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P.audio BM-12W drivers

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Toddy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Toddy Quote  Post ReplyReply Direct Link To This Post Topic: P.audio BM-12W drivers
    Posted: 07 July 2005 at 5:42am
Can I use P.audio BM-12W drivers in the MT122? The reason why I`m asking is because I have them in home made boxes, and I`m not happy with the sound. I use the P.audio PA-D72 with the PH-4528 horn, and two BM-12W pr. side.

Toddy
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whitehousejamie View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote whitehousejamie Quote  Post ReplyReply Direct Link To This Post Posted: 07 July 2005 at 5:46am
Unfortunately, they will not work very well in the MT122. The Qts of the driver is too high, and you need a driver with simular parameters to the SN-12B for use in a mid horn such as the MT122.
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Toddy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Toddy Quote  Post ReplyReply Direct Link To This Post Posted: 07 July 2005 at 6:09am
will the fq-response be wrong?
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Toddy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Toddy Quote  Post ReplyReply Direct Link To This Post Posted: 07 July 2005 at 6:25am
can someone here design a horn for mid to the BM-12W?
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Jimbo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jimbo Quote  Post ReplyReply Direct Link To This Post Posted: 07 July 2005 at 8:36am

Got TS?

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Toddy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Toddy Quote  Post ReplyReply Direct Link To This Post Posted: 07 July 2005 at 8:42am
Resonance Frequency Fs     38.0 Hz     
DC Resistance Re     6.8 Ohm     
Mechanical Q Factor Qms     2.533   &nbs p; 
Electrical Q Factor Qes     0.386   &nbs p; 
Total Q Factor Qts     0.335   &nbs p; 
BL Factor BL     17.33 T x m     
Effective Moving Mass Mms     71.44 gr     
Equivalent Cas air Load Vas     90.27 liters     
Effective piston area Sd     0.0510 m2     
Voice-coil inductance @ 1 KHz Le1k     0.92 mH     
Half-space efficiency Eff     1.24 %     
Airgap Height Haq     8.0 mm     
Voice coil Height Hvc     17.0 mm     
Voice coil Over-Hung Xmax     4.5 mm

Edited by Toddy
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DJ Tosco View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DJ Tosco Quote  Post ReplyReply Direct Link To This Post Posted: 07 July 2005 at 11:15am
This isn't a good horn driver. This results in a narrow bandwidth and poor mid high extension when horn-loaded. The Fs is too low, Qes too high, and Bl^2/Re isn't very high.
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