Focal AUDITOR RSB 300

Subwoofer

12″ / 323 mm
Nominal diameter
25 Hz
Resonance
0.47
Q factor
87 dB
Sensitivity
600 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
86.8
dB
Frequency response
30 - 500
Hz

Thiele & Small parameters

Resonance frequency (free air)
fS
25.0
Hz
Mechanical quality factor
QMS
4.50
Electrical quality factor
QES
0.52
Total quality factor
QTS
0.47

Large signal parameters

Power handling
P
300
W
Program power
Pmax
600
W

Voice Coil

Nominal impedance
Z
2 x 4
Ω
DC resistance (in series)
RE
6.4
Ω
Inductance (1kHz, in series, estimated)
LE
1.73
mH
VC Diameter
50
mm

Magnet

Force factor (in series)
Bl
16.6
N/A
Motor constant
Bl/√RE
6.56
N/√W
Diameter
144
mm

Diaphragm

Effective diameter
245
mm
Effective area
SD
471
cm²
Moving mass
MMS
130
g
Moving mass (without air load)
MMD
122.2
g
Material
Polypropylene

Suspensions

Stiffness
KMS
3.33
N/mm
Compliance
CMS
300
µm/N
Equivalent volume to the compliance
VAS
93
L
Mechanical resistance
RMS
4.54
N·s/m
Surround material
Butyl

Dimensions

Nominal diameter
12
323
mm
Overall diameter
323
mm
Baffle cutout diameter
282
mm
Mounting depth
142
mm
Volume occupied by the driver (estimated)
1.8
L
Net weight
4.3
kg
Focal RSB 300 Dimensions

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