BMS 8C250

Name: 8C250
Brand: BMS

Coaxial

8″ / 205 mm

Nominal diameter

79 Hz

Resonance

0.52

Q factor

93 dB

Sensitivity

± 4.25 mm

Linear excursion

400 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 92.5; dB
Frequency response: 70 - 3000; Hz
Resonance frequency (free air)
f_S: 79.1; Hz
Mechanical quality factor
Q_MS: 4.85
Electrical quality factor
Q_ES: 0.61
Total quality factor
Q_TS: 0.52
Maximum linear excursion
x_max: 4.25; mm
Air volume displaced at x_max
V_D: 85; cm³
Power handling
P: 200; W
Program power
P_max: 400; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 5.4; Ω
Inductance (1kHz, estimated)
L_E: 0.43; mH
VC Diameter: 51; mm
Winding height
H_VC: 15; mm
Winding material: Copper
Former material: Kapton
Flux density
B: 1.8; T
Force factor
Bl: 9.95; N/A
Motor constant
Bl/√R_E: 4.28; N/√W
Air gap height
H_AG: 6.5; mm
Material: Ceramic
Effective diameter: 160; mm
Effective area
S_D: 201; cm²
Moving mass
M_MS: 18.3; g
Moving mass (without air load)
M_MD: 16.2; g
Material: Polyester
Stiffness
K_MS: 5.56; N/mm
Compliance
C_MS: 180; µm/N
Equivalent volume to the compliance
V_AS: 10.2; L
Mechanical resistance
R_MS: 1.88; N·s/m
Nominal diameter: 8; ″
: 205; mm
Overall diameter: 205; mm
Baffle cutout diameter: 182; mm
Overall depth: 111; mm
Volume occupied by the driver (estimated): 1.1; L
Net weight: 3.0; kg
Frame material: Cast Aluminum

Datasheet

Export this driver to a simulation software:

BMS 8C250

Coaxial

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

Export this driver to a simulation software:

Similar speaker drivers to BMS 8C250