I have for sale a never used pair of BMS 12n630 neodymium 12" subwoofer drivers. I opened one box just to look, the other box is unopened. Neither have been connected.
I purchased these about 3 months ago from Assistance Audio thinking I was going to build 2 subwoofers but changed my mind.
$285 ea. plus shipping
SPECIFICATIONS
Application Subwo
ofer
Nominal impedance:
Ohm
4 or 8
Power handling AES noise:
W
600
Sensitivity (1 W / 1 m):
dB
96
Frequency response:
Hz
25 - 300
Voice coil diameter:
mm
77 (3”)
Voice coil material:
Cu
Voice coil winding depth:
mm 26
Magnet gap depth:
mm
10
Basket:
Cast Aluminum
Effect. diaphragm diameter D
mm
252
Frequency response measured 100 W (28.3 V) at 1 m in a closed enclosure of 50 liter incl. 2nd and 3rd harmonic d-is tortion raised 20 dB.
Impedance – 8 Ohm driver
THIELE-SMALL PARAMETERS
Resonance frequency:
Fs
Hz
28.6
DC resistance:
Re
Ohm
6.00
Mechanical Q factor:
Qms
6.24
Electrical Q factor:
Qes
0.35
Total quality factor:
Qts
0.33
Equivalent volume:
Vas
l
85.5
Moving mass:
Mms
kg
0.127
Mechanical compl.:
Cms
mm / N
0.24
BL factor:
BL
Tesla m
19.8
Effective piston area:
Sd
m2
0.0498
Max. linear excursion:
Xmax
mm
±8
Voice coil inductance:
Le1k
mH
0.68
Le10k
mH
0.44
I purchased these about 3 months ago from Assistance Audio thinking I was going to build 2 subwoofers but changed my mind.
$285 ea. plus shipping
SPECIFICATIONS
Application Subwo
ofer
Nominal impedance:
Ohm
4 or 8
Power handling AES noise:
W
600
Sensitivity (1 W / 1 m):
dB
96
Frequency response:
Hz
25 - 300
Voice coil diameter:
mm
77 (3”)
Voice coil material:
Cu
Voice coil winding depth:
mm 26
Magnet gap depth:
mm
10
Basket:
Cast Aluminum
Effect. diaphragm diameter D
mm
252
Frequency response measured 100 W (28.3 V) at 1 m in a closed enclosure of 50 liter incl. 2nd and 3rd harmonic d-is tortion raised 20 dB.
Impedance – 8 Ohm driver
THIELE-SMALL PARAMETERS
Resonance frequency:
Fs
Hz
28.6
DC resistance:
Re
Ohm
6.00
Mechanical Q factor:
Qms
6.24
Electrical Q factor:
Qes
0.35
Total quality factor:
Qts
0.33
Equivalent volume:
Vas
l
85.5
Moving mass:
Mms
kg
0.127
Mechanical compl.:
Cms
mm / N
0.24
BL factor:
BL
Tesla m
19.8
Effective piston area:
Sd
m2
0.0498
Max. linear excursion:
Xmax
mm
±8
Voice coil inductance:
Le1k
mH
0.68
Le10k
mH
0.44
Attachments
Well if no one is interested I guess I'll have to build a couple subwoofers. Hot work this time of year in Arizona.🙂