Product Description

Celestion FTR Series drivers feature advanced, high-temperature voice coils and smart chassis design for maximum heat dissipation with reduced reflections back on the cone. Similarly innovative magnet topology floods the gap around the pole piece, limiting the interference from transient flux. The result is a cost-effective range of high-value 12, 15 and 18 inch cast- frame low frequency drivers that set new standards for high power handling with minimal thermal compression, and low acoustic and harmonic distortion.

Features
# 600 Watts RMS continuous power handling (measured to AES Standard)

# Flexirol technology for greater excursion control

# Saturated gap technology for lower harmonic distortion

# Extremely low frequency response, down to 30Hz

# Smart chassis design minimizes acoustic distortion

# Specially treated weather-resistant cone

Technical Description

General specifications
Nominal diameter (mm/in): 457/18

Power Rating (AES, W rms): 600

Nominal impedance (Ohm): 8

Voice coil diameter (mm/in): 100/4

Magnet type: Ferrite

Magnet weight (kg/oz): 3.1/110

Chassis type: Cast aluminum

Sensitivity (dB): 97

Frequency range (Hz): 30-3000

Coil material: Round copper

Former material: Glass fibre

Cone material: Glass loaded paper with weather resistant impregnation

Surround material: Cloth-sealed

Suspension: Single

Xmax (mm/in): 6.0/0.24

Gap depth (mm/in): 10.0/0.39

Voice coil winding width (mm/in): 22.0/0.87

Small Signal Parameters
D (m/in): 0.38/14.96

Fs (Hz): 32.7

Mmt (g/oz): 158.22/5.58

Mmd (g/oz): 136.61/4.82

Mair -
Qms: 5.24
Qes: 0.32
Qts: 0.30

Re (Ohm): 5.31

Vas (lt/ft3): 271.99/9.6

BI (Tm): 23.31

Cms (mm/N): 0.15

Rms (kg/s): 6.21

Le (mH): 1.46

Mounting Information
Overall diameter (mm/in): 462/18.19

Overall depth (mm/in): 205/8.07

Cut-out diameter (mm/in): 416/16.38

Mounting slot dimensions (mm/in): 7 x 10/0.28 x 0.39

Number of mounting slots: 8

Mounting slot PCD range (mm/in): 429-440/16.89-17.32

Unit weight (kg/lb): 9.7/21.4

Packed Dimensions and Weight
Single pack size W x D x H (mm/in): 500 x 500 x 240/19.7 x 19.7 x 9.4

Single pack weight (kg/lb): 11.5/25.4

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