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Bass players-Did I wreck my bass amp?
Posted by: Black
Date: October 25, 2009 10:50PM
I've got a big old Peavey bass amp (a TNT 130) and I had a little fumble while turning it on (didn't realize the guitar end was hanging free) and it bzzzt'd and popped a few times . . . now there's a pretty serious rattle, but it's only within a range of 1 1/2 steps centering around the A string . . . if I blew the speaker would it rattle, and would the rattle show up only within such a narrow range?




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Re: Bass players-Did I wreck my bass amp?
Posted by: Joey Cupcakes
Date: October 26, 2009 12:47AM
It could, yes. More likely that it's the speaker rather than the head.
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Re: Bass players-Did I wreck my bass amp?
Posted by: mikebw
Date: October 26, 2009 07:15AM
Sounds to me the like voice coil is rubbing against the magnet. Over time the suspension on a large woofer can sag causing this to happen regardless of usage. Try removing the speaker and rotating it 180 degrees in the cabinet, or if the magnet part on the back of the woofer is removable (if it's a Black Widow speaker it is) you can try unbolting it and rotating that instead, but either way you would need to take of the fabric grille and unscrew the woofer from the cabinet.
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Re: Bass players-Did I wreck my bass amp?
Posted by: Black
Date: October 26, 2009 08:02AM
Quote
mikebw
Sounds to me the like voice coil is rubbing against the magnet. Over time the suspension on a large woofer can sag causing this to happen regardless of usage. Try removing the speaker and rotating it 180 degrees in the cabinet, or if the magnet part on the back of the woofer is removable (if it's a Black Widow speaker it is) you can try unbolting it and rotating that instead, but either way you would need to take of the fabric grille and unscrew the woofer from the cabinet.

Will definitely try that, thanks. Would also like to know what's in there now so I can make sure whategver I replace it with is at least as sturdy; all the replacement drivers I'm finding on the nets list a total weight of 8 lbs (?)- would think you'd have/want a monster magnet on there.

Anyone know if I'm good with any 8-ohm, 15" driver?




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Re: Bass players-Did I wreck my bass amp?
Posted by: Black
Date: October 26, 2009 08:04AM
Quote
Joey Cupcakes
It could, yes. More likely that it's the speaker rather than the head.
Thanks, that's what I think too-- although I find it wierd that it's in such a narrow range of frequency . . .




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Re: Bass players-Did I wreck my bass amp?
Posted by: mikebw
Date: October 26, 2009 08:44AM
Quote
Black
all the replacement drivers I'm finding on the nets list a total weight of 8 lbs (?)- would think you'd have/want a monster magnet on there.

Anyone know if I'm good with any 8-ohm, 15" driver?

While any 8-ohm, 15" driver would "work" specs vary widely and unless you found a very similar replacement the frequency response would be all wrong, and you could end up with a blown speaker in no time.

You should investigate what the actual driver is in the cabinet (the speaker part) and then find out what the T/S parameters are (Thiele-Small). From that you can find a good replacement. T/S params are standardized specs that should be documented with any speaker.

Probably the most important aspect to look for is what volume (displacement) the driver is designed to operate in, and whether or not the cabinet is vented or sealed.
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Re: Bass players-Did I wreck my bass amp?
Posted by: Lux Interior
Date: October 26, 2009 08:46AM
Did you turn it up to eleven again?
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Re: Bass players-Did I wreck my bass amp?
Posted by: Wags
Date: October 26, 2009 09:50AM
Stick in a Black Widow 15, then get a hand truck to move it around.
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Re: Bass players-Did I wreck my bass amp?
Posted by: prof
Date: October 26, 2009 10:23AM
Just bought this to replace a blown Peavey 15"

[accessories.musiciansfriend.com]

Pretty pleased with it so far. Got it for $100 during a 20% off sale.
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Re: Bass players-Did I wreck my bass amp?
Posted by: Black
Date: October 26, 2009 01:51PM
Quote
prof
Just bought this to replace a blown Peavey 15"

[accessories.musiciansfriend.com]

Pretty pleased with it so far. Got it for $100 during a 20% off sale.

Wish you hadn't told me what you paid-- now I'll be stuck until I can find one at the same price.




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Re: Bass players-Did I wreck my bass amp?
Posted by: prof
Date: October 26, 2009 02:46PM
Found it for $110 here: [www.zzounds.com]

But you might do better by taking advantage of The Woodwind & The Brasswind's low price guarantee here: [www.wwbw.com]


edit: Actually the 20% off sale at Musician's Friend might still be on.
call their 800 number and use code OCT20. Worth a shot



Edited 1 time(s). Last edit at 10/26/2009 02:49PM by prof.
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