T & M loudspeakers is new. We want to concentrate on making high quality cabinets from hardwoods. We use Oakwood and we also make some cabinets from MDF and marine ply, but our first priority is to use solid woods. T & M is based in Hong Kong so we work closely with Mark Audio. We use all Mark Audio drivers because the quality and performance is excellent. Twin Audio is our amp business. We match our amplifiers with Mark Audio drivers and also use some of the designs from Mark Audio plans.
We will offer both finished speakers and cabinets as kits. We can build to order. Send us your plan or email your details. We can help you with the build. We supply speakers to all major locations.
Regards,
Tony Wong.
We will offer both finished speakers and cabinets as kits. We can build to order. Send us your plan or email your details. We can help you with the build. We supply speakers to all major locations.
Regards,
Tony Wong.

Oakwood cabinets which refer to Mark Audio Till70 CHR-70 Bass Reflex bookshelf design.
Thickness: 18 mm
Box diagram for CHR-70:
http://www.markaudio.com/plan/chr-70/till70
http://www.markaudio.com/sites/all/files/pdf/plan-chr70-till70.pdf
Thickness: 18 mm




Box diagram for CHR-70:
http://www.markaudio.com/plan/chr-70/till70
http://www.markaudio.com/sites/all/files/pdf/plan-chr70-till70.pdf
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Speaker cabinets in MDF with black piano finishing and veneer in gloss finishing are also available now.
Oakwood and MDF boxes:

Oakwood and MDF boxes:

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This is a bass reflex bookshelf cabinet designed by Mark Fenlon.
Mark recommended to build it in 20 mm oakwood. The dimension of cabinet is 200W x 245D x 310H mm and the port size is 36 dia. x 108 mm long for Alpair 7. There is a good bass performance on Alpair 7 for this cabinet design.
This cabinet can also be applied to CHR-70.
Mark recommended to build it in 20 mm oakwood. The dimension of cabinet is 200W x 245D x 310H mm and the port size is 36 dia. x 108 mm long for Alpair 7. There is a good bass performance on Alpair 7 for this cabinet design.


This cabinet can also be applied to CHR-70.
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CHR-70 oakwood cabinets for Mark Audio Till70 Bass Reflex bookshelf design:
Thickness: 18 mm
Dimension: 160W x 190D x 290H mm
Selling Price: USD80/pair
*Prices are for cabinets only.
Thickness: 18 mm
Dimension: 160W x 190D x 290H mm
Selling Price: USD80/pair
*Prices are for cabinets only.


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This is a good example, one of my customer in Hong Kong tried to add Alpha Core Air-Core Inductor to CHR-70. From his experience, this AWG12, 0.27mH copper foil inductor can give great improvement to the performance of CHR-70 full range driver. Wider sound stage, better high range, sweeter mid range and deeper bass.
Attachments
This is a baffle step correction circuit. He also has resistors in parallel with the inductor. Could you ask him what total value of resistance he is using?
This is a baffle step correction circuit. He also has resistors in parallel with the inductor. Could you ask him what total value of resistance he is using?
Hello,
Can you provide more information about baffle step correction circuit?
Are the resistors are wired in parallel or series with inductor?
OK.
Thanks.
Resistors are in parallel. There are a couple of calculators below which you can play with.
mh-audio.nl - Home
Home of the Edge
Also martin King's site has some links here...
General Speaker Related Articles
mh-audio.nl - Home
Home of the Edge
Also martin King's site has some links here...
General Speaker Related Articles
Hello,
Can you provide more information about baffle step correction circuit?
Are the resistors are wired in parallel or series with inductor?
OK.
Thanks.
Resistors are in parallel. There are a couple of calculators below which you can play with.
mh-audio.nl - Home
Home of the Edge
Also martin King's site has some links here...
General Speaker Related Articles
Thank you very much for your information.
In mh-audio.nl calculation, what is the amount of attenuation required?
Is it necessary to add Zobel Resistor and capacitor in the circuit?
Generally start with modest attenuation, maybe 4dB. You can try first without the zobel parts.
OK and thanks.
How about the power(W) for Rbsc resistor I should select after calculation?
OK and thanks.
How about the power(W) for Rbsc resistor I should select after calculation?
10 watts should be OK with this speaker.
10 watts should be OK with this speaker.
How about 15W resistors?
Is this kind of air core inductor good for full range drivers?
Thanks.
Attachments
Anthing 10W and up is fine, so 15W is good. I'd choose inductors with no more than 0.2 Ohm DC resistance.
Anthing 10W and up is fine, so 15W is good. I'd choose inductors with no more than 0.2 Ohm DC resistance.
Thanks.
Tony, for the Baffle Step Correction, you can actually make different versions. For Desktop/Near Field/Close to wall placement, 3dB is usually adequate, but for free standing, say 1m from the rear wall, 6dB would be better.
BTW, where can I buy your speakers in Hong Kong? Are there any retailers? They look pretty awesome! How much's for a pair of CHR70 with piano black cabinet?
BTW, where can I buy your speakers in Hong Kong? Are there any retailers? They look pretty awesome! How much's for a pair of CHR70 with piano black cabinet?
Hi Boris,
Thanks for your advice. I will try it out later.
You can buy the speakers at Rm. E, Flat C3, 7/F., Block C, Tuen Mun Industrial Centre, 2 San Ping Circuit, Tuen Mun, H.K.
The price of Till70 cabinets in piano black for CHR-70 is USD120/pair.
Thanks,
Tony.
Thanks for your advice. I will try it out later.
You can buy the speakers at Rm. E, Flat C3, 7/F., Block C, Tuen Mun Industrial Centre, 2 San Ping Circuit, Tuen Mun, H.K.
The price of Till70 cabinets in piano black for CHR-70 is USD120/pair.
Thanks,
Tony.
Tony, for the Baffle Step Correction, you can actually make different versions. For Desktop/Near Field/Close to wall placement, 3dB is usually adequate, but for free standing, say 1m from the rear wall, 6dB would be better.
BTW, where can I buy your speakers in Hong Kong? Are there any retailers? They look pretty awesome! How much's for a pair of CHR70 with piano black cabinet?
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