B&C Speaker 21SW115

Name: 21SW115
Brand: B&C Speaker

4Ω

8Ω

Subwoofer

21″ / 530 mm

Nominal diameter

33 Hz

Resonance

0.36

Q factor

95 dB

Sensitivity

± 14 mm

Linear excursion

3400 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 95.1; dB
Frequency response: 33 - 1000; Hz
Resonance frequency (free air)
f_S: 33.0; Hz
Mechanical quality factor
Q_MS: 7.70
Electrical quality factor
Q_ES: 0.37
Total quality factor
Q_TS: 0.36
Maximum linear excursion
x_max: 14.0; mm
Air volume displaced at x_max
V_D: 2352; cm³
Power handling
P: 1700; W
Program power
P_max: 3400; W
Nominal impedance
Z: 4; Ω
DC resistance
R_E: 3.6; Ω
Inductance (1kHz)
L_E: 1.7; mH
VC Diameter: 116; mm
Winding height
H_VC: 34; mm
Winding material: Copper
Former material: Glass Fibre
Flux density
B: 1.15; T
Force factor
Bl: 24.8; N/A
Motor constant
Bl/√R_E: 13.1; N/√W
Air gap height
H_AG: 14; mm
Material: Neodymium Inside Slug
Effective diameter: 462; mm
Effective area
S_D: 1680; cm²
Moving mass
M_MS: 335; g
Moving mass (without air load)
M_MD: 286.8; g
Material: Waterproof Both Sides
Stiffness
K_MS: 13.16; N/mm
Compliance
C_MS: 76; µm/N
Equivalent volume to the compliance
V_AS: 278; L
Mechanical resistance
R_MS: 9.02; N·s/m
Spider material: Silicone
Nominal diameter: 21; ″
: 530; mm
Overall diameter: 547; mm
Baffle cutout diameter: 503; mm
Overall depth: 249; mm
Flange thickness: 14; mm
Mounting depth: 235; mm
Volume occupied by the driver: 15.0; L
Net weight: 14.0; kg

Datasheet

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B&C Speaker 21SW115

Subwoofer

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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