of sources...including your amp. When you add effects like distortion, all that buzz gets amplified. That's how distortion works: it boosts the input signal and overdrives the preamp. Any buzzes get boosted right along with the music. I suspect that the buzz is always there to some degree, just not so disagreeable until you crank things up. Sometimes the buzz can be minimized if you stand farther from your amp, or at a slightly different angle. Your strings will act like a directional antenna. Other times the interference is from outside sources that can't be avoided: fluorescent lights, poorly grounded house wiring, etc. The only solution I know of is to replace your pickups with noiseless single coils or stacked humbuckers. Humbucker pickups can be noisy too, although usually to a lesser degree. If your guitar has humbucker pickups and is buzzing there are a couple of things to check. A bad ground in your guitar or cable can create buzz. Typically this will minimize when you touch the strings and get louder when you take your hands off. No matter which type of pickup you have, try plugging your guitar directly into the amp...no effect pedals. Put the guitar volume up full and listen for any buzz. If there is noise, experiment with swapping cables and spraying contact cleaner into all your switches and volume/tone pots. Work on minimizing the noise on the guitar while it's got a clean sound. Then, when you add distortion, you can hopefully keep the buzz under control.
Why does my guitar amp make a constant noise?
Amps can make all kinds of noises. The noises can range from defective wires, cracked speakers or unsoldered electrical components as well as external interference from devices like computers, neon lights and ground problems.Looks like you will have to troubleshoot the problems and eliminate each one of the possibilities that could be causing your problem.It would be wiser to start your testing in an area where you don't play guitar. This should eliminate all external interferences.I recommend you first start by plugging in your amp without any jacks or wires connected to your pedals or guitar. Turn the amp on and listen to see if the noise is still there. If the noise is still there, it's best to bring it to get it evaluated for repairs.If no noise, you will know that the amp is good.The next step is to use a good jack and plug in your guitar to see if there is noise. If noise, try another jack or if you can borrow another guitar plug that guitar into your amp and check for noises. I hope this helps. Good luck.
How do I avoid the popping sound my speakers make when plugging my AUX cord into my laptop?
I had a problem with crackling when plugging in and then constant buzzing with the laptop charger plugged to mains. My hacked solution was an extra grounding cable from the amplifier’s metal frame to the laptop’s VGA-output’s D-frame/shield. The 15 pins are not connected.The problem is caused by the 3.5mm jack’s faulty design. When plugging in, the amplifier’s left input gets hit with static discharge and ground leak currents from the laptop’s frame.Ground should be both at the tip and the base so that it would be the first to touch and eliminate the pop, not just at the base as it is. When designing connectors, ground should always be the first to connect and last to disconnect. The above VGA/HD15 does this correctly.How the audio jack should have been designed (at the very least):
I'm not getting sound to my speaker from my amp. The amp lights up and it's on, everything is brand new so it shouldn't be blown. Any help?
Check different inputs (tuner, CD?) for any sound, listen for even a hiss from a tweeter or a slight "pop" when you turn on/off the amp. If there's no sign of life at all from either speaker, you might try plugging headphones in to see if there's any sound at all that way. There are sometimes multiple speaker jacks on the rear for A/B speakers, make sure if they use bare wire connectors that there are no strands of wire shorting between any of the connections and that bare copper is connecting into the connectors tightly. Wiggling them a little can help find iffy connections there. A tape monitor switch on the front panel, if switched on, will keep any other audio (like tuner, CD) from getting to the amp except as crosstalk, (a very faint musical signal). Check the wires at the speakers as well, and hook up the speakers to any other amp just to confirm that they're not broken. If all this fails, you might actually have a dead amp section (can happen from even a momentary wire shorting at the speaker connecters) even if the amp lights up and CDs act like they're playing. There are sometimes speaker switches on the front for A or B speakers, obviously if it's on the wrong set nothing will come out.You should consider photos of the front/rear panel or model numbers or some such for better advice. Also, if it's brand new, take it back where you bought it, and make them prove that it works and have them replace it if they can't get it to work! Or call the company with proof of purchase to fix it or replace it. Warranties are useful!