Alpair 7.3 Bookshelf Bass Reflex? - diyAudio
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Old 2nd May 2012, 04:11 PM   #1
StevenZ is offline StevenZ  United States
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Default Alpair 7.3 Bookshelf Bass Reflex?

Hey guy,

So I've been playing with my Alpair 7.3's lately and have put them in a small 7l sealed enclosure for office duties. They're lacking a bit of bass and I was wondering if anyone out there had any cabinet plans for a 7.3 bookshelf made out of 18mm material. Any help is appreciated!

Thanks,
Steven
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Old 2nd May 2012, 05:59 PM   #2
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Hi Steven,

To get any bass out of A7.3 you really need a box with a hole in it, and if it is a bookshelf then it is likely a reflex enclosure (althou, the folded halfTower ML-TL should do reasonably well with the A7,3)

dave
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Old 2nd May 2012, 06:14 PM   #3
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Hey,

I use the EL70 in a 7L sealed box on my desk and it's pretty bass shy. I knew it would be. So I add bass boost. Tons of it. Works like a charm. I also correct for baffle step with the same program. I've just been using Realtek in windows.

You can see what I did here
Click the image to open in full size.

I may upgrade these to the alp 7 one day.
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Old 2nd May 2012, 07:33 PM   #4
StevenZ is offline StevenZ  United States
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Quote:
Originally Posted by planet10 View Post
Hi Steven,

To get any bass out of A7.3 you really need a box with a hole in it, and if it is a bookshelf then it is likely a reflex enclosure (althou, the folded halfTower ML-TL should do reasonably well with the A7,3)

dave
Thanks Dave. Any chance you could whip up a quick bass reflex bookshelf for the A7.3 using 18mm material? I doubt I'm the only guy here that could use an enclosure like this. Also, any idea where I can get the detachable outter mounting rings? I seem to have misplaced the 2 that came with mine.

Thanks,
Steven
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Old 2nd May 2012, 08:17 PM   #5
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Hi Steven,
For various plans, take a look at:
p10 hifi | Box Library / Mark Audio
Plans | Markaudio

You'll find some BR plans in the Alpair 7 plans section on the Markaudio site

Thanks
Mark.
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Old 2nd May 2012, 08:29 PM   #6
StevenZ is offline StevenZ  United States
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Thanks Mark!
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Old 2nd May 2012, 08:33 PM   #7
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by tuxedocivic View Post
Hey,

I use the EL70 in a 7L sealed box on my desk and it's pretty bass shy. I knew it would be. So I add bass boost. Tons of it. Works like a charm. I also correct for baffle step with the same program. I've just been using Realtek in windows.

You can see what I did here
Click the image to open in full size.

I may upgrade these to the alp 7 one day.


I think that's definitely something not to try with any of the Alpairs - the really does like a vented or MLTL - I have several examples of them, and for a non-floorstander, the resistively ported 'Kens are very nice.
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Old 2nd May 2012, 08:35 PM   #8
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Originally Posted by chrisb View Post
the resistively ported 'Kens are very nice.
Yes they are.

jeff
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Old 2nd May 2012, 09:31 PM   #9
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Quote:
Originally Posted by StevenZ View Post
Thanks Dave. Any chance you could whip up a quick bass reflex bookshelf for the A7.3 using 18mm material? I doubt I'm the only guy here that could use an enclosure like this. Also, any idea where I can get the detachable outter mounting rings? I seem to have misplaced the 2 that came with mine.
A7.3 Planset is littered with them :^)

Including the CGR Mar-Ken7.3. Or you could adapt the free 15mm plans.

I could suggest a vent for your current boxes (but i am currently away from my software), but with the caveat that i feel a regular tubular port has some downsides i don't like.

dave
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Old 2nd May 2012, 09:40 PM   #10
StevenZ is offline StevenZ  United States
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Interesting. I've run a couple sims using WinISD and have found a .5ft box tuned to 50hz to be just about perfect. Flat all the way to 50hz. This is using a 2" port with a 5.18" length. Would this enclosure size and porting offer any advantages or dissadvantages over the MarkAudio supplied plans spec'ing 8l boxes tuned to 58hz? Perhaps lower power handling, etc.? Also, what's the going rate for a planset?

Thanks,
Steven
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