15W8530K00 T/S parameters

[kamppi]

I have noticed that different sources are giving different T/S parameters values for for this driver. Which ones should I believe? What kind of values you have measured? I do not have proper signal generator, so I can not measure these by myself

VAS 28 liters; 16 liters; 11.8 liters; 28 liters

Fs 30 Hz; 36 Hz; 44.26 Hz; 30 Hz

Qts 0.24; 0.4; 0.54; 0.35;

Qes 0.29; 0.42; 0.59; 0.38;

Qms 4.9; 7.61; 5.8; 4.9;

There is specially big difference with Qts and Qes. Currently I have a 25 l vented box. If I use Tymphany's values, size of box should be about 10 liters, since Qts is so much lower. NorthCreek is proposing 16 - 20 liters vented box.

According to Tymphany EBP = Fs/Qes is 103 which is over 100 and this means that I should consider a BR box. When I use other values EBP is about 75, and this means that I should consider a closed box.

[Michail Bugaria]

>I do not have proper signal generator, so I can not measure >these by myself

Proper Signal Generator = PC + Sound Card + Cheap Soft (like NCH Tone Generator)

[Mingo]

Hobby Hifi 4/2003 measured these:
Fs 29 Hz - Qms 4.8 - Qes 0.33 - Qts 0.31 - Vas 34 l .
Box recommended: 21 l tuned to 30 Hz BRport 40 mm diameter 170 mm length.
Look for A4 Monitor (Dutch) and Troels Gravesen's W1500/97.
As far as I know most people prefer about 10 l volume.

[kamppi]

Thanks Mingo,

I have also noticed that most of the people have used ~10 l cabinets for this driver.

I did WinISD simulation for the cabinet recommended by Hobby Hifi. Result was quite good. I think that I need to consider to put about 4 - 5 liters of sand to my 25 l cabinets.