Threaded Drivers?

[Old Guy]

I concur one is and one is not, forget which is which though.

The ones I bought to mate K-55 w/511b were plastic if that helps. Had to drill (2) mounting holes, no big deal.

That would be the female threaded one

You will pay a 5 spot or so more for the Paudio but it's metal and has JBL 3 bolt and Altec 2 bolt patterns
http://www.paudiothailand.com/pdf/products/PC-25.pdf

It is aluminum if this week's spec sheet is accurate

For me a no brainer, to heck with the plastic
Just looked at the male it's aluminum also
http://www.paudiothailand.com/pdf/products/PC-35.pdf

finally found the selenium pdf

http://www.aalse.ru/ADM2525.pdf

Selenium is fond of "injection molded aluminum" they use it a lot

I don't think the selenium is as sturdy...my opinion

[bfish]

Carl, I don't think the 1-3/8" 18 TPI dimension correlates to any pipe standard, though it's certainly OD. The threads are non-tapered, and the "snout" bottoms out in the horn. There may be a standard conduit fitting that could "work".

Do any of the threaded adapters have internal expansion, or are they a fixed ID throughout? The only one I ever used was on a Leslie, where the flare rate is already scr... uhmm... less-than-optimal.

Just wondering if it might not be better to use some of the newer threaded drivers (like B&C) that allow uninterrupted expansion to a threaded horn, than to throw a kink in the works with an adapter?

[Old Guy]

If you are looking at threaded drivers...look at the selenium 220

I know of at least 20 folks who replaced their cheapie thread on JBL's, and it's night and day...the selenium wins by miles..

They CAN be crossed as low as 1200 BUT power handling goes way down...it's 80 at 1600, probably only 30 or so at 1200.

I'm on record as not liking titanium frams. Mostly, it's when titanium breaks up.

And titanium doesn't make a good surround.

Selenium puts ridges in the fram to stiffen it so it doesn't break up, or at least breaks up less. And mylar surround.

The best part? 45 bucks new. Cheap frams too,

It ain't a tangerine 808. I might put it against an 807 though. It's bandwidth is shifted upward like the ceramic Altecs...won't go as low as the 807 but goes higher...

You can get a better sounding driver...but for 3x the price.

Parts-Express.com:Selenium D220Ti-8 1" Titanium Horn Driver 8 Ohm 1-3/8"-18 | Selenium D220Ti-8 D220ti drivers driver AudioKarma EconoWave econo wave diaphragm d210Ti compression drivers compression driver compression hf high frequency horn horn dri

http://www.parts-express.com/pdf/264-270s.pdf