amp buzzing

[Callum27]

Whenever i hit 4th fret on D my peavey TNT plays the note but with a sort of hissing / buzzing noise, its really getting on my nerves. Any ideas what it is? i could send it back to manufacturer as its under warranty however i got it off the net so it would be pricey and impractical not to mention ive added wheels . Would it be possible to repair this at a guitar shop?

 

[FortunaBass]

It's most likely an issue of sympathetic vibration. That means the frequency you're hitting when you play 4th fret D (f#) is vibrating your amp at the same frequency increasing the amplitude (intensity) of that sound and making your rig noisey. Trying using a graphic EQ. Find the frequency and cut the dB on it.

 

[Callum27]

i hope thats the case

 

[Callum27]

no use ive tried messing with the EQ but it still buzzes on F# . the buzzing seems to be coming from the head :/. Also is it common on all amps to lose clarity and punch as you up the volume?

 

[jtc_hunter]

I bet the voice coil is bad in the speaker. Just recone the speaker. peavey speakers are easy to recone. Cost $60-80 depending on if it is a Scorpion or a Black Widow.

 

[Callum27]

i know mines not the BW but i've never heard the scorpion :S all i know is its less than a year old and its a TNT115s. is it normal for this to happen? and will a guitar repair shop do it? as my DIY skills are a joke

 

[jtc_hunter]

A. Take the front grill cloth off. Its held on by 4 velcro strips in the corners. 4 seconds total time.
B Use an electric screwdriver, or a hand one if thats all you have. large Phillips head. remove the screws from the speaker that hold it in the cab, (from the front)
C. remember which wire of the 2 speaker wires go on the positive terminal of the speaker (usually marked w/ a red paint dot.
D. remove the speaker
E. There are 3 bolts that hold the magnet onto the back of the speaker cone, take them out w/ a socket wrench.
F. Put the new speaker cone (kit you bought) on the old magnet and put the 3 bolts back in .
G. re-install the speaker the way you took it out.

If you have no skills at all, it should take no more than 45 mins.
otherwise just take it in . The will probably charge you $75 for labor and it will take them 10 mins.

 

[billfitzmaurice]

I bet the voice coil is bad in the speaker.

I doubt that's the case. If a coil is damaged it should sound bad all the time, not just with one note. The more likely scenario is a sympathetic vibration, probably within the amp. A loose bolt or nut, perhaps. Pull the amp from the cab and play it to narrow down the source. I'd want to be very sure that the driver is blown before spending money to fix something that isn't broken.

 

[jtc_hunter]

I had a speaker that only buzzed on my A string. Tightened everything and it still only buzzed on the A string. Reconed the speaker and it worked fine. It may or may not be the voice coil, but could be a possibility. Bill F. knows alot more than I do though, so heed his words.