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JBL4607 4507 port mod, w/wo 3015lf
JBL4607 4507 port mod, w/wo 3015lf
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Old 9th May 2014, 10:12 PM   #21
screamersusa is offline screamersusa  United States
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Quote:
Originally Posted by GM View Post
OK, what is the max HxWxD o.d. dims you can can live with?

BTW, what are the Kappalite's specs? I just noticed I have several different sets and they're not close enough to just use the mean. The most conservative set dictates at least a 10 ft^3 cab to get down to 40 Hz.

GM
Hard to accurately say without actually packing the car. I could probably fit the
4607 type pair in there, probably not a pair of ss15, maybe a tham15 pair.
There's the fearfull cabs too but I don't expect a belly button thump out of em as I had a cab almost exactly like that and it had no "cahones".
The ss15 was my first choice,fyi. I'll probably use them with my Elec drums
as well when I play out as a drummer.
10 cu ft!!! Maybe I should just put a baffle in my hatchback and pull it inside the club
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Old 9th May 2014, 10:54 PM   #22
GM is offline GM  United States
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Maybe.......... the 4507 [I could find no 4607 on JBL Pro's website] is 5 ft^3 net: http://www.jblpro.com/pub/cinema/4647a.pdf http://www.jblpro.com/pub/obsolete/L...nclosures1.pdf

GM
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Old 10th May 2014, 02:01 AM   #23
screamersusa is offline screamersusa  United States
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Default I have a size to work with

I figured the subs will sit on the end, first in last out.
Looks like I have space for two cabs at the following max dims....

Height 32 in
width 21 or 21.5"
Depth about 20"
Per box.

ss15 too deep but frustratingly close.
bjorno too long n wide.
tham maybe.
4507 type cab will fit.
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Old 10th May 2014, 02:15 PM   #24
GM is offline GM  United States
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OK, so ~6.53 ft^3 gross or ~6 ft^3 net and if no actual measurements are made, then the design would have to be made based on a worst case set of specs and if a 30 Hz tuning is desired, then there's going to potentially be power handing issues since one set of specs has a 44 Hz Fs.

GM
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Old 10th May 2014, 03:46 PM   #25
screamersusa is offline screamersusa  United States
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Default Decision made

I decided to leave the 4507/4607 stockw/driver as a stage monitor.
I'm gonna bite the bullet and whip up a couple of tham 15 as I should be able to
pull that off. I'm spoiled by the authoritative kick of tapped horns anyway.
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Old 10th May 2014, 03:47 PM   #26
screamersusa is offline screamersusa  United States
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I'd also like to say I REALLY APPRECIATE the input from you guys... Thank you VERY much.
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Old 10th May 2014, 04:57 PM   #27
tb46 is offline tb46  United States
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Hi screamersusa,

Post #25: "...whip up a couple of tham 15..."

I looked at the 3015LF in the THAM15 a while ago. I would not recommend it. When you are going that small w/ the 3015LF it creates a nasty looking bottom peak, and will need a high pass filter around ~34Hz; after that the response will be down 10dB @ 40Hz. You should get better response and extension w/ your 4507s.

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Attached Images
File Type: jpg THAM15_3015LF_Input.jpg (125.3 KB, 65 views)
File Type: jpg THAM15_3015LF_SPL.jpg (105.6 KB, 108 views)
File Type: jpg THAM15_3015LF_Displacement.jpg (89.0 KB, 63 views)
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Old 10th May 2014, 11:30 PM   #28
screamersusa is offline screamersusa  United States
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TB46 Thats certainly a depressing consideration.... hmmmm
I feel like a bit of an idiot cuz I went to pick up the 4507 today and DAMN it's too heavy... Flakeboard!!!!!!!!! I remembered moving plywood versions of that cab and they were not that heavy... Not gigable so I passed on the orig JBL box.
So I'll have to build two boxes that will fit in the suv.
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Old 11th May 2014, 04:02 AM   #29
tb46 is offline tb46  United States
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Hi screamersusa,

That's why jbell designed the SS15 w/ 1/2 plywood.

What you might want to do is rescale the SS15 and the THAM15 to fit your 32Hx21Wx20D box dimension, and then see what the result looks like in Hornresp. A rescaled SS15 would probably have a very similar response to the original SS15, you would have to fiddle a little w/ the baffle board(s) to make the 3015LF fit because of the reduced depth.

A BR w/ your basic dimensions may still be your best bet.

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Old 11th May 2014, 04:05 AM   #30
GM is offline GM  United States
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Quote:
Originally Posted by tb46 View Post
I looked at the 3015LF in the THAM15 a while ago. I would not recommend it.
I don't see it as an issue since there's considerable acoustic damping of this peak in high power apps, but blocking off S1 to 0.01 cm^2 and damping segment 3 with some polyfil apparently solves the problem good enough, at least for me:

GM
Attached Images
File Type: gif Eminence Kappalite 3015LF THAM TH - mod.gif (21.3 KB, 55 views)
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