Questions on repairing, restoring or upgrading factory systems and components from JBL, Altec or LMCo
This quoted post gave me the idea for this thread... Most Pro tech sheets can be found direct also, on the JBL Pro website: There use Links: - "Technical Library" for all manner of white papers and other. - "Product Guide", then "Vintage Products" - page down for your cabinet Also:
This thread is an index to various other threads and references on the early JBL 4-way monitors. From the L250 profile on this site: The four-way concept allows for very wide dynamic range since the individual drivers are called on to reproduce a relatively narrow range of frequencies and...
This thread is for the collection of stock Altec/JBL physical enclosure information. Any information is desired and will be archived. Here is an example of some information that might be of interest: JBL Model 120Ti Gross External Dimensions: 24-1/2 x 14-1/4 x 11 (back panel recessed 1/8)...
The intent of this forum is to develop a community of people that share a common interest in the products and legacy associated with James B. Lansing. To that end, it is my intent to foster as wide ranging discussion as possible. There is even a place for non Lansing related discussion - the...
I took these pictures from a I guess a Heathkit Altec Valencia clone. I just bought 2 pairs of these, one pair being real Altecs, and the other were the clones. I read somewhere on here that the xover was different, and it is. These have what should be the caps encased in like a black plastic, and...
Googled for new dias for my 808´s. Noticed the same replacements where sold for Altec and for example LE175 and 2425. As I have never heard of this before I doubt it will work. Or will it? If so it would be interesting to try some of the later JBL in the Altec.
Hi, I'm yet another new guy with a bunch of questions :eek: I bought a pair of L88s, would like to restore them, and need some advise. 1) Both 123A-1s are fine but the tweeters have been replaced by some rat shack 10W jobs and they are both open circuit. Have you any suggestions as to what I...
I the opportunity of getting hold of some mint 4355s but found them a little harsh over extended listening times. What’s the general opinion of these speakers? I understand were constructed regardless of cost to the highest standards possible at the time. My guess is they require setting up...
Some time ago, I purchased a pair of L100 foam grill inserts from forum member "sonofagun", which I love. Recently, I have noticed two other sellers of new L100 foam grill reproductions on that big auction site - "Foam trends" and "sculpted-foam-inovations". Does anyone know if these are two new...
Hello everybody, Few months ago I bought a pair of 4333A in pretty bad shape. The good thing is I paid 130 bucs for them. The cabinets have water damage and the woofers membrane are not looking good either. I will try to find a good looking pair of PR15 passive woofers and try to replace the...
Hi, As a newbie, let me first say thank you for the information, time and dedication this site represents. What a wonderful resource! Had I found it sooner I might not be asking these questions. That said, I've had the pleasure of owning a pair of 4315A's for the last 30 years. So, when they...
they work.. my bad.
I have a pair of 2445 driver with 2446 ribbed membrane. measuring freq.response i have realized that both have deep notch "hole" about 3kHz ( about 15dB deep and say width about 1kHz/-15dB ). The picture is the same with an other driver too. Is there any explanation or experience about such bad...
I couldn't find a schematic for this or any other info.What drivers were used with this crossover ?
So I pulled my 2122H pair because the surrounds were old. One had just developed a little hole and the other was just as brittle... the surrounds on both looked identical and of identical age. I started the re-surround and I noticed that one of the cones seemed ever-so-slightly different from...
Is the gasket still usable after a woofer has been detached from cabinet?
First, my apologies for lighting this forum a fire this afternoon with all this very specific tweeter talk. As the subject line suggests, I'm curious if the JBL 053TI and 053TIS are interchangeable from the perspective of installing them into a JBL LSR28P. Does anyone know? Has anyone tried...
I did a search and was not able to find the info, so please excuse me if this is re-hashing old stuff. I picked up a single Altec A7-500 cabinet. The woofer is a 416-8B (it may have been re-coned at some point) and the top section is a 511 horn with a 802-8T driver. The network is a N501-8A and...
Hello forum members Does anybody know the difference between these two drivers - both should be 2445J's but as you can see one has a conical shape at the throat end and the other is the "normal" shape that I have seen on any pictures on this site. The "normal 46187 "Conical" both pionting...
I picked up a set of beat up L45 Flairs, I have enough projects already and wasn't looking for another. They only wanted $10 for the pair and the cabinets were bad enough I was pretty sure I wasn't going to be temped to restore them. Just save them from the trash bin. They have the standard...
Hello everybody, i'm new at this forum so if i posted this topic in the wrong thread, correct me plz :) now my problem. i bought a few months ago a new speakerset, the JBL Creature II. The sound is great! this week my nutrition exploded :o so i had to buy a new one, my computer works...
Hello everyone, I'm new to the forum, and I introduced myself to yours. Am french (nobody is perfect!) And I live in Normandy, I am passionate about food and listen to the JBL 43xx series, I have a pair of 4333A, 4315A, L300, L65 Jubal, and I make copy of a pair of 4345 with plans found on...
Hello I am brand new JBL owner! I just snagged a pair of L-100's in relatively good condition for ~$150 and so far I love the speakers. They have excellent bass and I love their forward sound. Anyways I am wondering if I need to do any maintenance on these such as replacing the caps or other...
Just removed the crossovers to have them upgraded with new capacitors and better wiring but I find on the two rear units with the coils on that there are 2 different coil sizes though capacitor wise they look the same. Any idea what’s going on I Presume one is from another model ? I will try and...
Hi: I found a pair of 2121 mids for a 4343 project I am starting, but contrary to the sellers claims, the cones look to be aftermarket. Can someone tell me if the original cones had any identifying marks on them, something similar to the '50320' marks on my 2231As? Any help would be greatly...
I bought these on craigslist for $40 a few years ago, but the original owner had replaced the woofers with car subs so I just kept them in storage until I could find replacement woofers. I finally found a pair of 125a drivers at a reasonable price, and bought a refoam kit also. I've refoamed...
Anyone have a diagram with a cross sectional (or anything that gives some information) of the phase plug assembly used in JBL compression drivers (2425 2426, others). They describe it as concentric exponential horns in the lit, but I've not been able to find a good diagram. Thanks.
Good summer to everyone! I was listening to Vijay Iyer's excellent CD "Historicity" and observed that piano was sounding somewhat "hard" and straining to the ear. First I though it was because of the room, but later decided to play some sinetones and instantly noticed something's wrong. The...
i have 3 or 4 of them now, as i've blown them in the past. Is there no way to recone these via a new diaphragm? It seems awfully silly to be purchasing new tweeter units if you didn't have to. Lucky JBL doesn't make cars, I'd hate to have to buy brand new engine everytime the alternator dies. ...
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