Eminence SIGMA PRO 18-4

Name: SIGMA PRO 18-4
Brand: Eminence

Subwoofer

18″ / 457 mm

Nominal diameter

32 Hz

Resonance

0.29

Q factor

97 dB

Sensitivity

± 7 mm

Linear excursion

1400 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 97.1; dB
Frequency response: 32 - 2000; Hz
Resonance frequency (free air)
f_S: 32.0; Hz
Mechanical quality factor
Q_MS: 14.79
Electrical quality factor
Q_ES: 0.30
Total quality factor
Q_TS: 0.29
Maximum linear excursion
x_max: 7.0; mm
Maximum excursion before damage
x_lim: 18.0; mm
Air volume displaced at x_max
V_D: 798; cm³
Power handling
P: 700; W
Program power
P_max: 1400; W
Nominal impedance
Z: 4; Ω
DC resistance
R_E: 3.4; Ω
Inductance (1kHz)
L_E: 0.85; mH
VC Diameter: 76; mm
Winding material: Copper
Former material: Polyimide
Force factor
Bl: 16.54; N/A
Motor constant
Bl/√R_E: 9.04; N/√W
Air gap height
H_AG: 9.5; mm
Weight: 3.402; kg
Material: Ferrite
Effective diameter: 381; mm
Effective area
S_D: 1140; cm²
Moving mass
M_MS: 121; g
Moving mass (without air load)
M_MD: 93.7; g
Material: Paper
Stiffness
K_MS: 5.0; N/mm
Compliance
C_MS: 200; µm/N
Equivalent volume to the compliance
V_AS: 361; L
Mechanical resistance
R_MS: 1.64; N·s/m
Surround material: Cloth
Nominal diameter: 18; ″
: 457; mm
Overall diameter: 457; mm
Baffle cutout diameter: 421; mm
Overall depth: 207; mm
Volume occupied by the driver: 6.62; L
Net weight: 11.11; kg
Frame material: Die-cast aluminum

Datasheet

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Eminence SIGMA PRO 18-4

Subwoofer

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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