Cab for JBL K 140

[zorf]

Thinking about a cab for a JBL K140 i have here.
Pairing it up with some low powered tube amps for a kind of B-15 thing.
Looks like i would need a fairly big box?
Or does this driver work in a non ported box?
Or, maybe just pass it it on to someone else.

 

[Paulabass]

Back 30 years the standard was a K-140 in a TL 606 box. It wasn't designed for this driver, but they went together like peas and carrots.

 

[BassmanPaul]

Back 30 years the standard was a K-140 in a TL 606 box. It wasn't designed for this driver, but they went together like peas and carrots.

Excussseee me! Carrots and Turnip (or Rutabaga) please! Aside from that your post is right on the mark.

 

[Redbrangus]

Ethnic differences in vegetable preferences aside, I really don't think you could do better than the EV TL-606 enclosure for that driver. JBL did publish some plans for a 3.5 cubic foot bass-reflex box in their enclosure building guide that they produced in the early '70s...they are out there on the Inter-webs. (The Altec Heritage site has everything that JBL ever published about building enclosures.) That box was about 30" x 24" x 11-ish", IIRC, and there are various duct-lengths given to tune them to the desired frequency. But IMO the 606 box is the way to go. I think it has a better form-factor and the performance is ever bit as good, if not better, as the JBL box...and I have built and used both. In fact, I'm considering building a couple more just for fun...I've got a bunch of E-140s that need to be somewhere, and two of those under my venerable 800RB is probably way more rig than I'd ever need.

 

[zorf]

thanks for the info!