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-   -   Philips AD12100/M8 solution (http://www.diyaudio.com/forums/full-range/233502-philips-ad12100-m8-solution.html)

Xerxes75 5th April 2013 04:27 PM

Philips AD12100/M8 solution
 
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I have just bought a pair of Philips AD12100/M8 en i already love them. For now they are sitting nicely in a OB. But in my search on internet i found a cabinet for this driver... the "monitor 12".

Does anybody has a plan for this cabinet or another good idea for the OB solution for example a combination with a AD12100/W8....in that case a solution for the filter would be nice.

oh yes a picture of this "monitor 12" cabinet.

IG81 5th April 2013 07:02 PM

I sort of passively collect all Philips speaker literature I find online, have yet to see anything about the Monitor 12. I only know of the Monitor-8 using the 9710, sort of an Onken enclosure. I'll keep my eyes open for a plan, good luck!

PHILIPS スピーカーシステムMONITOR-12の仕様 フィリップス

IG

Xerxes75 6th April 2013 07:55 AM

Ah this advert has dimensions in it! Thanks. I can sort of work it out from there.
I have the 9710/m8 in a voight pipe and tweeter added, this sounds wondfull and is the kick start for more Philips drivers/cabinets.

IG81 6th April 2013 12:37 PM

Quote:

Originally Posted by Xerxes75 (Post 3443109)
Ah this advert has dimensions in it! Thanks. I can sort of work it out from there.
I have the 9710/m8 in a voight pipe and tweeter added, this sounds wondfull and is the kick start for more Philips drivers/cabinets.

I assume these are the external dimensions, subtracting 38mm on each measure should get you close IMO. Looks like ~80L internal gross volume.

If the large duct vent is simply what it seems to be, I think it might tune fairly high. Might be good for sensitivity, but bass response will possibly suffer. This can be experimented upon in any case.

IG

Xerxes75 6th April 2013 01:10 PM

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well the opening seem to just a opening (see pic.)

If i just build it this large and the bass is some what lacking? can i just plug the hole than? (the math thing on building is not my thing)

IG81 6th April 2013 01:35 PM

Thanks for this internal shot! If you can find out or approximate the duct's dimensions, it will then be easy to calculate or simulate what tuning frequency will result and if it is to your taste. If you want a lower tuning, reducing the vent cross-section area will do this. Still, I'm inclined to think that Philips knew what they were doing. I once built the recommended reflex for the 9710 and it was alright, but I'm pretty sure a big TQWT or Voigt is better.

IG

Xerxes75 6th April 2013 02:58 PM

i have made a drawing of the cabinet with dimensions and found all the specs for the driver. Problem is that the drawing is in autocad but i can't convert it to PDF or something.

Xerxes75 6th April 2013 08:46 PM

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well after a bit of a struggle i managed to make a PDF of my drawing...
as you said it is 83,9 liters

Could you look at it and maybe tell me how this box is tuned?

That would be great!

the number that go with the driver (in french)

Mod鑞e : AD12100 M8
Type : double cne, suspension petits plis, aimant ferrite
Puissance nominale : 25 W
Puissance maxi : 40 W
Bande passante : 40 15 kHz
Fr駲uence de r駸onance : 36 Hz
QMS : 2,763
QES : 0,558
QTS : 0,464
VAS : 193,3 l
Mms : 31,6 g
Rendement : 93 dB
Imp馘ance : 8 Ohms
Diam鑼re bobine : 50 mm
Diam鑼re ferrite : 133 mm
Diam鑼re : 314,5 mm
Profondeur du HP : 151,4 mm
Ouverture Baffle : 278 mm
Volume conseill : 80 L
Entre axe diagonal : 294 m
Poids : 3,2 kg l'unit

IG81 6th April 2013 11:00 PM

Looks like the vent geometry will tune a ~83L box around 65Hz. Simulating with the above T/S parameters does not look good. Maybe the parameters are not right somewhere in that list? I know Philips built-in small midbass humps at times, but this is outright a peak, a large peak. A tuning aroud 30-35Hz produces a transfer function more similar to what I'm used to with Philips designs.

IG

bjorno 7th April 2013 01:33 AM

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Hi,

FYI: :2c: :

b:)


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