Celestion FTR15-3070E 400W 8OHM LF FERRITE
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Celestion - FTR15-3070E 400W 8ohm - LF Die Cast Chassis Loudspeaker - Ferrite


- 15" ferrite woofer provides 400Wrms power handling (AES Standard) and 97dB sensitivity

- 3" high temperature Inside/Outside voice coil efficiently dissipates heat, preventing sensitivity loss through thermal compression

- FlexirolTM surround for greater excursion control

- Low frequency response, down to 40Hz

- Smart chassis design minimises acoustic distortion

- Specially treated weather-resistant cone

General Specifications

Nominal diameter: 381mm/15in

Power rating(1): 400Wrms

Continuous power rating(2): 800W

EIA power rating(3): 550W

Nominal impedance: 8ohm

Sensitivity(4): 97dB

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(5): 5.5mm/0.22in

Gap depth: 9mm/0.35in

Voice coil winding width: 20mm/0.79in

Small Signal Parameters4

D: 0.33m/8.38in

Fs: 45.3Hz

Mms: 88.69g/3.13oz

Qms: 3.07

Qes: 0.46

Mmd: 74.54g/2.63oz

Qts: 0.40

Re: 5.36ohm

Vas: 143.85lt/5.08ft3

BI: 17.24Tm

Cms: 0.14mm/N

Rms: 8.22kg/s

Le (at 1kHz): 1.3mH

Mounting Information

Overall diameter: 385mm/15.16in

Overall depth: 161mm/6.34in

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: 6.4kg/14.1lb


(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)Continuous Power Handling is defined as 3dB greater than the AES rating.

(3)Tested as per the EIA-426-A standard.

(4)Measured on axis at 1W, 1m in 2pi anechoic environment.

(5)Xmax derived from: (voice coil winding width-gap depth)/2.

(6)Small signal parameters measured after unit subjected to pre-conditioning signal.

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