Eighteen Sound 21NLW9001 8Ω

8Ω

Subwoofer

21″ / 533 mm

Nominal diameter

32 Hz

Resonance

0.31

Q factor

95 dB

Sensitivity

± 14 mm

Linear excursion

3600 W

Program Power

Eighteen Sound 21NLW9001 8Ω Subwoofer

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 95.0; dB
Frequency response: 25 - 1500; Hz
Resonance frequency (free air)
f_S: 32.0; Hz
Mechanical quality factor
Q_MS: 4.50
Electrical quality factor
Q_ES: 0.34
Total quality factor
Q_TS: 0.31
Maximum linear excursion
x_max: 14.0; mm
Air volume displaced at x_max
V_D: 2327; cm³
Power handling
P: 1800; W
Program power
P_max: 3600; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 5.9; Ω
Inductance (1kHz)
L_E: 3.1; mH
VC Diameter: 135; mm
Force factor
Bl: 37.0; N/A
Motor constant
Bl/√R_E: 15.2; N/√W
Material: Neodymium
Effective diameter: 460; mm
Effective area
S_D: 1662; cm²
Moving mass
M_MS: 390; g
Moving mass (without air load)
M_MD: 342.5; g
Material: Water,UV repellent
Stiffness
K_MS: 15.87; N/mm
Compliance
C_MS: 63; µm/N
Equivalent volume to the compliance
V_AS: 244; L
Mechanical resistance
R_MS: 17.43; N·s/m
Nominal diameter: 21; ″
: 533; mm
Overall diameter: 545; mm
Baffle cutout diameter: 492; mm
Overall depth: 250; mm
Flange thickness: 18; mm
Mounting depth: 232; mm
Volume occupied by the driver (estimated): 9.1; L
Net weight: 13.4; kg

Eighteen Sound 21NLW9001 8Ω SPL

Eighteen Sound 21NLW9001 8Ω Dimensions

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