ESX SX1240

Name: SX1240
Brand: ESX

Subwoofer

12″ / 300 mm

Nominal diameter

28 Hz

Resonance

0.35

Q factor

88 dB

Sensitivity

± 8.5 mm

Linear excursion

1000 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 88.1; dB
Resonance frequency (free air)
f_S: 28.0; Hz
Mechanical quality factor
Q_MS: 5.30
Electrical quality factor
Q_ES: 0.37
Total quality factor
Q_TS: 0.35
Maximum linear excursion
x_max: 8.5; mm
Maximum excursion before damage
x_lim: 16.0; mm
Air volume displaced at x_max
V_D: 429; cm³
Power handling
P: 500; W
Program power
P_max: 1000; W
Nominal impedance
Z: 4; Ω
DC resistance
R_E: 3.2; Ω
Inductance (1kHz)
L_E: 1.1; mH
VC Diameter: 50; mm
Winding height
H_VC: 25; mm
Former material: Aluminium
Force factor
Bl: 14.0; N/A
Motor constant
Bl/√R_E: 7.83; N/√W
Diameter: 156; mm
Height: 40; mm
Weight: 2.835; kg
Effective diameter: 254; mm
Effective area
S_D: 505; cm²
Moving mass
M_MS: 142; g
Moving mass (without air load)
M_MD: 133.7; g
Material: Non-pressed Paper
Stiffness
K_MS: 4.46; N/mm
Compliance
C_MS: 224; µm/N
Equivalent volume to the compliance
V_AS: 81; L
Mechanical resistance
R_MS: 4.71; N·s/m
Surround material: Rubber
Spider material: Single Nomex
Nominal diameter: 12; ″
: 300; mm
Overall diameter: 315; mm
Baffle cutout diameter: 282; mm
Mounting depth: 140; mm
Volume occupied by the driver (estimated): 3.7; L
Net weight: 8.2; kg
Frame material: Diecast Aluminium

Datasheet

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ESX SX1240

Subwoofer

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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