BillFitzmaurice.info

Between 21" and 24" not huge with four cabs. Remember you can use scraps you have lying about for the braces.

The wider the better, so do what you must. But remember that you only get one chance to do it right the first time.

It is.

Theaters don't go after sub 20 Hz content, not even IMAX. The size and cost of the gear is excessive. For the most part they're content with 30 Hz.

With respect to rotary subs, it was a thing many decades ago, when we didn't have the low frequency drivers we've had since the turn of the century. Now they're a curiosity, no more relevant than dial up internet access.

An audiophool would say so.

The Lavoce WAN 123.00 is very close to the 3012HO and may be less expensive in some locales. The WAF 122.50 is considerably less expensive and also works quite well, it's just heavier.

No measurable difference either, so long as the bottom of the cab is less than 1/4 wavelength from the ground. At 100Hz that's 85 Cm.

3/8 radius plastic corners will work with a 1/4 radius chamfer. They're not ideal but they'll do.

For two channel music your LaScala should suffice without a sub, unless you're into techno or DUB or the like, especially as with sufficient EQ the LaScala is perfectly capable to 40Hz. It may take 10dB of EQ boost but thanks to the 105dB sensitivity of the LaScala that shouldn't be a problem for ei...

Once again, the T24 is a pro-sound sub, not HT. It's meant to go loud, not low. The driver size doesn't determine how low the speaker will go, that's defined by the horn. You seem determined to have a horn sub that's smaller than your mains. It doesn't work that way. The size of the horn required is...

All the TT variants have about the same response. My TT 2x4 is good to 30Hz.

TTLS profile is 15 x 60 inches. TT 2x4 profile is 23 x 47 inches.

T24 isn't a HT sub, it's pro-sound. As for stacking subs and mains that's almost always a bad idea, as subs and mains very seldom work best within the same footprint. The room acoustics that determine the best placement are very different for mains and subs.

You may, but it's got to be airtight.