Source of plans for ported bass cab for 15" spkr?

[tubeswell]

Hi y'all

Trying to remember the dimensions for a 250W-300W 1 x 15" ported bass speaker enclosure (the ones that have the slanted port at the bottom front - underneath the baffle - can you picture it?). I had one in the '80s but time has fogged my total recall ability to remember the dimensions. If anyone can help me out with the dimensions please, that would be Gr8

Cheers

[Steve Conner]

Even if you could remember, the cabinet and port dimensions depend on the speaker you're going to use. You can't take a cabinet designed for one brand of woofer and put another in. (Well, in practice you sort of can, since most 15" woofers have fairly similar characteristics.)

Many speaker manufacturers, like Eminence, suggest what cabinet volume and port tuning frequency to use for their woofers, so you can use that as a starting point.

The slanted port looks cool, but it's a nightmare to retune if you get it wrong. Tubular ports made of PVC drain pipe, or even purpose-made port tubes that you can buy from electronics stores, perform the same function and are much easier to adjust. I like to use several, then you can experiment with the tuning by bunging some of them up with rolled-up socks and the like.

Software like WinISD will tell you what size/shape/number of ports you need for a given tuning frequency. It can do rectangular ports as well as tubes, but it can't do the slanted one. This is an evil cross between a port, a bass horn and a transmission line that you have to tune by trial and error.

[the wizard]

TL606

try the Tl606 here:

http://archives.telex.com/archives/EV/Builders Plans/

[loudthud]

That link is broke. It should be:

http://archives.telex.com/archives/E...rs%20Plans.pdf

Great plans that have been copied by several manufacturers.

[tubeswell]

Thanks Gents - got it working. Solid looking cabs

[Bill Moore]

The TL 606 is a good one.

Built one for my wife years ago, used a EVM15B. The little cabinet will "blow your pant legs", as another bass player said when we brought it to a jam. He complained of bringing such a small amp, until he played through it. Freq. response is good to 40 hz., (open E).