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-   -   Alpair12P build possible suggestions? (http://www.diyaudio.com/forums/markaudio/228275-alpair12p-build-possible-suggestions.html)

mikealanlee 20th January 2013 06:25 PM

Alpair12P build possible suggestions?
 
Hi All,

I've recently been reading about the fullrange drivers on the interweb and couldn't resist purchasing a pair of 12p. I finished a mini DSP 2 way with B&C drivers and 2 subwoofers just because I could. Then moved to a small place and had to down size. Even I would like a smaller footprint.

Anyways, to the question. My listening space is roughly 8 X 7 meters and I'd like as small as footprint as possible without giving up much in performance. I know, the eternal question.

Do you experienced 12p builders suggest the pensil or superpensil build for this space? I do not want to use a subwoofer because of the extra footprint, but maybe the regular pensil with bass augumentation is the way to go?

Side note, I have roughly 40 hours on breakin on these so far. Parts express 0.75 cubed feet box ported to around 58hz with topping tp60 as my interim setup. I've had to rethink my views on dynamics with these drivers. They continue to improve and don't feel the need to suppliment the high end. I'm having a tough time keeping the hand away from the increase volume button.

Any suggestions on box type outside of the above is also welcome. Thank you in advance.

vinylkid58 20th January 2013 06:48 PM

Quote:

Originally Posted by mikealanlee (Post 3334787)
My listening space is roughly 8 X 7 meters and I'd like as small as footprint as possible without giving up much in performance.

That's a good sized room. I'd build SuperPencils if the box size appeals to you. Woden Avebury would be really cool, but a much taller and more complex build.

http://www.wodendesign.com/avebury.html

jeff

mikealanlee 20th January 2013 07:15 PM

Thanks for the info Jeff. I will definitely take a look at that design. My initial thinking was the SuperPensil as well but dosen't hurt to take a harder look at all the options, especially since I'm a flip flopper.

I think the 12P will be in the room for an long while so I'm hoping to avoid building multiple enclosures.

I'm starting to understand why some people have such strong feelings regarding fullrange drivers. The Avebury is definitely larger, wow!

Do you feel there is a large difference in extension between the enclosures in a real room environment (of course trying to exclude major room variables)?

Thanks,
Mike

vinylkid58 20th January 2013 07:30 PM

Quote:

Originally Posted by mikealanlee (Post 3334844)
Do you feel there is a large difference in extension between the enclosures in a real room environment (of course trying to exclude major room variables)?

Not having heard the Aveburys, I can only speculate that they could sound very impressive, based on my limited exposure to other smaller Woden designs.

jeff

TiMBoZ 20th January 2013 07:53 PM

Yeah! I like the Woden Avebury for the A12P. It looks an impressive design, but not for the feint of heart. Not the most practical design, but if I had the scope/room for it - I'd love to try that myself someday. I'd just wanna make sure it didn't topple on anyone. But I think it would work great with the A12P.

mikealanlee 20th January 2013 08:16 PM

Quote:

Originally Posted by TiMBoZ (Post 3334890)
I'd just wanna make sure it didn't topple on anyone. But I think it would work great with the A12P.

Good point. I'd probably have to fix the tops to the wall as these will be sitting on carpet. They would be nice to hear for comparison though.

TiMBoZ 20th January 2013 08:46 PM

If you didn't wanna make holes in ceiling, the design could lend itself to some kind of buttress or 'outrigger' type feet to increase the footprint/increase stability. Imagine a couple of half-cylindrical fins/buttresses running down either side - similar to fins on a rocket, tapering towards the top, wider at the bottom. This would also help break up the boxy appearance. It would be a pretty 'committed' build. But end result would be impressive.

planet10 20th January 2013 09:38 PM

A12p is good in about 10-20 litres for a typical vented box. To extract more bass a TL (like the Pensil) or a horn (like Avebury) are needed. You have a pretty big room, Avebury would be stunning. Outriggers with spikes would solve most stabiliy issues.

dave

vinylkid58 20th January 2013 09:57 PM

Quote:

Originally Posted by TiMBoZ (Post 3334890)
I'd just wanna make sure it didn't topple on anyone.

I can see the headlines now, "party-goers crushed by giant speakers".:D

jeff

mikealanlee 21st January 2013 12:21 AM

Thanks for the info guys! Sounds like the Avebury or large TL might be the definitive answer to the space. I'll have to do some more research but its starting to sound like the SuperPensil is a minimum enclosure size for this room if no sub is to be used. The Avebury is a bit ambitous for me right now and I don't want to crush my guest with 73" slab of wood!! Although..........

After the SuperPensil I might take my time and build the Avebury. Thanks for the suggestions, it is what was needed to make the decision.

Looking forward to maximizing this driver, it deserves it!

Best Regards,
Mike


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