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Author Topic: JBL 4507 sub?  (Read 6899 times)

Mark Gensman

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JBL 4507 sub?
« on: February 16, 2011, 07:39:16 pm »

There are two JBL 4507 subs for sale for dirt cheap locally. I found it difficult to find anything about them except they are a five cubic foot box with a single 15.

Any of you old timers know anything about these boxes?
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Mark G.

Silas Pradetto

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Re: JBL 4507 sub?
« Reply #1 on: February 17, 2011, 11:37:16 am »

That's so old it's probably loaded with a 2220 or worse. Not worth anything these days.

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John Cameron

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Re: JBL 4507 sub?
« Reply #2 on: February 17, 2011, 04:19:14 pm »

Is this it? http://www.jblpro.com/pub/cinema/4647a.pdf


If yes it has a 2226h which is's that bad.
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Lee Brenkman

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Re: JBL 4507 sub?
« Reply #3 on: February 17, 2011, 06:26:08 pm »

JBL "product number code"

45**  indicates an enclosure

46**  indicates a low frequency  enclosure with driver installed


or at least that's the way it was when this was a current model.
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Mark Gensman

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Re: JBL 4507 sub?
« Reply #4 on: February 17, 2011, 07:41:21 pm »

Thanks for the response.

I thought that perhaps picking them up and loading them with either a Peavey Black Widow or Eminence Kappa Pro 15 would make a nice pair of small portable subs for a "B" rig.
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Mark G.

jeff harrell

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Re: JBL 4507 sub?
« Reply #5 on: February 17, 2011, 07:48:53 pm »

Mark Gensman wrote on Thu, 17 February 2011 16:41

Thanks for the response.

I thought that perhaps picking them up and loading them with either a Peavey Black Widow or Eminence Kappa Pro 15 would make a nice pair of small portable subs for a "B" rig.
the problem is the internal air volume and the port size needs to match the mechanical/electrical properties of the driver to get the right results. there are formulas that are used for this.
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Mark Gensman

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Re: JBL 4507 sub?
« Reply #6 on: February 18, 2011, 03:02:24 am »

jeff harrell wrote on Fri, 18 February 2011 00:48

Mark Gensman wrote on Thu, 17 February 2011 16:41

Thanks for the response.

I thought that perhaps picking them up and loading them with either a Peavey Black Widow or Eminence Kappa Pro 15 would make a nice pair of small portable subs for a "B" rig.
the problem is the internal air volume and the port size needs to match the mechanical/electrical properties of the driver to get the right results. there are formulas that are used for this.



Thanks, I knew that.. I will need to get the specs on the original jbl drivers first.
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Mark G.

Art Welter

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Re: JBL 4507 sub?
« Reply #7 on: February 20, 2011, 04:26:02 pm »

Mark Gensman wrote on Fri, 18 February 2011 01:02

jeff harrell wrote on Fri, 18 February 2011 00:48

Mark Gensman wrote on Thu, 17 February 2011 16:41

Thanks for the response.

I thought that perhaps picking them up and loading them with either a Peavey Black Widow or Eminence Kappa Pro 15 would make a nice pair of small portable subs for a "B" rig.
the problem is the internal air volume and the port size needs to match the mechanical/electrical properties of the driver to get the right results. there are formulas that are used for this.



Thanks, I knew that.. I will need to get the specs on the original jbl drivers first.

"4500 SERIES: UNLOADED LOW FREQUENCY ENCLOSURES
4507 5 cubic foot vented enclosure tuned to 40 Hz, for single 15” driver (OBS)"

Since one could load almost any 15" into the enclosure, it is a crap shoot what speakers are in the enclosure. Some JBL 15" are worth a lot of money to certain Hi Fi enthusiasts.

The 5 cubic foot 40 Hz box tuning will work well with lots of 15" speakers, but IIRC the ports are not very large or deep, and would run out of gas at high power with many current drivers that have about twice the excursion of older drivers.

Installing larger, deeper ports is certainly easier than building new cabinets, if the price is right, go for it.
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Mark Gensman

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Re: JBL 4507 sub?
« Reply #8 on: February 21, 2011, 02:11:52 am »

Art Welter wrote on Sun, 20 February 2011 21:26


"4500 SERIES: UNLOADED LOW FREQUENCY ENCLOSURES
4507 5 cubic foot vented enclosure tuned to 40 Hz, for single 15” driver (OBS)"

Since one could load almost any 15" into the enclosure, it is a crap shoot what speakers are in the enclosure. Some JBL 15" are worth a lot of money to certain Hi Fi enthusiasts.

The 5 cubic foot 40 Hz box tuning will work well with lots of 15" speakers, but IIRC the ports are not very large or deep, and would run out of gas at high power with many current drivers that have about twice the excursion of older drivers.

Installing larger, deeper ports is certainly easier than building new cabinets, if the price is right, go for it.


They are going for $100 a box and you are correct, it's fairly easy to install larger deeper ports.

thanks...
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Mark G.
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