Data Sheet

LF Cast Chassis / Ferrite
FTR15-3070C
Features
15" ferrite woofer provides 400Wrms power handling (AES Standard) and 99dB
sensitivity
3" high temperature Inside/Outside voice coil efficiently dissipates heat,
preventing sensitivity loss through thermal compression
FlexirolTM surround for greater excursion control
Saturated gap technology for lower harmonic distortion
Low frequency response, down to 40Hz
Smart chassis design minimises acoustic distortion
8 Ω Frequency Response
1. Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power
calculated on minimum impedance. Loudspeaker tested in free air.
2. Measured on axis at 1W, 1m in 2 anechoic environment.
3. Xmax derived from: (voice coil winding width-gap depth)/2.
General Specifications
Nominal diameter 381mm/15in
Power rating1 400Wrms
Nominal impedance 8 Ω
Sensitivity2 99dB
Frequency range 40-4000Hz
Voice coil diameter 75mm/3in
Chassis type Cast Aluminium
Magnet type Ferrite
Magnet weight 2.3kg/81oz
Coil material Round copper
Former material Glass fibre
Cone material Glass loaded paper with weather-resistant
impregnation
Surround material Cloth-sealed
Suspension Single
Xmax
3
3mm/0.12in
Gap depth 10mm/0.39in
Voice coil winding width 16mm/0.63in
Small Signal Parameters
D 0.33m/12.99in
Fs 40Hz
Mms 84.15g/2.97oz
Mmd 70.00g/2.47oz
Qms 7.10
Qes 0.38
Qts 0.36
Re 6.50 Ω
Vas 208.0lt/7.34ft3
BI 18.70Tm
Cms 0.20mm/N
Rms 2.86kg/s
Le (at 1kHz) 0.59mH
Mounting Information
Diameter 385mm/15.16in
Overall depth 158mm/6.22in
Cut-out diameter 351mm/13.82in
Mounting slot dimensions 10mm x 7mm/0.39in x 0.27in
Number of mounting slots 8
Mounting PCD range 365-375mm/14.37-14.76in
Unit weight 6.3kg/13.8lb
Packed Dimensions & Weight
Single pack size W x D x H 435mm x 435mm x 200mm
/17.1in x 17.1in x 7.9in
Single pack weight 7.7kg/17.0lb
Multipack (36) size W x D x H 1200mmx1000mmx980mm
/47.2in x 39.4in x 38.6in
Multipack (36) weight 278kg/613lb
Celestion, Claydon Business Park, Great Blakenham, Ipswich, IP6 0NL United Kingdom