Suggestions wanted for rebuild of JBL L150's

huskydawg9 · 14th January 2010, 03:07 PM

I have a pair of 25 year old JBL L-150A's that I am looking to rebuild. I haven't kept up on recent speaker technology, and would like some suggestions for a complete rebuild. The cases are in good shape, but the speakers themselves are trashed (subjected to years of drastic temp. changes in storage).

My intent eventually is to use a Foobar database on my computer with my USB DDDAC, A 12BH7a linestage preamp that I just completed, and an amp to be constructed later (not sure yet whether tube or SS).

Thoughts?

huskydawg9 · 19th January 2010, 11:38 PM

Quote:

Originally Posted by huskydawg9

I have a pair of 25 year old JBL L-150A's that I am looking to rebuild. I haven't kept up on recent speaker technology, and would like some suggestions for a complete rebuild. The cases are in good shape, but the speakers themselves are trashed (subjected to years of drastic temp. changes in storage).

My intent eventually is to use a Foobar database on my computer with my USB DDDAC, A 12BH7a linestage preamp that I just completed, and an amp to be constructed later (not sure yet whether tube or SS).

Thoughts?

Judging by the lack of comments can I assume this is a waste of time?

Old'n'Cranky · 20th January 2010, 07:06 AM

everyone has a set of these speakers,
and everyones has such intimate knowledge of them,
thats why theres so many replies.

patience is a virtue..........

huskydawg9 · 22nd January 2010, 11:51 PM

Quote:

Originally Posted by Old'n'Cranky

everyone has a set of these speakers,
and everyones has such intimate knowledge of them,
thats why theres so many replies.

patience is a virtue..........

I did find a little info...so am formulating a game plan. If anyone has a suggestion for a better tweeter...

Brett · 23rd January 2010, 08:39 AM

Quote:

Originally Posted by huskydawg9

I have a pair of 25 year old JBL L-150A's that I am looking to rebuild. I haven't kept up on recent speaker technology, and would like some suggestions for a complete rebuild. The cases are in good shape, but the speakers themselves are trashed (subjected to years of drastic temp. changes in storage).

Are all of the drivers damaged? If so, how?

huskydawg9 · 23rd January 2010, 01:38 PM

Quote:

Originally Posted by Brett

Are all of the drivers damaged? If so, how?

these have been stored for a while...not sure of their status. I suspect the HR are less then stellar due to abuse when younger, but visually both they and the MR look 100%. The LR and the passive need the foam surrounds replaced.

Brett · 23rd January 2010, 07:34 PM

Quote:

Originally Posted by huskydawg9

these have been stored for a while...not sure of their status. I suspect the HR are less then stellar due to abuse when younger, but visually both they and the MR look 100%.

Get them tested before deciding to scrap them. The JBL drivers in this are excellent. Plenty of places to test and/or repair the drivers, eg Orange County Speaker in California; drivers can even be mailed in if you live somewhere remote.

Quote:

Originally Posted by huskydawg9

The LR and the passive need the foam surrounds replaced.

Get them replaced, but use somewhere that uses genuine JBL parts, eg OCS.

DougL · 24th January 2010, 02:27 AM

I saw a JBL L100 rebuild over at Ht Guide.
HTGuide Forum - Mission Possible DIY
HTGuide Forum - The Vintage JBL West Coast Sound becomes the…
Almost wanted to pick up a pair after that.
I wasn't a fan in the day.
It really depends on your goals.

Doug

grayeo · 15th May 2010, 07:32 PM

Quote:

Originally Posted by huskydawg9

I have a pair of 25 year old JBL L-150A's that I am looking to rebuild. I haven't kept up on recent speaker technology, and would like some suggestions for a complete rebuild. The cases are in good shape, but the speakers themselves are trashed (subjected to years of drastic temp. changes in storage).

My intent eventually is to use a Foobar database on my computer with my USB DDDAC, A 12BH7a linestage preamp that I just completed, and an amp to be constructed later (not sure yet whether tube or SS).

Thoughts?

what you got mate is one of the finest set of speakers jbl ever made well worth rebuilding ,i have L110s + L300s and L150s and my personel favs are the L150s which i am driving with beard valve amps. trust me mate the L series was JBLs finest hour. so get rebuilding those babys

14th January 2010, 03:07 PM	#1
huskydawg9 diyAudio Member Join Date: Oct 2009 Location: Michigan	Suggestions wanted for rebuild of JBL L150's I have a pair of 25 year old JBL L-150A's that I am looking to rebuild. I haven't kept up on recent speaker technology, and would like some suggestions for a complete rebuild. The cases are in good shape, but the speakers themselves are trashed (subjected to years of drastic temp. changes in storage). My intent eventually is to use a Foobar database on my computer with my USB DDDAC, A 12BH7a linestage preamp that I just completed, and an amp to be constructed later (not sure yet whether tube or SS). Thoughts?

24th January 2010, 02:27 AM	#8
DougL diyAudio Member Join Date: Feb 2004 Location: Wheaton IL. Blog Entries: 25	I saw a JBL L100 rebuild over at Ht Guide. HTGuide Forum - Mission Possible DIY HTGuide Forum - The Vintage JBL West Coast Sound becomes the… Almost wanted to pick up a pair after that. I wasn't a fan in the day. It really depends on your goals. Doug __________________ Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well) Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus

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20th January 2010, 07:06 AM	#3
Old'n'Cranky diyAudio Member Join Date: Aug 2009	everyone has a set of these speakers, and everyones has such intimate knowledge of them, thats why theres so many replies. patience is a virtue..........

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