Hello dear DIY Forum members!
As a new member, I would like to introduce myself. My name is Gerd and I live on the southern, outer green belt of Cologne, near the Rhine.
I intend to build a reflex shelf speaker with a Mark Audio Alpair 10. 3 with the sonic orientation of a monitor speaker which displays clean 48 - 50 Hz.
Thanks for the tips!
Kind regards Gerd
As a new member, I would like to introduce myself. My name is Gerd and I live on the southern, outer green belt of Cologne, near the Rhine.
I intend to build a reflex shelf speaker with a Mark Audio Alpair 10. 3 with the sonic orientation of a monitor speaker which displays clean 48 - 50 Hz.
Thanks for the tips!
Kind regards Gerd
Hallo Mike,
well I know this page and the "usual suppects" behind it. So it would be the choice between the "simple Reflex!" by Scott and the CGR MA 10.3 designed by Dave . So there should be some folks here with experience to make a comparison between them. I guess It is a matter of comparing the basic designs and then optimizing the housings within the scope of edge processing (Linkwitz, Harry F. Olson) and driver offset in the end.
So, Mike first of all thx and to Greg welcome in this show 🙂
Kind regards to Bismarck and Chamblee
Gerd
well I know this page and the "usual suppects" behind it. So it would be the choice between the "simple Reflex!" by Scott and the CGR MA 10.3 designed by Dave . So there should be some folks here with experience to make a comparison between them. I guess It is a matter of comparing the basic designs and then optimizing the housings within the scope of edge processing (Linkwitz, Harry F. Olson) and driver offset in the end.
So, Mike first of all thx and to Greg welcome in this show 🙂
Kind regards to Bismarck and Chamblee
Gerd
Gerd,
Welcome to diyAudio!
You mention "monitor"; if you are referring to a monitor sized bookshelf / stand-mount loudspeaker cabinet, then yes, there are designs using the MA Alpair 10.3 that would fit into that category. But if you are expecting a flat / neutral frequency response that is close to a studio monitor, then difficult to get with a FR unit, as there tends to be peaks and dips in the frequency range.
Welcome to diyAudio!
You mention "monitor"; if you are referring to a monitor sized bookshelf / stand-mount loudspeaker cabinet, then yes, there are designs using the MA Alpair 10.3 that would fit into that category. But if you are expecting a flat / neutral frequency response that is close to a studio monitor, then difficult to get with a FR unit, as there tends to be peaks and dips in the frequency range.
There are my miniOnkens and Scott has done some simplier reflex boxes.
Some of Scott’s: http://wodendesign.com/Free.html. There is also his misc box thread: https://www.diyaudio.com/community/...s-markaudio-fostex-tb-dayton-seas-etc.323051/
This is my largest (and most Chaotic set, 50+ pages),
https://www.diyaudio.com/community/threads/planet10-hifi-minionken-plan-set-subscriptions.186350/
dave
Some of Scott’s: http://wodendesign.com/Free.html. There is also his misc box thread: https://www.diyaudio.com/community/...s-markaudio-fostex-tb-dayton-seas-etc.323051/
This is my largest (and most Chaotic set, 50+ pages),
https://www.diyaudio.com/community/threads/planet10-hifi-minionken-plan-set-subscriptions.186350/
dave
And here's another one: https://www.diyaudio.com/community/...king-for-help-and-advice.396726/#post-7291151
Well-documented + the notch filter might be a welcome add-on for near-field listening - whichever design you'll chose.
If find 10.3 truly remarkable in Pensils, but only toed-in or else the treble is too hot. A notch will do the same trick and is prolly more 'accurate' for monitors.
Good luck,
Simon
Well-documented + the notch filter might be a welcome add-on for near-field listening - whichever design you'll chose.
If find 10.3 truly remarkable in Pensils, but only toed-in or else the treble is too hot. A notch will do the same trick and is prolly more 'accurate' for monitors.
Good luck,
Simon
Hallo zman01,
thx for your kind welcome. Yes I know it would ever be a FR driver, but there should be a chance for a "T/S max flat alignment” like Greg Monfort did in " Mark Audio Alpair 12 into large vented speaker cabinet" 2024-02-08 3:43 am #4 ! And then in the end min. 1.5" chamfers at the baffle edges and a moderate speaker offset can be able to minimize the peaks and the dips a bit.
Regards to Dhaka + stay save
Gerd
thx for your kind welcome. Yes I know it would ever be a FR driver, but there should be a chance for a "T/S max flat alignment” like Greg Monfort did in " Mark Audio Alpair 12 into large vented speaker cabinet" 2024-02-08 3:43 am #4 ! And then in the end min. 1.5" chamfers at the baffle edges and a moderate speaker offset can be able to minimize the peaks and the dips a bit.
Regards to Dhaka + stay save
Gerd
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Well, if that's what you want, there's nothing to stop you from doing it. GM posted the baseline maximally flat B4 formula in the post you link to, and you have the driver spec., so plug the numbers into equation for your Vb, Fb. You can then apply the proportions you prefer for the volume, & whatever offsets and chamfers / roundovers you believe will provide you with the results you want. Job-jibbed. 🙂
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Have a look there, @classAfreak - in your presentation subject :
https://www.diyaudio.com/community/...bookshelf-reflex-monitor.415387/#post-7742486
🙂😉
T
https://www.diyaudio.com/community/...bookshelf-reflex-monitor.415387/#post-7742486
🙂😉
T
Hallo Scott,
Thx for the reasoned answer! No, it is not yet decided what I will do – in any case I wouldn’t like to bring some additional components into the signal path. A realistically usable, perceptible lower frequency somewhere between 45 - 50 Hz should be feasible in a shelf speaker housing (max. 20 Ltr. = 0.71 CF) without overloading the driver. As a material only MPX comes into question, how the ventilation / reflex opening will be I then have to look and to reduce the losses due to the insulation as much as necessary but as little as possible.
How would you describe the difference between your design of the Simple Reflex for Alpair 10.3/ Alpair 10p and the design being made by Dave the Classic Golden Ratio Mar-Ken10.3/10p for Alpair10.3/Alpair10p in terms of frequency response, alignment, LF performance and overall charakteristics? ? Without taking into account the hearing space or the type of amplification powered by Class A, PP tube amplifier or SET amplifier.
Kind regards from the Rhine
Gerd
Thx for the reasoned answer! No, it is not yet decided what I will do – in any case I wouldn’t like to bring some additional components into the signal path. A realistically usable, perceptible lower frequency somewhere between 45 - 50 Hz should be feasible in a shelf speaker housing (max. 20 Ltr. = 0.71 CF) without overloading the driver. As a material only MPX comes into question, how the ventilation / reflex opening will be I then have to look and to reduce the losses due to the insulation as much as necessary but as little as possible.
How would you describe the difference between your design of the Simple Reflex for Alpair 10.3/ Alpair 10p and the design being made by Dave the Classic Golden Ratio Mar-Ken10.3/10p for Alpair10.3/Alpair10p in terms of frequency response, alignment, LF performance and overall charakteristics? ? Without taking into account the hearing space or the type of amplification powered by Class A, PP tube amplifier or SET amplifier.
Kind regards from the Rhine
Gerd
I expect Scott’s box goes lower but with a bit less controlled/finnessed at the bottom — comes directly from the typical (but well done) reflex, vrs one pushed towards aperiodic. Box shape won’t make a lot of difference. If you want to include that you have top move up to the trapezoids with their lower diffraction signature.
A10.3 goes into the smaller, A10p/a12p fit the larger one as well.
dave