VOLT BM228.8

Name: BM228.8
Brand: VOLT

Woofer

8″ / 220 mm

Nominal diameter

35 Hz

Resonance

0.35

Q factor

88 dB

Sensitivity

± 4 mm

Linear excursion

300 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 87.6; dB
Frequency response: 30 - 3000; Hz
Resonance frequency (free air)
f_S: 35.0; Hz
Mechanical quality factor
Q_MS: 5.80
Electrical quality factor
Q_ES: 0.38
Total quality factor
Q_TS: 0.35
Maximum linear excursion
x_max: 4.0; mm
Maximum excursion before damage
x_lim: 12.5; mm
Air volume displaced at x_max
V_D: 86; cm³
Power handling
P: 150; W
Program power
P_max: 300; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 5.8; Ω
Inductance (1kHz)
L_E: 1.26; mH
VC Diameter: 38; mm
Winding material: Copper
Force factor
Bl: 11.7; N/A
Motor constant
Bl/√R_E: 4.86; N/√W
Weight: 3.6; kg
Effective diameter: 165; mm
Effective area
S_D: 214; cm²
Moving mass
M_MS: 40; g
Moving mass (without air load)
M_MD: 37.5; g
Material: Coated Black HIPS
Stiffness
K_MS: 2.0; N/mm
Compliance
C_MS: 500; µm/N
Equivalent volume to the compliance
V_AS: 32; L
Mechanical resistance
R_MS: 1.52; N·s/m
Surround material: Rubber
Nominal diameter: 8; ″
: 220; mm
Overall diameter: 235; mm
Baffle cutout diameter: 200; mm
Overall depth: 106; mm
Flange thickness: 9; mm
Mounting depth: 97; mm
Volume occupied by the driver: 0.8; L
Net weight: 4.1; kg
Frame material: Diecast Aluminium

Datasheet

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VOLT BM228.8

Woofer

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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