View Full Version : jbl l-65


ojom
11-10-2010, 03:40 PM
Anyone know what is being asked of the woofer in the L65's as far as frequency range? Also, what the power handling specs are for the LE-5-5, furthermore, the max power handling for the crossover? I know the specs for the speaker are 200 watts max, but is that peak?

dumptruck
11-10-2010, 03:58 PM
As in Jubal? http://www.lansingheritage.org/images/jbl/specs/home-speakers/1975-l65/page8.jpg
Doesn't answer your questions exactly, but you can get a pretty good idea. Why do you ask?

SPAM
11-10-2010, 05:45 PM
JBL Consumer Tech Sheet Links (http://www.audioheritage.org/vbulletin/showthread.php?10661-JBL-Consumer-Tech-Sheet-Links)

There's three variations of L65. Each used a different woofer, so if you know which woofer you've got you can deduce which L65 variant.
The foil decal would probably say "Model: L65" on all three flavors. The "A" or "B" designator typically appears after the serial number.

bhunter
11-10-2010, 11:22 PM
The best thing you can do for them is get them off the ground. I have mine raised about 18 inches off the floor and they sound and image much better. The xover is 1000Hz and 6500Hz. I like mine a lot, but it took me a while to get them to sound right in my room. They get quite loud even with modest amps. I've driven them with everything from an HK PM645 45wpc integrated to a Pioneer Elite C91/M91 at 200wpc. Currently, they are on an Onkyo 5.1 receiver doing HT duty.

People seem to dislike the L65, but I find it to be much, much more refined than the L100. Its odd size seems to garner most of the complaints together with its somewhat inflated price on that site.

Isotonic
11-11-2010, 02:22 AM
I love mine. The midrange can be a bit intense on these. I found that adjusting the attenuator resulted in information lost. My solution was to recap with vintage PIO caps. That smoothed out the mids nicely. They are now amongst my favorites, and the tweeter is very special, very creamy.

I have mine about 12 inches off the ground. I made a pair of stands out a a discarded pair of speaker boxes. I sealed them, filled with sand, spiked, and slapped a slab of granite on them.

ojom
11-11-2010, 08:02 PM
I am asking because I have a pair of l-65 cabinets..in fairly rough shape. Woofers and tweeters gone. Empty cabinets except for the midrange drivers and crossovers. I thought rather than parting them out, and chucking the boxes, I would install prosound woofers and knockoff bullets and use them for DJ monitors. I know some would scream..but I think it would be a good second life for these old girls.

I was asking about the woofers because I know in the L-100's the woofer ran fullrange. I also think that the crossover could be a touch delicate for this job.

BTW When I say the woofers and tweeters are gone I mean GONE as in not here.

dumptruck
11-11-2010, 08:13 PM
Oh I see. I think you'll have a tough time using other drivers without changing the crossover. 3-ways are tricky in general. Maybe parting out and converting the baffle for a good 2-way speaker for DJ use would be best for a second-life option, ala econowave.

4343
11-11-2010, 08:43 PM
Oh I see. I think you'll have a tough time using other drivers without changing the crossover. 3-ways are tricky in general. Maybe parting out and converting the baffle for a good 2-way speaker for DJ use would be best for a second-life option, ala econowave.

+1 on the Ewave. Save your money on the aftermarket bullets, you won't need them with the D220Ti or the D2500Ti driver. The Ewave crossover can be beefed up just by putting higher wattage resistors in it, several I've built have 25 Watt vs. 10 Watt and handle any amount of power, up to the limit of the woofer at least.

I like the 077/2405 slot a lot more than even real bullets (075/2402), they match the dispersion pattern of the Ewave top, but I've never felt a need to add them. I do use them with my 2" drivers (2445 or 3446), and they will take all you can give them, night after night:music:.

ojom
11-13-2010, 09:37 AM
+1 on the Ewave. Save your money on the aftermarket bullets, you won't need them with the D220Ti or the D2500Ti driver. The Ewave crossover can be beefed up just by putting higher wattage resistors in it, several I've built have 25 Watt vs. 10 Watt and handle any amount of power, up to the limit of the woofer at least.

I like the 077/2405 slot a lot more than even real bullets (075/2402), they match the dispersion pattern of the Ewave top, but I've never felt a need to add them. I do use them with my 2" drivers (2445 or 3446), and they will take all you can give them, night after night:music:.

Thanks for all the new info. When you say you do use the slots with your 2" drivers-can you expand on this? What cabinets what config. etc..

dnewma04
11-13-2010, 09:48 AM
He is referring to the JBL 2445 and 2446 compression drivers. They have a 2" throat and they will only get to about 10khz.

ojom
11-13-2010, 10:51 AM
Oh ok in a three-way I suppose. Whats the low cross for that horn, more or less (I know it's somewhat woofer dependant)?

dnewma04
11-13-2010, 01:04 PM
Its a compression driver, the horn will probably limit low freq extension as much as the driver. I've seen them crossed as low as 300hz in a home environment.

ojom
11-14-2010, 11:09 AM
Ok so I have installed an Eminence Kappa Pro 12" into my L-65 cabinets, I have also wired the knockoff bullets(Heavy Duty Titanium Super Tweeter TW47 ) all from P.E.. I am using the stock Le5-5 mid.

The sound...certainly there is more bass than the Pioneers I was listening to, certainly not as much bass as my AR3's though. The tweeter is very nice creamy is a good description....simply clear, icy. All the drivers seem to be playing nice with the crossover as is. Overall I love the sound, balanced enough, no standout efficiency problems, this woofer sounds very smooth and seems to be a good choice so far.

The speaker sounds constrained with the stock L-65 port. When I removed the le25 tweeter I had plugged in there, and pulled out my wires and test ran the bullet, the bass improved very much, the woofer wants to breathe. So Iwould like to re-port this box. Breathing through the tweeters hole may be scintillating for the woofer, but hey she didn't ask him for that kind of attention.

So I was thinking two ports, a mirrored pair using the stock port location, and a twin on the other side. How do I figure this all out port length..woofer resonance...tuning frequency?

Cosmos
11-14-2010, 11:55 AM
Ok so I have installed an Eminence Kappa Pro 12" into my L-65 cabinets,

WinISD does not have Eminence Kappa Pro 12" data in it. However, it has a Kappa 12". As I recall, a L65 cabinet was around 4 Cu Ft. If so, a Kappa 12" isn't a great choice for a woofer, but have no info on a "Kappa Pro 12".

I would guess, based on the Kappa 12, that the cabinet is actually tuned too low.. Which means your assessment is on the right track. However, this woofer does not appear capable of much, if anything below 50 Hz in any box..

ojom
11-14-2010, 12:31 PM
Well I downloaded WinISD and I think it is very unuser-friendly. I could not get here nor there with it. I input all parameters...twice converting mm to m and so on and both times lost it all. Where is the 'heres how long to make your 3" port screen'? I made a test tone!

GordonW
11-15-2010, 08:52 AM
Enminence Kappa Pro 12A datasheet:

http://eminence.com/pdf/kappapro-12a.pdf

Concur with Cosmos- this woofer is pretty much out of there below 50 Hz. In a 2 cubic foot enclosure (about what the L65 is), you want about a 1.5" length single 3" port, to tune it to 50 Hz. For dual 3" ports, they need to be 5.25" long. WinISD definitely does recommend dual ports... to keep the port from making noise.

Though this is akin to closing the barn door after the horse has escaped... I'd have been inclined to use the Eminence Deltalite-II 2512, instead of the Kappa Pro 12. The guys in the Econowave thread have been using that woofer extensively. Seems to work well in about 2 cubic feet, tuned to 36Hz. Two 3" vents about 7.5" long per cabinet...

Regards,
Gordon.

Cosmos
11-15-2010, 09:16 AM
Gordon said it much clearer than I did. It just isn't a good choice for a woofer. Do you have anything else?

ojom
11-21-2010, 03:20 PM
I bought the Kappas really to use in a prosound application, I was going to build a pair of DJ monitors. I thought I would use the l65 boxes rather than just starting out from scratch. How about JBL 2214h's?

tarior
11-22-2010, 01:32 AM
It's rare to hear me say this, but I'd E'wave 'em. Use the woofer that Gordon recommended along with the Selenium D220ti driver and JBL PT waveguide. You'll end up with some pretty decent monitors I suspect.

ojom
12-04-2010, 06:32 PM
I should be getting the new woofers soon.

ojom
12-05-2010, 10:04 AM
Need some help. I have tried to figure it out myself but I am not so proficient with Winisd, so.. can anyone tell me what vent sizes I would need to use the 2214h in my stock L-65 enclosures....I have read that I should tune this woofer to 38hz? Is that correct? Thanks in advance guys.

dumptruck
12-06-2010, 11:23 AM
Designing ported speakers isn't all that easy, since you have to consider port velocity and resonance in addition to the overall response. You should be able to get winisd working without too much trouble, though. Read the help files. I think any tuning in the mid 30's should work okay. Here is my winisd file for that woofer, which I think is correct but I make no promises. Remove the .txt extension.

ojom
12-06-2010, 08:36 PM
Your right, i was trying to use the pro version the regular winisd
was much easier. I got the internal dimension of the L65 at around
4400 cubic inches. Does anyone know for sure?

Cosmos
12-06-2010, 09:33 PM
2.5 cu ft (4400 cu in) sounds small for L65 cabinets... but, in fact I think. it's actually closer to 2 Cu Ft..

WinISD likes tuning at 39 Hz with one 4" diameter port tube 8" long. Personally, I'd start with a little longer tube though.. maybe 10" and play with the length by trimming if you can do so..

Anything close will likely be close enough.

ojom
12-07-2010, 09:22 PM
Well my 2214h woofs arrived. One refoamed with a comparatively compliant surround, one with a harder, seemingly smaller(?) surround. Sucks. However, I did get the speaker up and running. I installed the 39 dollar pyramid bullet from PE, installed the woof with the softer surround, hacked off the port tube at the elbow per WINisd advice for a single 3" port (tuned to 39hz 3" tube@ 4" long). Sounds really good, I like em better than my AR3's better than any speaker I have heard yet. You can't say, "Hey if you've got any Jubals laying around" that's just silly nobody here has an old pair of Jubals in the garage but, if you did I swear the 2214h's sound great in that box. Oh yeah, they also ROCK OUT WOO HOOO! I have been playing them LOUD, and the tweeter is sorta beamy, but it is very nice and melts right in with the rest of the mix.

ojom
12-07-2010, 09:24 PM
Thanks for all your help you guys. Speakers are fun.

ojom
12-12-2010, 09:40 PM
I have been listening to these speakers now for several days. If you wanted to replace your L-65 woofers with a woofer that will handle more power I can tell you that the 2214h will do the job very well. My L-65 pound now with very deep and fine bass.

131east23
12-13-2010, 12:58 AM
Those are keepers. I grew up on those and have that pair sitting in the closet that need a refoam. Gosh, I should do that and get them in rotation, but time and money are hard to have at the same moment these days. Any pics?