Arny Krueger wrote:

The simple fact is that by modern standards, B139s are pretty mediocre
subwoofer drivers. They were never much more than fairly good plain
old woofers.

Where does it say that I have to adhere to modern standards? I 'eard 'em in
the Linns and they sounded better than my room can do justice to, so why
should I want to go even better?


*real* subwoofer drivers don't need kludges like "isobaric" cabinets
to outperform any reasonable requirements.

Name a driver, and enclosure design/volume, that you recommend instead.


If money is tight, auction off the B139s and use the cash to buy a
real subwoofer driver.

If I did that, there'd be big holes in my present speakers.


Oh, and if you are building a subwoofer, forget transmission lines.
They are basically a waste of good box volume.

Looks like I'll have to scupper the Nautilus copies built out of plywood and
car body filler, then...


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.