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Topic: JBL D130F Recone |
Ronald Lee White
From:
Richmond, VA, USA
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Posted 4 Jan 2006 12:52 pm |
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Can anyone tell me who I can go to get the voice coil reconed in a JBL D130F speaker? Although I used to play a bass guitar through it (it is mounted in an Ampeg B-15N) during the 70's, more recently I have been using a Boss reverb/delay with the Ampeg and playing an Emmons D-10 and a Fender T-8 through it. I have noticed a minimal background distortion when I play a full 8 or 10 string chord, even though the notes are clear.
Thanks, in advance, for any helpful advice. |
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Chick Donner
From:
North Ridgeville, OH USA
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Posted 4 Jan 2006 1:27 pm
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| Before running out to recone the speaker, look at the filter caps in that amp. Your description of symptoms sounds more like power supply than speaker. |
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Dave Grafe
From:
Hudson River Valley NY
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Posted 4 Jan 2006 10:09 pm
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As Chick mentioned, it may not be the speaker at all - try a different, speaker that is known to be good with that amp and see if the problem persists. If not, it's the speaker, if the problem still is present it's the amp.
In any case, if it really is a D130F then it won't stand up to a lot of bass playing at any significant power level - it's designed as a full-range guitar speaker and has a fairly light cone and very tight magnet gap, making it too fragile for regular bass use - if the cone isn't visibly damaged the coil itself is most likely be scorched or worse. "Scratchy" sounds that occur when moving the cone by hand don't mean anything as the cone will distort when pushed and rub the coil in the gap.
The D130F magnet itself is identical to the D140 and K140 bass speakers, if it has a heavy, ribbed cone then it has already been reconed to that spec, in any case it's definitely not the original speaker for that Ampeg.
To answer your question directly, any JBL warranty station (there should be one in Richmond, otherwise check in D.C. or NoVa) can put a new factory 8 ohm cone into it, which would be correct for use with the B15N.
One more note: Many steelers prefer 4 ohm speakers with solid-state amps because of the increased power availabile. JBL no longer makes 4 ohm cones for that basket so those have to be custom built by a good speaker tech - don't use a 4 ohm cone with the B15N, though, it will damage the output transformer in a hurry.
Good luck,
dg[This message was edited by Dave Grafe on 04 January 2006 at 10:10 PM.] |
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Chick Donner
From:
North Ridgeville, OH USA
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Posted 5 Jan 2006 9:35 am
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IF IT IS the speaker, then you want to contact Woody Woodell in Goodlettsville, TN.
(615) 851-7058
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Ronald Lee White
From:
Richmond, VA, USA
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Posted 5 Jan 2006 11:35 am
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Thanks Chick and Don, for your input. I will try the speaker by wiring it to my Sho-Bud amp tonight and see if it still has the background "scratchiness". Incidentally, this one is an 8 ohm speaker.
If it is not the speaker, I will probably take it to an electronic technician to analyze the caps. |
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