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Alpair 6M for Cyburgs Needle / BR M.A. Design
Alpair 6M for Cyburgs Needle / BR M.A. Design
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Old 25th January 2018, 06:25 PM   #1
grahamgraham is offline grahamgraham  United Kingdom
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Default Alpair 6M for Cyburgs Needle / BR M.A. Design

Hi all.

I am about to order some Alpair 6m drivers as they are priced very reasonably here in the UK and have good reviews.

I plan to use them in two configurations. The first is the Cyburgs Needle. The main thread on the needle suggests it will, has anyone had any experience? I want to build these just to switch up from my main set up for a while in my front room.

After I have had my fun I want to use these drivers as 5.1 surrounds in the mark audio recommended BR enclosure.

https://www.madisoundspeakerstore.co...lpair6M-BR.pdf

Has anyone had any experience with this cabinet and driver? Will it be appropriate for surrounds in a set up consisting of 5" woofer/tweeter speakers for LCR? I understand one should try to match each speaker in a 5.1 but GF isn't having it.

I see the Planet 10 tube vented design that looks similar in size but with a much larger port. Is this design superior?

In both instances the speakers will be driven by the HIFImeDIY T1-M amp supposedly putting out 50 watts ish.

Also, any thoughts on using and working with the Alpair 6m are appreciated!

Thanks!

Last edited by grahamgraham; 25th January 2018 at 06:27 PM.
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Old 25th January 2018, 06:39 PM   #2
grahamgraham is offline grahamgraham  United Kingdom
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Anyone had any experience with this cab?

file:///C:/Users/theli/Downloads/Alpair6.2TL.pdf
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Old 25th January 2018, 06:47 PM   #3
planet10 is offline planet10  Canada
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Alpair 6M for Cyburgs Needle / BR M.A. Design
I’d be careful about putting the A6.2m in a random ML-TL like the Cyburgs. It could work fine.

Scott did an ML-TL for the A6.2s but we were loath to release it because we figured that it put too much load on the drivers. Since then a Baby Lab has been released, being a tapered TL aimed at the desktop not as much load.

If you point me at the needle i can compare it to the Woden A6.2 specific line… i might even draw that one up and release it.

The A6.2 does work well in the Frugel-Horn Lite and provides a shocking amount of bass (really the 1st harmonic, but you don’t notice that until directly compared to a box that really goes down).

The Mark Audio relflex is a bit smaller than the optimum Mar-Ken but it should be fine… i am not a huge fan of conventially round pipe vents.

dave
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Old 25th January 2018, 06:48 PM   #4
planet10 is offline planet10  Canada
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Alpair 6M for Cyburgs Needle / BR M.A. Design
Quote:
Originally Posted by grahamgraham View Post
file:///C:/Users/theli/Downloads/Alpair6.2TL.pdf
That link is to something on your hard drive, its not going to work.

dave
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Old 25th January 2018, 06:54 PM   #5
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Graham - I've not heard the MA website BR design, but have lots of experience with numerous Fostex and MA drivers in smallish vented designs. As I did over a dozen years ago with MDF vs BB ply, some time ago I built a couple of pairs of small BR boxes for Fostex FE series drivers with both round ports and DaveD's narrow slot ports.

I only have my anecdotal subjective observations - which apparently doesn't qualify as a data-set - but I've always found the high aspect ratio slot vents to deliver smoother bass response from just above the tuning frequency to below than the round ports.

This little guy http://frugal-phile.com/boxlib/P10free/mMar-Ken6-1v0-map-231009.pdf
is one of Dave's designs that sized and vented accordingly has been very successful with a wide range of drivers in this size class

For a compact floorstander similar to the footprint of the Needle, there's probably a Pensil - another topology with which I've had some experience - and then as Dave notes, the FH-lite
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Last edited by chrisb; 25th January 2018 at 06:59 PM.
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Old 25th January 2018, 06:59 PM   #6
planet10 is offline planet10  Canada
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Alpair 6M for Cyburgs Needle / BR M.A. Design
I forgot to mention Chris’ A6m surrounds… we put them into a specially shaped (to aim them properly when mounted up in the corners) 2 litre sealed box.

Note that the mMar-Ken chris points at is for the A6 (Gen 1) and while it is close to the A6p millSize, it is too large for the metal cone driver.

dave
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Old 25th January 2018, 07:00 PM   #7
grahamgraham is offline grahamgraham  United Kingdom
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Alpair 6M | Markaudio


The Kurt Nielsen's 1-13.2 TL design.


Quote:
Originally Posted by planet10 View Post
That link is to something on your hard drive, its not going to work.

dave
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Old 25th January 2018, 07:03 PM   #8
grahamgraham is offline grahamgraham  United Kingdom
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Thanks, good advice. I was drawn to the Cyburgs as people say it works with a wide range of drivers but when something sounds to good to be true... I could just burn them if they don't work.

The Baby Labs you mention, could you point me in the right direction for these, please?

I want these to be thin and floor standing for the first phase in my plan.


Quote:
Originally Posted by planet10 View Post
Iíd be careful about putting the A6.2m in a random ML-TL like the Cyburgs. It could work fine.

Scott did an ML-TL for the A6.2s but we were loath to release it because we figured that it put too much load on the drivers. Since then a Baby Lab has been released, being a tapered TL aimed at the desktop not as much load.

If you point me at the needle i can compare it to the Woden A6.2 specific lineÖ i might even draw that one up and release it.

The A6.2 does work well in the Frugel-Horn Lite and provides a shocking amount of bass (really the 1st harmonic, but you donít notice that until directly compared to a box that really goes down).

The Mark Audio relflex is a bit smaller than the optimum Mar-Ken but it should be fineÖ i am not a huge fan of conventially round pipe vents.

dave
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Old 25th January 2018, 07:05 PM   #9
grahamgraham is offline grahamgraham  United Kingdom
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Thanks, that's all very interesting. I might try some rectangular vents then later down the line and see.

Who doesn't like non-empirical statements!

Quote:
Originally Posted by chrisb View Post
Graham - I've not heard the MA website BR design, but have lots of experience with numerous Fostex and MA drivers in smallish vented designs. As I did over a dozen years ago with MDF vs BB ply, some time ago I built a couple of pairs of small BR boxes for Fostex FE series drivers with both round ports and DaveD's narrow slot ports.

I only have my anecdotal subjective observations - which apparently doesn't qualify as a data-set - but I've always found the high aspect ratio slot vents to deliver smoother bass response from just above the tuning frequency to below than the round ports.

This little guy http://frugal-phile.com/boxlib/P10free/mMar-Ken6-1v0-map-231009.pdf
is one of Dave's designs that sized and vented accordingly has been very successful with a wide range of drivers in this size class

For a compact floorstander similar to the footprint of the Needle, there's probably a Pensil - another topology with which I've had some experience - and then as Dave notes, the FH-lite
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Old 25th January 2018, 07:05 PM   #10
chrisb is offline chrisb
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Graham - note that as Dave commented above re the mMarKens I mentioned above, and the Pensil on Mark Audio site are for the earlier A6 - although for intrepid modelers the revisions required to suit the newer A6.2's T/S parameters should be a piece of cake - indeed, may have already been calculated, just not published yet?
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