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WTB: 12" or 15" Subwoofer

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Brian Steele

Brian Steele

Member
Joined 2007
diysubwoofers.org
Apex Jr said:
Just got in and sent to my webguy to post on the website:


12" Subwoofer
THRUSTER Series II Model THW 1260
4 Ohms Recommended Box Size
200 Watt RMS
2" Voice Coil Box Size Ported 2.2 Cu ft
50 Oz Magnet 2 Ports 2 3/4"Dia X 2 1/4" Long
Fs 30Hz
Freq Res 25Hz-2K Hz Box Size Sealed 0.7 Cu Ft
SPL 90Db
QTS .21
VAS 395L PRICE 39.95 each


Steve @ Apex Jr.
steve.apexjr@prodigy.net
Click to expand...


Are those measured specs? I ran them through my spreadsheet and it came out with some strange results, like SPL neared to 98dB/1W/1M rather than 90dB/1W/1M.

See notes below (I estimated Qes, Qms and a few other things):

Given:
=====
Driver = Thruster THW 1260
Vas = 395.0 liters
Qes(d) = 0.215
Qms = 9.000
Re = 2.800 Ohms
Fs = 30.0 Hz
Le = 1.20 mH
Dia = 25.9 cm
Xmax = 10.0 mm
Rg = 0.000 Ohms


Calculated:
=========
Sd = 0.0527 m^2
Vd = 0.0005 m^3
Cms = 1.0021 mm/N
Mmd = 28.1 g
BL = 8.3 Tm
Rms = 0.6 Kg/s
Qes = 0.215
Qts = 0.210
Eff. = 98.8 dB/1W/1M
Sens. = 103.4 dB/1W/1M
 
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