Eighteen Sound 21NLW4100 8Ω

Name: 21NLW4100 8Ω
Brand: Eighteen Sound

4Ω

8Ω

Subwoofer

21″ / 533 mm

Nominal diameter

36 Hz

Resonance

0.46

Q factor

94 dB

Sensitivity

± 15.2 mm

Linear excursion

3000 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 94.2; dB
Frequency response: 32 - 300; Hz
Resonance frequency (free air)
f_S: 36.0; Hz
Mechanical quality factor
Q_MS: 7.80
Electrical quality factor
Q_ES: 0.49
Total quality factor
Q_TS: 0.46
Maximum linear excursion
x_max: 15.2; mm
Air volume displaced at x_max
V_D: 2525; cm³
Power handling
P: 1500; W
Program power
P_max: 3000; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 5.1; Ω
Inductance (1kHz)
L_E: 2.1; mH
VC Diameter: 100; mm
Winding height
H_VC: 36.5; mm
Winding material: Copper
Force factor
Bl: 29.4; N/A
Motor constant
Bl/√R_E: 13.0; N/√W
Air gap height
H_AG: 12.4; mm
Material: Neodymium
Effective diameter: 460; mm
Effective area
S_D: 1661; cm²
Moving mass
M_MS: 374; g
Moving mass (without air load)
M_MD: 326.5; g
Material: Water repellent
Stiffness
K_MS: 19.23; N/mm
Compliance
C_MS: 52; µm/N
Equivalent volume to the compliance
V_AS: 210; L
Mechanical resistance
R_MS: 10.85; N·s/m
Nominal diameter: 21; ″
: 533; mm
Overall diameter: 545; mm
Baffle cutout diameter: 492; mm
Overall depth: 247; mm
Flange thickness: 7; mm
Mounting depth: 240; mm
Volume occupied by the driver (estimated): 7.7; L
Net weight: 10.5; kg

Datasheet

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Eighteen Sound 21NLW4100 8Ω

Subwoofer

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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