Eminence SIGMA PRO 18A-2

Name: SIGMA PRO 18A-2
Brand: Eminence

Subwoofer

18″ / 457 mm

Nominal diameter

28 Hz

Resonance

0.29

Q factor

96 dB

Sensitivity

± 6.1 mm

Linear excursion

1300 W

Program Power

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Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 96.2; dB
Frequency response: 41 - 2400; Hz
Resonance frequency (free air)
f_S: 28.0; Hz
Mechanical quality factor
Q_MS: 8.28
Electrical quality factor
Q_ES: 0.30
Total quality factor
Q_TS: 0.29
Maximum linear excursion
x_max: 6.1; mm
Maximum excursion before damage
x_lim: 18.0; mm
Air volume displaced at x_max
V_D: 695; cm³
Power handling
P: 650; W
Program power
P_max: 1300; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 6.3; Ω
Inductance (1kHz)
L_E: 1.9; mH
VC Diameter: 76; mm
Winding material: Copper
Former material: Polyimide
Force factor
Bl: 22.1; N/A
Motor constant
Bl/√R_E: 8.81; 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: 130; g
Moving mass (without air load)
M_MD: 102.7; g
Material: Paper
Stiffness
K_MS: 4.17; N/mm
Compliance
C_MS: 240; µm/N
Equivalent volume to the compliance
V_AS: 441; L
Mechanical resistance
R_MS: 2.76; 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

Eminence SIGMA PRO 18A-2 SPL & Impedance

Datasheet

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Eminence SIGMA PRO 18A-2

Subwoofer

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Specifications

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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