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Old 6th September 2013, 02:18 AM   #1
a3cervo is offline a3cervo  Philippines
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Default Need advice for Alpair 10p build

Hi. I'm new here and I am planning to build my first full range speakers. I am seeking for enclosure/box advice which would suit my need, can be a floor stander or stand mount. It will be used for nearfield listening, about 1.25 to 1.5 meters from listener and can be placed 1.5-2ft from the wall. Will hook it up to a Macbook pro>ODAC>Arcam A65+ amp (a tube amp hopefully in the near future). Room size is 4X4m with 9Ft ceiling, a small office/listening room. I am completely newbie in building enclosures but a friend who makes furniture can help me out so difficult to build enclosures won't be a hindrance.

Thanks in advance!

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Old 6th September 2013, 05:43 AM   #2
a3cervo is offline a3cervo  Philippines
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btw, I listen to different music genres but mostly jazz, classical & acoustic rock all lossless files from 16/44.1 to 24/192. thanks!
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Old 6th September 2013, 06:40 AM   #3
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A10p is a nice driver. So far i've only heard it in Frugel-HornXL.

I have designed the 1st of 2 Mar-Ken trapezoids for these, drom which will come rectangular Mar-Kens and a CGR (which will be posted for free use)

Scott also did a simple BR & a Pensil for them.

dave
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Old 6th September 2013, 07:16 AM   #4
a3cervo is offline a3cervo  Philippines
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Quote:
Originally Posted by planet10 View Post
A10p is a nice driver. So far i've only heard it in Frugel-HornXL.

I have designed the 1st of 2 Mar-Ken trapezoids for these, drom which will come rectangular Mar-Kens and a CGR (which will be posted for free use)

Scott also did a simple BR & a Pensil for them.

dave

Hi Dave,

I've been looking at built Mar-Kens here in daiyAudio for several weeks now and to tell you honestly it's at the top of my list. I like the design a lot, those with real wood veneer finishes are simply gorgeous.

Will it give sufficient low end if used nearfield? I'm not looking for heart-thumping bass but something accurate is what I want. The room is not acoustically treated, 4 concrete walls, a desk & some photography stuff. I also have a pair for 30" solid wood speaker stands which I use right now with my 2 way speakers.

thanks for taking time to reply.
Anton
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Old 6th September 2013, 04:36 PM   #5
chrisb is offline chrisb  Canada
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Anton; I've had enough experience with numerous Fon / Mar-Ken enclosures, and several Pensils to anticipate the generic differences in performance between them for most drivers.

Pensils (or any full size MLTL) would deliver deeper bass extension, while the "Kens" would have a higher but very smooth roll-off.

Your room size and listing distance are such I'd opine the MarKens would be sufficient, and you already have stands. Depending on driver placement on Dave's drawings, you might need to invert the cabinets on the 30" stands.

Not to second guess your woodworking skills, but the traps can be a bit challenging for a first timer, while the rectangular and CGRS are pretty straight forward.
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Old 6th September 2013, 07:12 PM   #6
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The design of all the miniOnkens is intended to maximize the finese and acciracy of the bass. They go as low as the go. For your use that should be more than sufficient.

For the A10p there are 2 sizes of Mar-Ken, so far i have only drawn the smaller one, but it would not take long to get done with-ever one you require (they all have to get drawn eventually)

The larger one gets another 5-10 Hz extension at the bottom.

dave
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Old 7th September 2013, 02:54 AM   #7
a3cervo is offline a3cervo  Philippines
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@chrisb: thanks for the input, now i'm leaning towards the Mar-Ken.when you say "invert" the cabinets, is it the same as "toe in"?

you are right about the traps, looking at it i'm thinking the degree of difficulty is not for a starter like me, guess I have to show my furniture maker buddy the plans and see if he can be more patient with me & help me out in building a pair. But either way I'm ok with the rectangular one, the fascia is what really captured me


@Dave: i'm eyeing the Mar-Ken10. hoping the plans will be available soon, quite excited about this build. thanks for the help.


thanks for the insight guys, it encourages newbies like me to pursue the DIY route which I think & hope would be more satisfying than buying off the shelves. btw, here is what I currently use in my listening room. the stands in the pic is what I'm gonna use with my future A10P.
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Old 7th September 2013, 06:34 AM   #8
chrisb is offline chrisb  Canada
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anthony - by inverted I meant sit "upside down" on the stands

I've built more than a few of Dave's miniOnken based designs, and generally the driver is not vertically centered on the front baffle, so inverting them could place the drivers as much as several inches lower, if that becomes an issue when using your existing stands. OTOH, some situations or personal preferences call for higher acoustic centers for drivers than I tend to use, which is between 30-32".
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Old 7th September 2013, 04:23 PM   #9
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What is a Frugel-horn XL?
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Old 7th September 2013, 06:19 PM   #10
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A larger FH for the Alpair 10p, A10.3.

It has passed the initial beta stage.

dave
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