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Fun with JBL S99s

pmsummer

simul justus et peccator
I picked up a sad pair of JBL Lancer S99s last week that were in pretty rough shape. Paid too much ($100), but it's a long story, and honor was involved.

One grill was missing, and 4 of 16 corners were mushed a little, but the drivers were good. The biggest problem was a roughly one square foot of ruined veneer on one of them. It looks like it sat on a wet towel for a few years. Color bleached out. Veneer blistered away and splintered. But I really bought 'em for the drivers, so what the heck, I thought I'd experiment with veneer refinishing...

Before:
419462143_d32c6c2b19.jpg

What you see here is after the SECOND step (I forgot to document the original condition). The light area is the discolored veneer, and is just how they looked when I got them. This shot is after I put a diluted Elmer's solution under and around the lifted/splintered veneer. The dark area is where the glue seeped out next to a layer of wax paper I put on top of the damaged area before I put the 50 lbs of smooth granite slab (and the other speaker) on top of the spot. The blistering, peeling veneer was about 1/3 of the bleached area.

I began by applying wood filler into the cracks and small missing areas. After it dried, I then sanded the entire area (using elbow grease AND a small orbital sander) to get the wrinkled veneer as smooth as possible.

Next, I applied some Howard's Restor-A-Finish, followed by more sanding, and some more Howard's.

Mid step:
419480147_7388324c17.jpg


I next added color to the larger wood-filler areas, and then two coats of tung oil with a 0000 steel wool rub.

The results aren't perfect, but these are going to replace my KLH 23s on top of a bookshelf in my office (after I re-cap them). They'll be grill-less, but out of harm's way.

After:
419462145_74bbb9e3e3.jpg


I didn't try very hard to get the dark bands out, but they do look better now.

Also (don't shoot, you JBL purists), but because the surrounds had ossified, I treated them with Castrol DOT4/5 brake fluid to soften the Lans-alloy surrounds. A teeny little bit got on the cones around the edge, but now I can play them and hear something approaching what thwy were supposed to sound like.

Anyone got a single Lancer 99 grill out there? :)

So, I've got me some JBLs, and some fun. I'm eager to get new caps into them, but that's probably an April project.
 
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I do appreciate the thread on these I have some that I am very pleased with. I re-foamed 1 pair and with a little motorola tube amp I was very pleased with the results, the le14 is a pretty good speaker. I too plan on refresing the cabs and doing a recap but I am needing some more room and time to take care of them. At this time I have 5 of them so perhaps later in the future when I get the 4 keepers sorted out I could have a grill, although it probably wont be the pick of the litter. I hope you enjoy them.
 
Zilch said:
With new surrounds, the LE14As will come to life.

The brake fluid will last about 6 mo.

You missed a single L99 grille on eBay last week, alas:

http://cgi.ebay.com/ws/eBayISAPI.dl...MEWA:IT&viewitem=&item=260092000955&rd=1&rd=1

There'll be more. S99s are a common part-out.

Set up in your "Favorite Searches," maybe.... :thmbsp:

Yeah, I saw that grill, and watched it float away. I'll keep watching.

The surrounds are very pliant now. Do you think that replaced surrounds will IMPROVE current performance, or just as a long-term cure? I've replaced many a surround on EPI and Boston Acoustic speakers, which both have large clearances around the voice coil (so centering was not a problem). I suspect the JBLs have closer tolerances, so that might be a job I farm out to my local JBL repair specialist.

Again, the cabs are pretty beat on these, so a full restoration seems unwarranted. This seemed like a fun way to get to know something about JBL speakers (having spent most of my audio life over the last 30 years in the "New England/England" speaker orbit). Not sure what to expect sonically from these.
 
brainsmasher said:
I hope you enjoy them.

Brainsmasher,

Yes, do keep me in mind for that grill. The one I've got is broken, but repairable. Like I said, these are being prepared to listen to, not to look at too closely.

I'm not sure what to make of the sound yet. Seems a little confused, so it may be a cap issue, or the LE14s not running up to speed.

But they're my first journey to the "West Coast".
 
pmsummer said:
Zilch,

What horn and driver is crammed into that S99 box you showed?
S99 is one of the JBL products that gave LE14A an unwarranted bad name. It is actually revered as perhaps JBL's most musical and versatile woofer, and a variant of it, LE14H-3, is presently used in some of JBL's TOTL offerings, inculding kick-ass subwoofers.

The reason is that S99, a two-way, crossed the (now, mediocre) LE20 tweeter with it at 2 kHz.

http://manuals.harman.com/JBL/HOM/Technical Sheet/S99 ATHENA ts.pdf

LE14A doesn't play that high very well, and was thus shackled with a rep for "muddy midrange." Well, I get a clue: LE14A is a WOOFER, not a midrange. Mate it with a horn/driver combination that plays down to LE14A's "sweet" range (800 - 1200 Hz,) and the combination is killer.

The horn in the pic is JBL's progressive transition waveguide, PT-H1010HF, which has a 100° x 100° dispersion pattern. The driver is the neodymium-magnet, 3" diaphragm, 1.5" exit 2431H. The boxes are retuned (ports in rear) and the drivers are biamped. Think intermediate between the JBL 4425 and 4430 biradial monitors.

There's a less expensive way to go using 1" compression drivers and JBL's $10 version of that horn with a 90° x 50° dispersion pattern. Here's the thread:

http://audioheritage.org/vbulletin/showthread.php?t=7671
 
pmsummer said:
Thanks! Looks like I could have some fun with these! :yes:
Well, put getting your beautiful LE14As professionally refoamed by a JBL authorized service center high on the list. Should be about $50 apiece to have that done.

If you've done others, you might try DIY first. Remove that black vinyl gasket on the front carefully. You'll have to reuse it....
 
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