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12-30-2012, 05:20 PM
|  | Registered User | | Join Date: Mar 2000 Location: Layton, UT | | | How Do I Check For A Bad Driver?
I have an inconsistent rattle in one of my SWR Goliath III 410s. I want to sell them but I want to fix first if there is a problem.
Running an Eden WT300 into 2 410s, either 4 or 5 strings, very inconsistent rattle, almost a scraping sound. No high volume used these days as it is a practice rig used in a 3 piece band.
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P5, 5/1, SKB 3005, CS '59 NOS P, Fender JPJ
CMD 102P + 102HF, LMII + TC 115 Composite
Xwire, Tonebone, TU2, Compressore, VV volume, Pedaltrain
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12-30-2012, 05:30 PM
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Originally Posted by Thumper I have an inconsistent rattle in one of my SWR Goliath III 410s. I want to sell them but I want to fix first if there is a problem.
Running an Eden WT300 into 2 410s, either 4 or 5 strings, very inconsistent rattle, almost a scraping sound. No high volume used these days as it is a practice rig used in a 3 piece band. | I replaced the Celestions in my BBII because the speaker lead the copper one from the lugs to the cone was touching the cone.
Made a brrr brrr sound like a blown speaker. It's okay. I discovered LDS long throws for the BBII & a Celestion went in the LA-8 which made it a monster. 
Last edited by chadds : 12-30-2012 at 05:50 PM.
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12-30-2012, 05:58 PM
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Originally Posted by Thumper I have an inconsistent rattle in one of my SWR Goliath III 410s. I want to sell them but I want to fix first if there is a problem.
Running an Eden WT300 into 2 410s, either 4 or 5 strings, very inconsistent rattle, almost a scraping sound. No high volume used these days as it is a practice rig used in a 3 piece band. | Put fingers out surrounding cone and push in. If you feel a scrape or roughness it's the voice coil. Needs a recone. Or just play it louder on a band that likes that kinda thing. |
12-30-2012, 06:31 PM
| | Registered User | | Join Date: Mar 2000 Location: Layton, UT | | | Ok I can check the leads and push in coils. I was hoping some kind of continuity or resistance check could be done
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P5, 5/1, SKB 3005, CS '59 NOS P, Fender JPJ
CMD 102P + 102HF, LMII + TC 115 Composite
Xwire, Tonebone, TU2, Compressore, VV volume, Pedaltrain
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12-30-2012, 06:36 PM
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Endorsing: Ampeg | | Join Date: Apr 2005 Location: Apopka, FL | | | My tech found the bad speaker in my 73 Super Reverb that passed the push-in test by plugging each one separately up to a sine wave generator with a freq sweep.
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Ampeg Portaflex Club #1
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12-31-2012, 08:14 AM
| | Registered User | | Join Date: Mar 2000 Location: Layton, UT | | Quote:
Originally Posted by JimmyM  My tech found the bad speaker in my 73 Super Reverb that passed the push-in test by plugging each one separately up to a sine wave generator with a freq sweep. | Thanks Mr M, but that is a little above my meager electronic capabilities/gear.
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P5, 5/1, SKB 3005, CS '59 NOS P, Fender JPJ
CMD 102P + 102HF, LMII + TC 115 Composite
Xwire, Tonebone, TU2, Compressore, VV volume, Pedaltrain
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12-31-2012, 10:27 AM
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Endorsing: Ampeg | | Join Date: Apr 2005 Location: Apopka, FL | | | Sounds harder than it is.
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Ampeg Portaflex Club #1
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12-31-2012, 12:17 PM
| | Registered User | | Join Date: Mar 2000 Location: Layton, UT | | | You are, of course, right. I think there are a few techs around these parts with the gear. I will check it out.
Happy New Year to all my Talkbass brothers & sisters.
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P5, 5/1, SKB 3005, CS '59 NOS P, Fender JPJ
CMD 102P + 102HF, LMII + TC 115 Composite
Xwire, Tonebone, TU2, Compressore, VV volume, Pedaltrain
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12-31-2012, 01:07 PM
| | Registered User | | Join Date: Mar 2006 Location: East Central Wisconsin | | | A meter will show you if the voice coil is still intact, but will not reveal voice coil rub. Sometimes, glue may let go on the cone (not your description) or on the spider (which could cause your symptoms.) The freq sweep is good. Playing low tones through the speaker alone, out of the box can often reveal the same.
I've repaired a lot of speakers that were rubbing due to the adhesive holding the magnet to the frame breaking loose. With all of them (10" Alnico speakers, and some 15" bass speakers) I could move the magnet slightly. In one position, the coil would rub. In the other it would be fine. I used an industrial ceramic epoxy forced between the magnet and frame and they were good to go.
Last edited by Steve Dallman : 12-31-2012 at 01:13 PM.
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12-31-2012, 01:43 PM
|  | Registered User | | Join Date: Aug 2007 Location: Toronto Ontario Canada | | Keep your eyes peeled - bad drivers are everywhere! 
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Paul
Last edited by BassmanPaul : 01-02-2013 at 01:58 PM.
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12-31-2012, 01:45 PM
|  | Registered User | | Join Date: Nov 2008 Location: Lake Havasu City, Az USA | | Quote:
Originally Posted by BassmanPaul Keep you eyes peeled - bad drivers are everywhere! | I know they get sent here for the winter
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Just call me B-String 2
GK Club #488 Big Cabs #175 Peavey Amps #92 50+ Club #44
Originally Posted by beans-on-toast
I told my manager that I wanted a regular gig. She told me to try prune juice.
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12-31-2012, 02:02 PM
| | Registered User | | Join Date: Aug 2007 Location: Toronto Ontario Canada | | Quote:
Originally Posted by B-string I know they get sent here for the winter | We call 'em Snowbirds!! 
Nah, that's not fair we older folk ain't necessarily bad drivers.
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Paul
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01-01-2013, 07:51 PM
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Originally Posted by BassmanPaul
We call 'em Snowbirds!!
Nah, that's not fair we older folk ain't necessarily bad drivers. | Our parents got around in one-wheel drive '40s Fords, etc. and they aren't still stuck in the snow......
Now I've heard some bad speakers in my time. Let's see...after Kennedy it was a sad show for awhile... | | Thread Tools | Search this Thread | | | | 
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