View Full Version : Port tube availability ?

12-21-2004, 11:29 PM
I was wondering if the port tubes for a set of 4311b's were still available retail through JBL? And isn't there a tube behind either the tweeter or midrange as well? My memory is fading! Anyway, same question as above for that tube also. I have the drivers, am missing ports and need to make some cabinets to get these things in use again. I looked on the web site, but might have missed it as I didn;t see anything. Thanks


12-22-2004, 05:50 AM
Neither the port tubes nor the subenclosures have been available through JBL. You can find the port tubes on eBay.

The subenclosures can be made from 5" or 6" diameter tubes so that the internal volume is ~ 80 cubic inches.

JBL often used the following dimensions for their subenclosures:

5-5/16" internal diameter x 3-1/4" depth
5-11/16" outside diameter x 3-5/8" depth
recessed into 3/4" thick baffle by 3/8"

12-22-2004, 06:48 AM
The subenclosures can be made from 5" or 6" diameter tubes so that the internal volume is ~ 80 cubic inches. Yea, buzzmar -

I don't know where you're located, but if you're needing some lengths of that 6" tube, I've got ample left from prior DIY projects. Lemme know... :)

12-22-2004, 09:07 AM
Any good ideas on a good substitution? Are the L100 tubes (or any others) and the 4311b tubes the same. I am trying to match my other set of 4311b's as closely as possible


12-22-2004, 09:15 AM
Ok, I lied. :rotfl:

JBL appears to have some left and is willing to sell them regardless of the "Not for Sale" notice. :p

Have your favorite Authorized JBL Service Center order you a pair.

Part number is 52211.

Mr. Widget
12-22-2004, 09:48 AM
JBL is so weird...

12-22-2004, 10:24 AM
That parts list is a fun perusal. They've got labels for 4345's, and grilles for 4313's, as I recall. :cool:

OH, and 4430 crossovers for $565. [Must be runnin' out of them....]

Oddly, the 4435 ones are only $313. :D

Mr. Widget
12-22-2004, 10:29 AM
Zilch, I meant to tell you via e-mail, but those crossovers have been NLA for quite some time. A great deal of the "vintage" parts listed are NLA and they still update the prices and keep them listed. See my post above.


Charley Rummel
12-26-2004, 07:48 PM
Has anyone here ever used pvc pipe for ducts? Any pros or cons to share?


Alex Lancaster
12-26-2004, 08:49 PM
:) Ive used them a lot, they work great.

12-26-2004, 08:54 PM
:) they work great.Ditto

12-27-2004, 07:39 PM
:) Ive used them a lot, they work great.

In Triplicate...

(ie, ditto again :D )

It's either that, or left-over cardboard Sonotube/packing tubes... pretty much interchangable, to my purposes.


12-30-2004, 11:49 AM
well, does anyone know what the dimensions of said port and subenclosure for the midrange driver should be? There is a pair of ports from an L-65 Jubal on ebay, are those the same size? anyone have a parts list for the Jubals to check?


12-30-2004, 12:00 PM
The L65 ports are the same. Buy them.

I already posted the dimensions of the subenclosure above.

12-30-2004, 12:46 PM
JBL is so weird...I'm working in the storage businnes. My company build the "future DC" (Distribution Center) for Walgreens.

So I'm shocked about JBL's way to handle the parts storage. There must be hundreds of storage workers running around to pick all the parts they need to run their daily production. Not to think about the spare parts service :biting:

I always dream to check out the JBL Warehouse and every piece I find which is not registrated in their computers is MINE.

Call me EBAY Millionaire :cool: