Celestion NTR08-2009D

Name: NTR08-2009D
Brand: Celestion

Low frequency

8″ / 203 mm

Nominal diameter

71 Hz

Resonance

0.21

Q factor

94 dB

Sensitivity

± 6.5 mm

Linear excursion

400 W

Program Power

Sensitivity (1W, 1m, infinite baffle)
SPL_1W: 94.1; dB
Frequency response: 70 - 5000; Hz
Resonance frequency (free air)
f_S: 71.4; Hz
Mechanical quality factor
Q_MS: 2.04
Electrical quality factor
Q_ES: 0.24
Total quality factor
Q_TS: 0.21
Maximum linear excursion
x_max: 6.5; mm
Air volume displaced at x_max
V_D: 148; cm³
Power handling
P: 200; W
Program power
P_max: 400; W
Nominal impedance
Z: 8; Ω
DC resistance
R_E: 5.5; Ω
Inductance (1kHz)
L_E: 0.48; mH
VC Diameter: 50; mm
Winding height
H_VC: 18; mm
Winding material: Edgewound copper
Former material: Glass fibre
Force factor
Bl: 18.03; N/A
Motor constant
Bl/√R_E: 7.69; N/√W
Air gap height
H_AG: 10; mm
Material: Neodymium
Effective diameter: 170; mm
Effective area
S_D: 227; cm²
Moving mass
M_MS: 31.1; g
Moving mass (without air load)
M_MD: 28.4; g
Material: Kevlar loaded paper (weather-resistant)
Stiffness
K_MS: 6.25; N/mm
Compliance
C_MS: 160; µm/N
Equivalent volume to the compliance
V_AS: 11.7; L
Mechanical resistance
R_MS: 6.85; N·s/m
Surround material: Cloth-sealed
Nominal diameter: 8; ″
: 203; mm
Overall diameter: 225; mm
Baffle cutout diameter: 187; mm
Overall depth: 100; mm
Volume occupied by the driver (estimated): 1.0; L
Net weight: 2.8; kg
Frame material: Cast aluminium

Datasheet

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Celestion NTR08-2009D

Low frequency

Thiele & Small parameters

Large signal parameters

Voice Coil

Magnet

Diaphragm

Suspensions

Dimensions

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