So a D130 can be reconed as a K140. Is tbis actuall viable... will the now-K140handle the wattage it should on the old magnet assembly?
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Let's See Your JBL-Loaded Enclosures!
- Thread starter Count Bassie
- Start date
Here's a few. I also have another 2x15 awaiting restoration with two K-140s ready to go in and two 1x15s each with an E-140 loaded in it.
The d and k series had almost identical magnet and other physical structure. The K could handle more power. JBL no longer makes re-cone kits. What is available from third parties is a cone for the E series which has the same physical structure except it has a ceramic magnet. These cones will have the higher power capacity that comes with modern high temperature adhesives. (What I just said applies to the K130 which I recently reconed--I presume the 140 series has the same situation). The older ones are better in my mind because the alnico magnet weighs a lot less than the E series. Folks just ran out of alnico and so the ceramic magnet is cheaper.
PS. I had a sunn coliseum in the late 70s. 4 kt88 if I recall. I didn't realize how cool it was and had to get a marshall (I was a guitarist back then)--wish I still had it.
I jist picked up an old Trace Elliot 1518. Gonna load an E140 into it, see what I get. (The cab has some strange speaker in it).
Should be pretty close if it has the 6" long tubes. Mind the low end demands.
I have a pretty close number of 6.2 cu ft of internal volume. It's an older one with Tolex and the red racing stripe. Big dang box.
The recommended int vol is 4 or so cu ft. Lol.
The specs are pretty disappointing. I'll try extending the ports, throwing some rigid pink insulation in it to lose some volume, see what an E140'll do.
Isn't the extra volume ''free lunch'' when you are messing with the port length anyway?
Your Trace has a good low end cut with the bottom two sliders. Not a HPF but nearly as effective.
Your Trace has a good low end cut with the bottom two sliders. Not a HPF but nearly as effective.
There’s a cast frame JBL in my rehearsal amp. It was in an old Peavey PA wedge I bought at a yard sale for $30. It needed a reconing which was about eighty. That speaker can take anything the Peavey can dish out and keep up with any drummer without even breathing hard.
Here is my K-140 cab that I built in 1977. I originally gigged it with a Fender Brown Face Bassman that had an extra set of output tubes installed to crank up the output to 100W RMS. Over the years, it was sold twice and always came back to me. It now lives in the garage, where it is doing just fine. I had it out doing vibration measurements several weeks ago; and it sounded as killer as ever. I built the cab using JBL’s specification for minimum cu ft and internal horn path. 3/4”plywood. I’ve had it in my head to spray it with truck bed liner and put some proper corners on it; but, that just never seems to happen. Great cab, if somewhat janky looking.
Thanks, yeah I'm speaker health-conscious these days!
I wanted to get as close to recommended volume as I reasonably could, to get as much punch as the speaker can give. Don't know if too big is a bad thing or not, but it's not really adding any weight at least! The E140 will do that.
Ports are next. Maybe I can just add to them and not destroy the existing. Though they're cardboard.
I dig this 1st gen Trace cab, it's plywood... not as stable or resonance damping as mdf, but a damn sight lighter!
Play about with winISD to discover ''free lunch'' when you are protected from overexcursion at 40hz. You get a bigger bump at 80hz. I am by no means sure it will apply to your box as I have no winISD myself at the moment but as a general rule it should.
Source 4" cardboard tubing from a recycling station or ask about TB for common industrial applications of said diameter tubes.
Source 4" cardboard tubing from a recycling station or ask about TB for common industrial applications of said diameter tubes.
I just have my phone now, but when I reinstate a laptop here I'll do a WinISD run at it, thanks. And thanks for hangin' by man! Much appreciated!
The Sunn Coliseum series was solid state, so if you had a Sunn amp with KT88’s, the guitar models were 1000S, 1200S, or 1500S, all essentially the same amp(the number was different depending if it had rev/term or what speaker cab configuration it was paired with). The iconic 2000S was the bass head. OR you could have had the Model-T, which was an all-purpose top but went through two different versions with a changed pre-amp design.
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