FTX0820
8-inch cast aluminium chassis, ferrite magnet coaxial driver
- Ferrite magnet assembly acts as common motor for both LF and HF
- Polyimide HF diaphragm
- Demodulation ring
- 100° nominal HF coverage
- HF repair kit available
Specifications
400W
Continuous power rating
94dB
Sensitivity
2in
Voice coil diameter LF
1.4in
Voice coil diameter HF
Nominal diameter
200mm / 8in
Power rating
200W
Continuous power rating
400W
Rated impedance
8Ω
Sensitivity
94dB
Frequency range
70-5000Hz
Chassis type
Cast aluminium
Magnet type
Ferrite
Magnet weight
1.5kg / 54oz
Voice coil diameter
50mm / 2in
Voice coil material
Edgewound copper
Former material
Glass fibre
Cone material
Kevlar loaded paper
Surround material
Cloth-sealed
Suspension
Single
Gap height (Hg)
8mm / 0.31in
VC winding height (Hvc)
12mm / 0.47in
Parameters
Sd
226.98cm2 / 35.18in2
Fs
78.80Hz
Mms
22.66g / 0.80oz
Qms
2.800
Qes
0.310
Qts
0.279
Re
5.85Ω
Vas
13.13I / 0.46ft3
BI
14.56Tm
Cms
0.18mm/N
Rms
4.01kg/s
Le (at 1kHz)
0.62mH
Xmax
4mm / 0.16in
Mounting Information
Overall diameter
225mm / 8.8in (octagonal profile)
Overall depth
123mm / 4.8in
Cut-out diameter
187mm / 7.36in
Mounting hole dimensions
6.5mm / 0.26in Ø
Number of mounting holes
8
Mounting hole PCD
210mm / 8.27in
Unit weight
4.1kg / 9lb
Packed Dimensions & Weight
Single pack size W x D x H
238mm x 238mm x 148mm / 9.3in x 9.3in x 5.8in
Single pack weight
4.7kg / 10.3lb
Multi pack qty
40
Multi pack size W x D x H
890mm x 1100mm x 890mm / 35.08in x 43.3in x 35.0in
Multi pack weight
195kg / 430lb
Additional HF Specifications
Power rating
40W
Continuous power rating
80W
Rated impedance
8Ω
Sensitivity
103dB
Frequency range
1500-20,000Hz
Recommended min. crossover 12dB/oct
2200Hz
Voice coil diameter
34mm / 1.4in
Magnet type
Dual-ferrite magnet motor
Diaphragm material
Polyimide
Surround material
Polyimide
Frequency Response and Impedance Curves
Black: LF response curve | Red: HF response curve
Power rating: 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.
HF power rating: Tested for two hours on plane wave tube using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance.
Continuous power rating: Defined as 3dB greater than the AES rating.
Sensitivity: Measured on axis at 1W, 1m in 2π anechoic environment.
Xmax: 0.5*(Hvc-Hg) + 0.25*Hg
Suggested crossover design available online at celestion.com/speakerworld
Watch
FTX Series Features
