Celestion CF1840JD

Name: CF1840JD
Brand: Celestion

Low frequency

18″ / 457 mm

Nominal diameter

37 Hz

Resonance

0.4

Q factor

94 dB

Sensitivity

± 12.5 mm

Linear excursion

2400 W

Program Power

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Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 93.9; dB
Frequency response: 30 - 2500; Hz
Resonance frequency (free air)
f_S: 37.0; Hz
Mechanical quality factor
Q_MS: 4.37
Electrical quality factor
Q_ES: 0.44
Total quality factor
Q_TS: 0.40
Maximum linear excursion
x_max: 12.5; mm
Air volume displaced at x_max
V_D: 1418; cm³
Power handling
P: 1200; W
Program power
P_max: 2400; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 5.3; Ω
Inductance (1kHz)
L_E: 1.16; mH
VC Diameter: 100; mm
Winding height
H_VC: 30; mm
Winding material: Round copper
Former material: Glass fibre
Force factor
Bl: 24.76; N/A
Motor constant
Bl/√R_E: 10.8; N/√W
Air gap height
H_AG: 10; mm
Weight: 3.18; kg
Material: Ferrite
Effective diameter: 380; mm
Effective area
S_D: 1134; cm²
Moving mass
M_MS: 217.4; g
Moving mass (without air load)
M_MD: 190.1; g
Material: Kevlar loaded paper
Stiffness
K_MS: 11.11; N/mm
Compliance
C_MS: 90; µm/N
Equivalent volume to the compliance
V_AS: 155; L
Mechanical resistance
R_MS: 11.56; N·s/m
Surround material: Cloth-sealed
Nominal diameter: 18; ″
: 457; mm
Overall diameter: 460; mm
Baffle cutout diameter: 414; mm
Overall depth: 220; mm
Volume occupied by the driver (estimated): 6.9; L
Net weight: 11.6; kg
Frame material: Cast aluminium

Datasheet

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Celestion CF1840JD

Low frequency

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Specifications

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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