Alpair 12PW Recommended Enclosures

[simplesteve]

I'm building a pair of simple 2 ways, with a front port, and maop-7's and 12 pw's Dave. Cabinets lined - top section top and sides, lower section lined top and down about 10cm (4") below the driver with stuffing very loosely below.
Alpair 7P & Alpair 12PW combination.

[planet10]

This one? http://wodendesign.com/downloads/sim...y-A7pA12pw.pdf

In a BR you line the walls (or at least 3) so as to try to reduce higher frequency reflections. Too much damping screws up the helmholz function of the vent.

dave

[simplesteve]

Yup, that one. I followed guidance from Stefan at KJFaudio for the lining and stuffing. Not sure what the helmholz function is but the vent has been useful when trying to pick up the boxes...!
I want to compare them to my rather expensive (bought) speakers at some stage soon..

[planet10]

helmholz function is but the vent

ie bass reflex

Holes and other features on a box that help with lifting are very useful.

dave

[MITsound]

Originally Posted by planet10

I have not measured these 2 drivers. The few A12p i had were long gone by the time i got any A12pw.

Personally i do prefer the A12pw as a FR over the A12p. It gets far to little love.

dave

In a 7.5ft3 Onken style cabinet, I loved my two way combo of each with a 12P, and a Trace Elliot by Celestion 15” woofer ( I don’t recall the driver #). With a simple 47uF cap on the 12P, and a 12mH inductor on the Trace Elliot, it was great with solid state A or AB, and especially so with a 7 watt SET 300B integrated.
I may do it again. Not super deep, but more than enough, and freaking POWERFUL sounding. The woofer is 98db/ watt.

[planet10]

:^)

Powerful is what i would say just from the description.

dave