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Old 10th November 2020, 08:35 PM   #41
simplesteve is offline simplesteve  United Kingdom
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Alpair 12PW Recommended Enclosures
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.

Last edited by simplesteve; 10th November 2020 at 08:37 PM.
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Old 10th November 2020, 08:47 PM   #42
planet10 is offline planet10  Canada
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Alpair 12PW Recommended Enclosures
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
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Old 10th November 2020, 08:55 PM   #43
simplesteve is offline simplesteve  United Kingdom
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Alpair 12PW Recommended Enclosures
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..
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Old 10th November 2020, 08:57 PM   #44
planet10 is offline planet10  Canada
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Quote:
helmholz function is but the vent
ie bass reflex

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

dave
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Old 11th November 2020, 01:38 AM   #45
MITsound is offline MITsound  Canada
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Originally Posted by planet10 View Post
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 15Ē woofer ( I donít 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.
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Old 11th November 2020, 02:24 AM   #46
planet10 is offline planet10  Canada
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:^)

Powerful is what i would say just from the description.

dave
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Old 26th February 2021, 04:31 AM   #47
ndp is offline ndp  United States
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Originally Posted by simplesteve View Post
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..
Any update, or listening impressions, and comparison's? I'm interested in building a set of these, or something similar.
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Old 26th February 2021, 04:39 AM   #48
ndp is offline ndp  United States
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Originally Posted by planet10 View Post
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
Dave, are there any alternative WAW plans available using the 12pw and 7p that have a developed passive crossover? I don't have the option of biamping and no DSP at the moment.

Quattrofish build looks very interesting. Would these be considered a massive step up from the free "simple" bass reflex plans?

Alpair 7.3eN/12pw WAW build
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Old 26th February 2021, 04:57 AM   #49
planet10 is offline planet10  Canada
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Alpair 12PW Recommended Enclosures
Do you alreasy have A7p. Dan built the big A12pw MTM with the passive and the A7p. He is happy.

Nanosaurus has some suggested XOs to go with a range of MA midTweeters, none of those A7p. But it could be.

We have also started scheming on a big twin A12pw with A7ms (A7.2/A7HD, A7p i guess).

dave
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Old 26th February 2021, 05:40 AM   #50
ndp is offline ndp  United States
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Do you alreasy have A7p. Dan built the big A12pw MTM with the passive and the A7p. He is happy.

Nanosaurus has some suggested XOs to go with a range of MA midTweeters, none of those A7p. But it could be.

We have also started scheming on a big twin A12pw with A7ms (A7.2/A7HD, A7p i guess).

dave
Don't have the 7p yet. Just noticed they were on sale and thought about picking up a pair.

That's actually when I saw the .PDF for the "simple" WAW design. After doing a little Google it led me to the Quattrofish thread.

I just read through most of the MTM build thread, pretty interesting.
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