B&C Speaker 8FMB51

Name: 8FMB51
Brand: B&C Speaker

8Ω

16Ω

Mid Bass

8″ / 200 mm

Nominal diameter

67 Hz

Resonance

0.28

Q factor

94 dB

Sensitivity

± 5.5 mm

Linear excursion

500 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 94.3; dB
Frequency response: 67 - 4500; Hz
Resonance frequency (free air)
f_S: 67.0; Hz
Mechanical quality factor
Q_MS: 3.07
Electrical quality factor
Q_ES: 0.31
Total quality factor
Q_TS: 0.28
Maximum linear excursion
x_max: 5.5; mm
Air volume displaced at x_max
V_D: 125; cm³
Power handling
P: 250; W
Program power
P_max: 500; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 4.7; Ω
Inductance (1kHz)
L_E: 0.48; mH
VC Diameter: 51; mm
Winding height
H_VC: 15; mm
Winding material: Aluminium
Former material: Glass Fibre
Flux density
B: 1.19; T
Force factor
Bl: 11.3; N/A
Motor constant
Bl/√R_E: 5.21; N/√W
Air gap height
H_AG: 8; mm
Material: Ferrite Ring
Effective diameter: 170; mm
Effective area
S_D: 227; cm²
Moving mass
M_MS: 20.2; g
Moving mass (without air load)
M_MD: 17.6; g
Material: Waterproof
Stiffness
K_MS: 3.55; N/mm
Compliance
C_MS: 282; µm/N
Equivalent volume to the compliance
V_AS: 20.7; L
Mechanical resistance
R_MS: 2.77; N·s/m
Nominal diameter: 8; ″
: 200; mm
Overall diameter: 225; mm
Baffle cutout diameter: 187; mm
Overall depth: 92; mm
Flange thickness: 9; mm
Mounting depth: 83; mm
Volume occupied by the driver: 1.2; L
Net weight: 3.4; kg

Datasheet

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B&C Speaker 8FMB51

Mid Bass

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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