DB Drive G7 12.1

2x1Ω
2x2Ω

Subwoofer

12″ / 305 mm
Nominal diameter
29 Hz
Resonance
0.37
Q factor
83 dB
Sensitivity
± 35 mm
Linear excursion
8000 W
Program Power
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
Sensitivity (1W, 1m, infinite baffle)
SPL1W
82.5
dB

Thiele & Small parameters

Resonance frequency (free air)
fS
29.4
Hz
Mechanical quality factor
QMS
2.11
Electrical quality factor
QES
0.44
Total quality factor
QTS
0.37

Large signal parameters

Maximum linear excursion
xmax
35.0
mm
Air volume displaced at xmax
VD
1646
cm³
Power handling
P
4000
W
Program power
Pmax
8000
W

Voice Coil

Nominal impedance
Z
2 x 1
Ω
DC resistance (in series)
RE
1.4
Ω
Inductance (1kHz, in series, estimated)
LE
0.8
mH
VC Diameter
76
mm

Magnet

Force factor (in series)
Bl
16.03
N/A
Motor constant
Bl/√RE
13.5
N/√W
Material
Ferrite

Diaphragm

Effective diameter
245
mm
Effective area
SD
470
cm²
Moving mass
MMS
439.8
g
Moving mass (without air load)
MMD
432
g

Suspensions

Stiffness
KMS
14.93
N/mm
Compliance
CMS
67
µm/N
Equivalent volume to the compliance
VAS
21
L
Mechanical resistance
RMS
38.56
N·s/m
Surround material
Foam

Dimensions

Nominal diameter
12
305
mm
Overall diameter
328
mm
Baffle cutout diameter
283
mm
Mounting depth
244
mm
Volume occupied by the driver (estimated)
2.9
L
Frame material
Aluminium

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