Which (small?) bass horn for Coral 12-inchers?

[atilsley]

I need advice on best (small) bass horn cabinets for these drivers I have spare. They're in good nick. I was thinking of knocking up a 3-way using the matching Coral 5-inchers and dual tweeters....but one of the mids is a bit suss....so I'm leaning towards some horn subs as another fun DIY project.

Paper cone 12" bass driver, about 94 dB sensitivity, lineair upto 3kHz, Re=6.6 Ohm, Fs=44 Hz, Qms=11.8, Qes=0.62, Qts=0.6, Mms=40 g, Cms=0.33 mm/N, Vas=110 L, BxL= 10.8 N/A, L1k=2.6 mH, 60W, 8 Ohm, Japan.

http://www.machmat.com/sales/images2/coral12l25b.jpg

I was thinking about a small folded horn...and am aiming for 45Hz to aroun 150Hz.

Ideas?

Thanks.

[GM]

With this driver's specs, 'small', 'bass', 'horn' are all mutually exclusive. Even a max flat vented alignment is around 408 L, so shrinking it will make it under-damped, requiring stuffing the vent to make it ~aperiodic.

GM

[atilsley]

Thanks GM

William Cowan has nice 'small' horn...and uses x2 10-inch units.

http://www.cowanaudio.com/ (Go to Horn Sub Jr)

Was thinking along these lines with the single 12-inch.

This is just a fun/trial project.....for home use only.

Andrew

[GM]

You're welcome!

OK, add a driver, truncate the horn, but do it with just one driver and its lower corner frequency rises, i.e. no bass unless corner loaded, so with that in mind..........

GM

[Piek]

Is this driver out of the Coral BX series speakers?

Micha

[atilsley]

Micha

Not sure.

I picked up the drivers along with Coral 5-inchers, plus dual tweeters. One of the mids is a little bit suss...hence me playing around with the bass units only.