View Full Version : Jbl le8t-2 help !!!
Today the new foam surrounds arrived for the above as the old ones had perished.
(Walpurgis was very kind in guiding me )
I had meticulously cleaned all the old foam and glue off and handled these like wet tissue paper.
Once they were well dry I set about installing them back into their cabinets...then nothing!! Sweet fa from them [emoji22]
So I removed them once again to test them and to my horror it wasn’t the crossover but it’s the drivers , thing is they worked fine before ( see photo )
Now I have seriously handled these with great care so I’m baffled ( as is Geoff )
ANY IDEAS anyone ?
Apart from telling me that they’re F€>#%>% [emoji16]https://uploads.tapatalk-cdn.com/20180607/3f2dff51dbccf6c10b81e10eefc0158c.heichttps://uploads.tapatalk-cdn.com/20180607/512a631832cf0197a8609bf927661d44.heic
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Bigman80
07-06-2018, 16:53
Pics don't work
Don’t know why they seem ok on my phone
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Are they open circuit. If not are they connected correctly. If that's ok the are the voice coils free
walpurgis
07-06-2018, 17:44
Are they open circuit. If not are they connected correctly. If that's ok the are the voice coils free
They worked before the new cone surrounds were fitted. Hard to think what may be going on. Maybe the lead out wires from the cones failed. It seems odd that both units have seemingly packed up.
Have the drivers been connected directly to an amp to test them yet, ignoring crossovers?
They worked before the new cone surrounds were fitted. Hard to think what may be going on. Maybe the lead out wires from the cones failed. It seems odd that both units have seemingly packed up.
Have the drivers been connected directly to an amp to test them yet, ignoring crossovers?
No I have only re-installed them in their cabs and tested with my meter and there is absolutely nothing https://uploads.tapatalk-cdn.com/20180607/c5dba100c76a694611b4d0a53fdb9e42.heic
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Are they open circuit. If not are they connected correctly. If that's ok the are the voice coils free
I think somehow the voice coils have taken damage though lord only knows how
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There is no rubbing sound and they move up and down freely
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walpurgis
07-06-2018, 17:59
I think somehow the voice coils have taken damage
I doubt it, unless you were rather brutal with the cones. Try remaking the soldered connections at the terminals where the lead out wires attach if you can reach them.
I doubt it, unless you were rather brutal with the cones. Try remaking the soldered connections at the terminals where the lead out wires attach if you can reach them.
Do you mean here ?https://uploads.tapatalk-cdn.com/20180607/85602434174b48194123144f4f501e2d.heic
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Nop sweet fa
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walpurgis
07-06-2018, 18:07
Do you mean here ?
Yeah. Although that looks perfectly OK. If all the soldering at the terminals looks like that leave them alone.
Good here too ....https://uploads.tapatalk-cdn.com/20180607/907fc17605fc6ab69e71c64bc96f0214.heic
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Well it looks like they’re knackered ( somehow) and that makes refurbishment of the JBL Aquarius uneconomical, I am truly gutted [emoji30]
One consolation is that the radfords only need a tweeter .
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I just tried the other one and I placed the meter probes directly on the wires from the terminals and wiggled them and THEY WORKED....for a few seconds
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walpurgis
07-06-2018, 18:20
Hmm. In that case, do remake the soldered joints. Just get them hot enough to melt the solder, don't pull the wires out. Then test them again.
Must have been the meter probes as I can’t replicate it now
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Nowt !! [emoji22][emoji22]
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Last resort ?
Dust cap off ?
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walpurgis
07-06-2018, 18:31
Last resort ?
Dust cap off ?
No. Nothing you can repair under that.
Gently scrape the paint off the two 'pips' on the cone front to expose the metal that should be there and put a meter across. You can always put a dab of black paint on them later if need be.
Here goes ...https://uploads.tapatalk-cdn.com/20180607/a13132ed4e3e12470040d45b7b6e42c6.heic
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Nothing
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Well I guess the tweeters will be worth a few quid
Someone online ( another forum said that the crossover is to die for [emoji23]
Well I certainly don’t agree
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walpurgis
07-06-2018, 18:42
Coils must be buggered then. Very strange.
A sad day , especially as I had to pay customs & excise to release the bloody surrounds [emoji35]
Oh well tomorrow’s another day
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walpurgis
07-06-2018, 18:45
Well I guess the tweeters will be worth a few quid
Yeah, a pair of LE20's should fetch around £100 I reckon.
Somebody may well want the 8" drivers even if not working, they are sought after. There may even be recone kits available in the states.
The crossovers have some value too.
Have you seen the crossover Geoff https://uploads.tapatalk-cdn.com/20180607/88956e203fb8d2a6a11c8585255d0772.heic
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walpurgis
07-06-2018, 18:48
Somebody will want those, They're JBL! :)
Just bloody loud ?
I may as well try and flog the cabinets too
Thanks for your help Geoff
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walpurgis
07-06-2018, 18:56
Looks like I was right.
https://reconingspeakers.com/product/jbl-le8-8-aftermarket-recone-kit/
Might be a really stoopid suggestion, but have you tested your meter on a different pair of speakers (or even just a resistor)
I've done some daft things myself where I was convinced something was knackered but it was actually the battery in the meter going dead.
Might be a really stoopid suggestion, but have you tested your meter on a different pair of speakers (or even just a resistor)
I've done some daft things myself where I was convinced something was knackered but it was actually the battery in the meter going dead.
Yes done that mate [emoji30]
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Looks like I was right.
https://reconingspeakers.com/product/jbl-le8-8-aftermarket-recone-kit/
Yes mate you were but with delivery and vat at this end that’s another £100
The surrounds were £24 the vat here was £12 !! [emoji35]
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Yes mate you were but with delivery and vat at this end that’s another £100
The surrounds were £24 the vat here was £12 !! [emoji35]
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And now the 2nd crossover is glued and pinned from inside ...I’ve had it with these bloody things
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walpurgis
07-06-2018, 19:06
Yes mate you were but with delivery and vat at this end that’s another £100
Yeah. There'd be duty too.
vinylspinner
07-06-2018, 19:18
Why not try DC Boultons, maybe they could repair them,
hifi@audioloudspeakers.co.uk. tel:07860 20274995
Nigel
Hi Nigel , appreciate your input mate but I’ve really had with them and besides they’re going to want at least £100 to do it and that’s if they can . Sometimes you just gotta walk away [emoji1303]
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Yeah. There'd be duty too.
The crossovers https://uploads.tapatalk-cdn.com/20180607/6d3e7cbe18982615c4a1d05417d11fa0.heic
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Thats bad news. can only think the wires in the speakers were very thin and broke when work was done on them.
If you can get the cones out cleanly, I have fixed voice coils before by winding the wire off on to a spool till the break, soldering the break, dab of french polish, wind back on, one or two coats of french polish. Re-assemble.
Steady hands needed, but if they're scrap as is, what have you got to lose?
'After market' cone kit means it isn't genuine. Try them with a 1.5v battery-i wonder if its your meter....
Not to worry as I have a use for them ....https://uploads.tapatalk-cdn.com/20180608/d37190a78819dbe0a64d2504987a5077.heic
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Lawrence001
08-06-2018, 18:52
Have the voice coils jammed in the gap, it's happened to me before. Place them facing up and carefully, with 4 fingers evenly spaced around the middle, push gently up and down, are the cones moving freely?
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Have the voice coils jammed in the gap, it's happened to me before. Place them facing up and carefully, with 4 fingers evenly spaced around the middle, push gently up and down, are the cones moving freely?
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Hi Lawrence, I’ve tried that too [emoji30]
They move perfectly free too with no rub what so ever . Gutted really
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Lawrence001
08-06-2018, 21:29
Ah just realised the first photo showing 6ohms was before the recone, they are open circuit now? Unlikely to be caused by the recone, what happened when you plugged them back in? Any pops?
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Here goes ...https://uploads.tapatalk-cdn.com/20180607/a13132ed4e3e12470040d45b7b6e42c6.heic
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Andy, how did you meter test this step? Across the two pips to measure resistance or each pip back to its corresponding terminal on the back for continuity?
If continuity is fine from each pip to its corresponding rear terminal then try continuity between each pip to where the corresponding lug is on the voice coil. (you may have to remove the dustcap, but I think I read elsewhere in this thread that you did remove the dustcap anyway). With a bit of luck it is only a continuity issue requiring a rebraid or renewal of the thin wire.
Andy, how did you meter test this step? Across the two pips to measure resistance or each pip back to its corresponding terminal on the back for continuity?
If continuity is fine from each pip to its corresponding rear terminal then try continuity between each pip to where the corresponding lug is on the voice coil. (you may have to remove the dustcap, but I think I read elsewhere in this thread that you did remove the dustcap anyway). With a bit of luck it is only a continuity issue requiring a rebraid or renewal of the thin wire.
Hi Edward, I haven’t removed the dust cap yet , that was to be the last resort , I’ve kind of given up on them now to be honest
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Hi Edward, I haven’t removed the dust cap yet , that was to be the last resort , I’ve kind of given up on them now to be honest
Sent from my iPhone using TapatalkTry checking continuity between the pips (which you have opened up anyway) and the corresponding rear terminal. It is a one minute job. Hopefully continuity is broken there so no dust so removal will be required.
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Try checking continuity between the pips (which you have opened up anyway) and the corresponding rear terminal. It is a one minute job. Hopefully continuity is broken there so no dust so removal will be required.
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I will do that in the morning mate thanks
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walpurgis
08-06-2018, 23:05
Removing the dustcap wil just give you a nice view of the magnet pole piece, but not anything you can fix.
Replacement lead out wires from the cone to terminals are available, but if you get no reading across the 'pips' the problem likely lies with the coils. Even checking that entails removing the cones. The foam surrounds will need prising off the chassis edge and the rear spider will need the same, if you can even reach it all round to do so.
I will do that in the morning mate thanks
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Good morning Edward, I have just tested for continuity like you said and there is no break in continuity from the cone to the terminals [emoji30]
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Sorry it did not work out Andrew.
But still I imagine that the issue is something simple. From what I understand both drivers tested just fine and then when you did the cone surrounds both drivers now no longer read. Given that the continuity between the tinsel wire check out ok my suspicion is that the connecting voicecoil wires have been disturbed. Personally I would, given there is now nothing to lose, remove the dustcap and see if I can lay new wires parallel as far as I could from where the voicecoil wire meets the tinsel 'pip' to the voicecoil itself.
Obviously a new voicecoil and rewire will sort it but that would involve a full recone which probably makes your project uneconomic.
Glad to see your Radfords are now sorted. How do they sound?
Hi Edward, I’ve given up on the Jbl’s now mate and they’re now on devilbay.
The radfords sound surprisingly nice though my ocd means I’ll never be happy until they have their original tweeters.
I now have a pair of huge Radford Auditorium speakers and they sound absolutely incredible.https://uploads.tapatalk-cdn.com/20180612/781655d4c8a66dc2f535d3518fd60b8f.heic
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