Variac
Radian seems to have rationalised their product line. Though I have some of their pro-drivers (12"LF, 12"co-ax, 8"co-ax, these co-ax are the ones Radian is currently positioning as premium ceiling speakers), the one's I am currently using are with foam surrounds. These were previously their Studio Series, which they don't seem to be offering nowadays. It would be such a shame if they are dis-continued.
Radian seems to have rationalised their product line. Though I have some of their pro-drivers (12"LF, 12"co-ax, 8"co-ax, these co-ax are the ones Radian is currently positioning as premium ceiling speakers), the one's I am currently using are with foam surrounds. These were previously their Studio Series, which they don't seem to be offering nowadays. It would be such a shame if they are dis-continued.
I can get some of these Woofers:
JBL 15" marked: ME150H
Anyone know about them?
I'll bet Roddyama wins this one!
JBL 15" marked: ME150H
Anyone know about them?
I'll bet Roddyama wins this one!
Sorry Mark,
I'm not familiar with that one. I do have a listing for a JBL M151-8ohm that with the right crossover equilization will get you 100db-W-m in a 200l box with an f3 of ~37Hz.
I'm not familiar with that one. I do have a listing for a JBL M151-8ohm that with the right crossover equilization will get you 100db-W-m in a 200l box with an f3 of ~37Hz.
Well, I ordered the woofers, and should get them about monday.
I hope they are similar to what Rodd spec'ed. That's just what I need I think, but we shall see. Spec's could be completely different. They are new old stock I believe, and I'm a little worried about what appears to be a foam surround. Anyone know how much an official JBL surround replacement costs? Do JBL foam surrounds degenerate?.
I'm crossing my fingers that they will sound GREAT!
Mark
I hope they are similar to what Rodd spec'ed. That's just what I need I think, but we shall see. Spec's could be completely different. They are new old stock I believe, and I'm a little worried about what appears to be a foam surround. Anyone know how much an official JBL surround replacement costs? Do JBL foam surrounds degenerate?.
I'm crossing my fingers that they will sound GREAT!
Mark
Foam surrounds rot eventually. For JBL 4341 and Control5, approx 3 yrs here. May be better under controlled conditions, like a fully air-conditioned recording studio. Funny thing is, I think it last longer if a speaker is often used.
One of the biggest enemies of foam rubber are certain solvents and their fumes, like acetone (fingernail polish remover) or keytone. Also some glues like model airplane glue and the fumes it gives off while curing.
The silent surround killer is ultraviolet light. Ultraviolet will polymerize (harden) the foam until it eventually crumbles to dust (did you ever see an old rubber tire with dry-rot). That's why I always keep the (black) grills on. Hopefully, that will help to slow the process.
The silent surround killer is ultraviolet light. Ultraviolet will polymerize (harden) the foam until it eventually crumbles to dust (did you ever see an old rubber tire with dry-rot). That's why I always keep the (black) grills on. Hopefully, that will help to slow the process.
there is also a water based tile grout sealant i have used with good sucess to increase the longevity of foam surrounds... i'll have to dig out a bottle to get the brand.
dave
I heard that latex caulk diluted with water helps too.
I suspect ozone is also a culprit-that's one of the things that rots tires. Haven't they developed factory applied coatings now that protect the foam?
I suspect ozone is also a culprit-that's one of the things that rots tires. Haven't they developed factory applied coatings now that protect the foam?
If I'm not mistaken, Eminence builds the JBL drivers. So, if you poke around in their generic product line, you should be able to find something with a pretty similar sound.
Eminence does build a lot of drivers for a lot of companies, but I don't think for JBL. They are part of the Harmon Group which does make drivers. The metal baskets look completely different as do other things, so I don't think we can match it even if it was made by Eminence
As you know I certainly believe that Eminence could (and might right now) make a driver equal in performance to JBL stuff, but I just don't know.
As you know I certainly believe that Eminence could (and might right now) make a driver equal in performance to JBL stuff, but I just don't know.
Variac said:
JBL does get some drivers made out of house... it all comes down to what is most cost effective.
For 15" drivers they are likely built in-house thou.
dave
I wouldn't be suprised if some or all of the JBL GT/auto sound drivers were made by a third party vendor.
I got my 15" JBL's today. Here are some pics.
The carton they are in is addressed to the JBL consumer division which would jibe with the little info I have that they were for a $2500 home speaker (each or a pair? 😕 )
They are certainly built to pro PA standards!
Anyway they are new and are 8 ohm and the surround is a type of foam but I pressed on it and no cracks and it sprung back fine. The cone is coated with something (aquaplas?) but feels light. The frame is massive and has black crinkle paint. The magnet is massive and the whole thing weighs over 25 lbs.
I may be able to get more . The price would be around $125 each I think in quantity, plus shipping which is about $25 each I'll bet. If I decide to do this I'll post in the Trading post. E-mail if you would be interested.
The carton they are in is addressed to the JBL consumer division which would jibe with the little info I have that they were for a $2500 home speaker (each or a pair? 😕 )
They are certainly built to pro PA standards!
Anyway they are new and are 8 ohm and the surround is a type of foam but I pressed on it and no cracks and it sprung back fine. The cone is coated with something (aquaplas?) but feels light. The frame is massive and has black crinkle paint. The magnet is massive and the whole thing weighs over 25 lbs.
I may be able to get more . The price would be around $125 each I think in quantity, plus shipping which is about $25 each I'll bet. If I decide to do this I'll post in the Trading post. E-mail if you would be interested.
Attachments
Hi Mark,
You may want to pose your question here at the Lansing Heritage forum.
http://www.audioheritage.org/vbulletin/forumdisplay.php?forumid=2
You may want to pose your question here at the Lansing Heritage forum.
http://www.audioheritage.org/vbulletin/forumdisplay.php?forumid=2
Thanks, not a bad idea.
I got 2 of 'em but the rest are now gone. I was pretty tempted by 4 per channel on an open baffle. The price would have been less each. Then I would have had enough total excursion for some shaping down to serious bass, and 8 ohms to boot. Also 4 15" per side have a certain charm.. No room for that really so I hesitated. Probably for the best!
I got 2 of 'em but the rest are now gone. I was pretty tempted by 4 per channel on an open baffle. The price would have been less each. Then I would have had enough total excursion for some shaping down to serious bass, and 8 ohms to boot. Also 4 15" per side have a certain charm.. No room for that really so I hesitated. Probably for the best!
Variac said:
Oh Variac,
Why didn't you !?!?
Yes it would probably have been to big ,
but what great potential for great sound and beautiful music 😉
cheers
Hey! No tormenting or torturing fellow forum members!!
It's the law!!!
Yes , I'm kinda sad I didn't go for it. I had a plan: 2 PHL 16 ohm mids and a Stage Accompany tweeter. I spend too much time dreaming about DIY Audio and not enough working!, so I really would have had a hard time paying for even the 8 woofers (total cost: less than $800
Not to mention: like all of us, I do my best work (and make my "best" decisions) when my wife is out of town. She is very close by at the moment which is a very good thing, but that inhibits my most "creative" projects
It's the law!!!
Yes , I'm kinda sad I didn't go for it. I had a plan: 2 PHL 16 ohm mids and a Stage Accompany tweeter. I spend too much time dreaming about DIY Audio and not enough working!, so I really would have had a hard time paying for even the 8 woofers (total cost: less than $800
Not to mention: like all of us, I do my best work (and make my "best" decisions) when my wife is out of town. She is very close by at the moment which is a very good thing, but that inhibits my most "creative" projects- Status
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