I have a 12 inch dvc Blaupunkt subwoofer which I'm guessing is intended for car audio use. Two questions: how suitable would it be for home use? and can anyone give me the T/S numbers? Failing that, can anyone advise re box size and tuning? (OK, thats's three questions) 
The model number is SBW 1208
The model number is SBW 1208
Fine to use at home; go sealed and put it in a corner; the room gain will compensate the roll off.
12" 3000W DVC SUBWOOFER - Blaupunkt Car Audio
Frequency Response(+/-3dB ):30HZ- 1000HZ Power : 300W RMS + 300 RMS Recommended Sealed : 1.0 ft3 Peak Power : 3000W Sensitivity : 88 dB/w/m Impedance : 4Ohm + 4 Ohm 35 Oz Strontium Magnet Voice Coil : 2"
12" 3000W DVC SUBWOOFER - Blaupunkt Car Audio
Frequency Response(+/-3dB ):30HZ- 1000HZ Power : 300W RMS + 300 RMS Recommended Sealed : 1.0 ft3 Peak Power : 3000W Sensitivity : 88 dB/w/m Impedance : 4Ohm + 4 Ohm 35 Oz Strontium Magnet Voice Coil : 2"
I have a 12 inch dvc Blaupunkt subwoofer which I'm guessing is intended for car audio use. Two questions: how suitable would it be for home use? and can anyone give me the T/S numbers? Failing that, can anyone advise re box size and tuning? (OK, thats's three questions)
The model number is SBW 1208
I have one intended for car audio use but not the reference. Here are measurements I made in september 2007 with a Woofertester apparatus. I still have it, it's in a box, I never use it. I can make new measurements with Clio Pocket if you wish
310 Blaupunkt
*************
Vas Delta Mass (SnapTS) completed: Mon Sep 10 13:45:36 2007
Drive level 100.00% [3181.82 uA]
;------------------------------------------------------------------
Re = 3.5788 ohms
Fs = 37.2891 Hz
Zmax = 24.7236 ohms
Qes = 1.3733
Qms = 8.1137
Qts = 1.1745
Le = 1.1692 mH (at 1 kHz)
Diam = 250.0000 mm ( 9.8425 in )
Sd =49087.3866 mm^2( 76.0856 in^2)
Vas = 56.5249 L ( 1.9962 ft^3)
BL = 8.2072 N/A
Mms = 110.3165 g
Cms = 165.1336 uM/N
Kms = 6055.7017 N/M
Rms = 3.1855 R mechanical
Efficiency = 0.2005 %
Sensitivity= 85.0399 dB @1W/1m
Sensitivity= 88.5334 dB @2.83Vrms/1m
Krm = 5.884E-03 ohms Freq dependent resistance
Erm = 699.709E-03 Rem=Krm*(2*pi*f)^Erm
Kxm = 27.616E-03 Henries Freq dependent reactance
Exm = 604.664E-03 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 33.794 Hz
Ftest/Fms = 0.9063
Test Mass used = 24.0000 g (Equal to 4.8 nickels)
Test Mass (Ft=Fms*0.90) = 25.877 g (Add 1.877g for Ft=33.560)
Test Mass (Ft=Fms*0.75) = 85.802 g (Add 61.802g for Ft=27.967)
********************************************************************************
BLAUPUNKT 31 cm double-bobine
*****************************
............. A .............. B................ A+B............ A//B
Re........... 3.5747 ohms..... 3.5576 ohms...... 7.1803 ohms.... 1.7875 ohms
Fs........... 37.0912 Hz...... 36.9948 Hz....... 36.8907 Hz..... 36.8772 Hz
Zmax......... 25.3247 ohms.... 24.4423 ohms..... 93.2908 ohms... 23.4863 ohms
Le(1 kHz).... 1.1692 mH....... 1.1692 mH........ 1.1692 mH...... 1.1692 mH
Qes.......... 1.3888.......... 1.4252........... 0.7144......... 0.7090
Qms.......... 8.4501.......... 8.3664........... 8.5671......... 8.6064
Qts.......... 1.1928.......... 1.2177........... 0.6594......... 0.6550
Diam......... 25.0000 cm...... 25.0000 cm...... 250.0000 cm.....250.0000 cm
Sd........... 490.8739 cm².... 490.8739 cm²..... 490.8739 cm²....490.8739 cm²
Vas.......... 61.4579 L....... 58.5959 L........ 59.4782 L...... 58.5975 L
Mms.......... 102.5472 g...... 108.1172 g....... 107.1156 g..... 108.8055 g
Cms.......... 179.5451 uM/N... 171.1840 uM/N.... 173.7613 uM/N.. 171.1886 uM/N
Kms.......... 5569.6313 N/m... 5841.6680 N/m.... 5755.0200 N/m.. 5841.5117 N/M
Rms.......... 2.8282 Rmec..... 3.0038 Rmec...... 2.8981 Rmec.... 2.9293 Rmec
BL........... 7.8430 N/A...... 7.9205 N/A....... 15.7975 N/A.... 7.9726 N/A
no........... 0.2245 %........ 0.2070 %......... 0.4156 %....... 0.4121 %
sensibilité.. 89.0291 dB...... 88.6968 dB....... 88.6746 dB..... 94.6767 dB SPL
(2.83 V à 1 m)
Bobine A
¨¨¨¨¨¨¨¨
Vas Delta Mass (SnapTS) completed: Mon Sep 10 13:45:36 2007
Drive level 100.00% [3181.82 uA]
;------------------------------------------------------------------
Re = 3.5747 ohms
Fs = 37.0912 Hz
Zmax = 25.3247 ohms
Qes = 1.3888
Qms = 8.4501
Qts = 1.1928
Le = 1.1692 mH (at 1 kHz)
Diam = 250.0000 mm ( 9.8425 in )
Sd =49087.3866 mm^2( 76.0856 in^2)
Vas = 61.4579 L ( 2.1704 ft^3)
BL = 7.8430 N/A
Mms = 102.5472 g
Cms = 179.5451 uM/N
Kms = 5569.6313 N/M
Rms = 2.8282 R mechanical
Efficiency = 0.2245 %
Sensitivity= 89.0291 dB @2.83Vrms/1m
Krm = 156.691E-06 ohms Freq dependent resistance
Erm = 1.008E+00 Rem=Krm*(2*pi*f)^Erm
Kxm = 144.500E-06 Henries Freq dependent reactance
Exm = 1.053E+00 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 31.911 Hz
Ftest/Fms = 0.8603
Test Mass used = 36.0000 g (Equal to 7.2 nickels)
Test Mass (Ft=Fms*0.90) = 24.054 g (Add -11.946g for Ft=33.382)
Test Mass (Ft=Fms*0.75) = 79.759 g (Add 43.759g for Ft=27.818)
bobine B
¨¨¨¨¨¨¨¨
Vas Delta Mass (SnapTS) completed: Mon Sep 10 13:45:36 2007
Drive level 100.00% [3181.82 uA]
;------------------------------------------------------------------
Re = 3.5576 ohms
Fs = 36.9948 Hz
Zmax = 24.4423 ohms
Qes = 1.4252
Qms = 8.3664
Qts = 1.2177
Le = 1.1692 mH (at 1 kHz)
Diam = 250.0000 mm ( 9.8425 in )
Sd =49087.3866 mm^2( 76.0856 in^2)
Vas = 58.5959 L ( 2.0693 ft^3)
BL = 7.9205 N/A
Mms = 108.1172 g
Cms = 171.1840 uM/N
Kms = 5841.6680 N/M
Rms = 3.0038 R mechanical
Efficiency = 0.2070 %
Sensitivity= 88.6968 dB @2.83Vrms/1m
Krm = 158.595E-06 ohms Freq dependent resistance
Erm = 1.002E+00 Rem=Krm*(2*pi*f)^Erm
Kxm = 144.968E-06 Henries Freq dependent reactance
Exm = 1.051E+00 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 32.043 Hz
Ftest/Fms = 0.8661
Test Mass used = 36.0000 g (Equal to 7.2 nickels)
Test Mass (Ft=Fms*0.90) = 25.361 g (Add -10.639g for Ft=33.295)
Test Mass (Ft=Fms*0.75) = 84.091 g (Add 48.091g for Ft=27.746)
bobines A et B en série
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
Vas Delta Mass (SnapTS) completed: Mon Sep 10 13:45:36 2007
Drive level 100.00% [3181.82 uA]
;------------------------------------------------------------------
Re = 7.1803 ohms
Fs = 36.8907 Hz
Zmax = 93.2908 ohms
Qes = 0.7144
Qms = 8.5671
Qts = 0.6594
Le = 1.1692 mH (at 1 kHz)
Diam = 250.0000 mm ( 9.8425 in )
Sd =49087.3866 mm^2( 76.0856 in^2)
Vas = 59.4782 L ( 2.1005 ft^3)
BL = 15.7975 N/A
Mms = 107.1156 g
Cms = 173.7613 uM/N
Kms = 5755.0200 N/M
Rms = 2.8981 R mechanical
Efficiency = 0.4156 %
Sensitivity= 88.6746 dB @2.83Vrms/1m
Krm = 121.774E-06 ohms Freq dependent resistance
Erm = 1.146E+00 Rem=Krm*(2*pi*f)^Erm
Kxm = 112.584E-06 Henries Freq dependent reactance
Exm = 1.188E+00 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 31.915 Hz
Ftest/Fms = 0.8651
Test Mass used = 36.0000 g (Equal to 7.2 nickels)
Test Mass (Ft=Fms*0.90) = 25.126 g (Add -10.874g for Ft=33.202)
Test Mass (Ft=Fms*0.75) = 83.312 g (Add 47.312g for Ft=27.668)
bobine A et B en parallèle
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
Vas Delta Mass (SnapTS) completed: Mon Sep 10 13:45:36 2007
Drive level 100.00% [3181.82 uA]
;------------------------------------------------------------------
Re = 1.7875 ohms
Fs = 36.8772 Hz
Zmax = 23.4863 ohms
Qes = 0.7090
Qms = 8.6064
Qts = 0.6550
Le = 1.1692 mH (at 1 kHz)
Diam = 250.0000 mm ( 9.8425 in )
Sd =49087.3866 mm^2( 76.0856 in^2)
Vas = 58.5975 L ( 2.0694 ft^3)
BL = 7.9726 N/A
Mms = 108.8055 g
Cms = 171.1886 uM/N
Kms = 5841.5117 N/M
Rms = 2.9293 R mechanical
Efficiency = 0.4121 %
Sensitivity= 94.6767 dB @2.83Vrms/1m
Krm = 157.712E-06 ohms Freq dependent resistance
Erm = 1.005E+00 Rem=Krm*(2*pi*f)^Erm
Kxm = 145.709E-06 Henries Freq dependent reactance
Exm = 1.048E+00 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 31.966 Hz
Ftest/Fms = 0.8668
Test Mass used = 36.0000 g (Equal to 7.2 nickels)
Test Mass (Ft=Fms*0.90) = 25.522 g (Add -10.478g for Ft=33.189)
Test Mass (Ft=Fms*0.75) = 84.626 g (Add 48.626g for Ft=27.658)
Blaupunkt driver, one voice coil, 2pt RmXm
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
Vas Delta Mass (SnapTS) completed: Mon Sep 10 13:45:36 2007
Drive level 100.00% [3181.82 uA]
;------------------------------------------------------------------
Re = 3.5788 ohms
Fs = 37.2891 Hz
Zmax = 24.7236 ohms
Qes = 1.3733
Qms = 8.1137
Qts = 1.1745
Le = 1.1692 mH (at 1 kHz)
Diam = 250.0000 mm ( 9.8425 in )
Sd =49087.3866 mm^2( 76.0856 in^2)
Vas = 56.5249 L ( 1.9962 ft^3)
BL = 8.2072 N/A
Mms = 110.3165 g
Cms = 165.1336 uM/N
Kms = 6055.7017 N/M
Rms = 3.1855 R mechanical
Efficiency = 0.2005 %
Sensitivity= 85.0399 dB @1W/1m
Sensitivity= 88.5334 dB @2.83Vrms/1m
Krm = 5.884E-03 ohms Freq dependent resistance
Erm = 699.709E-03 Rem=Krm*(2*pi*f)^Erm
Kxm = 27.616E-03 Henries Freq dependent reactance
Exm = 604.664E-03 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 33.794 Hz
Ftest/Fms = 0.9063
Test Mass used = 24.0000 g (Equal to 4.8 nickels)
Test Mass (Ft=Fms*0.90) = 25.877 g (Add 1.877g for Ft=33.560)
Test Mass (Ft=Fms*0.75) = 85.802 g (Add 61.802g for Ft=27.967)
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