Celestion International Ltd, Claydon Business Park, Great Blakenham, Ipswich IP6 ONL, UK
+44 (0)1473 835300 [email protected] www.celestionprofessional.com
Celestion adopts a progressive policy and reserve the right to alter drive unit specifications and/or appearance without prior notice 08/05
FTR18-4080HDX
General Specifications
Nominal diameter (mm/in) .......................................457/18
Power Rating (AES, W rms).........................................1000
Nominal impedance (
Ω
) ...................................................8
Voice coil diameter (mm/in) .................................101.6/4.0
Magnet type .............................................................Ferrite
Chassis type ...............................................Cast aluminium
Sensitivity (dB) ...............................................................95
Frequency range (Hz) ............................................30-2500
Coil material..................................................Round copper
Former material.................................................Glass Fibre
Cone material.................................Glass loaded paper with
...........................................weather resistant impregnation
Surround material............................................Cloth-sealed
Suspension..............................................................Double
Xmax (mm/in) .......................................................8.0/0.33
Gap depth (mm/in)..............................................10.0/0.40
Voice coil winding width (mm/in)..........................25.0/0.99
Small Signal Parameters
D (m/in)............................................................0.38/14.96
F
s
(Hz) ........................................................................35.5
M
md
(g/oz)......................................................177.41/6.26
M
air
(g/oz).........................................................21.61/0.76
Q
ms
............................................................................5.74
Q
es
.............................................................................0.46
Q
ts
.............................................................................0.42
R
e
(
Ω
) ........................................................................5.01
V
as
(lt/ft
3
) ..........................................................184.24/6.5
BI (Tm) .....................................................................22.11
C
ms
(mm/N) ................................................................0.10
R
ms
(kg/s) ...................................................................7.72
L
e
(mH).......................................................................1.81
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).........10 x 6.5/0.4 x 0.26
Number of mounting slots ................................................8
Mounting slot PCD range (mm/in) .....429-440/16.89-17.32
Unit weight (kg/lb).................................................9.8/21.6
Packed Dimensions & 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) ...................................11.6/25.6
Multipack (24) size W x D x H (mm/in) ..........1210 x 1050 x
.....................................................980/47.6 x 41.3 x 35.4
Multipack (24) weight (kg/lb) .................................260/572
Unit conditioned prior to measurement.
• 18" ferrite subwoofer offers 1000Wrms (AES) continuous power
handling and a frequency response of 30Hz-2500Hz
• 4" high temperature Inside/Outside voice coil efficiently
dissipates heat, preventing sensitivity loss through
thermal compression
• Double suspension and a “multi-roll” surround provide
exceptional linearity at extremes of cone excursion
• Intelligent heat management in both chassis and magnet
assembly design further minimizes distortion
• Less than 10kg – very low weight for this product class
60
80
100
20
40
60
Frequency Response and Impedance Curves
Measured - 1W @ 1m, 2
π
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