Professional Loudspeakers
Your Global Driver Solutions Partner
Celestion International Ltd, Claydon Business Park, Great Blakenham, Ipswich IP6 ONL, UK
Celestion adopts a progressive policy and reserve the right to alter drive unit specifications and/or appearance without prior notice 08/05
TF1525
General Specifications
Nominal diameter (mm/in)...................................... 381/15
Power rating (AES, W rms) ......................................... 250
Nominal impedance (
Ω
) ................................................. 8
Voice coil diameter (mm/in).................................. 63.5/2.5
Magnet type............................................................ Ferrite
Magnet weight (kg/oz)..............................................1.2/42
Chassis type ................................................. Pressed steel
Sensitivity (dB) .............................................................. 98
Frequency range (Hz)........................................... 40-3000
Coil material ............................................... Round copper
Former material .................................................. Polyimide
Cone material ..................................... Kevlar loaded paper
Surround material .......................................... Cloth-sealed
Suspension ............................................................. Single
Xmax (mm/in)...................................................... 2.4/0.09
Gap depth (mm/in)............................................... 8.0/0.31
Voice coil winding width (mm/in) ....................... 12.7/0.50
Small Signal Parameters
D (m/in) .......................................................... 0.33/12.99
Fs(Hz) .......................................................................... 46
Mair (g/oz) .................................................... 14.15/0.499
Mmd (g/oz) ...................................................... 61.70/2.18
Qms .......................................................................... 6.24
Qes ........................................................................... 0.71
Qts ........................................................................... 0.64
Re(
Ω
) ...................................................................... 5.40
Vas (lt/ft3) ........................................................ 162.1/5.72
Bl (Tm) ................................................................... 12.90
Cms (mm/N) .............................................................. 0.16
Rms (kg/s) ................................................................. 3.52
Le(mH).......................................................................0.82
Mounting Information
Overall diameter (mm/in) .................................. 385/15.16
Overall depth (mm/in).......................................... 153/6.02
Cut-out diameter (mm/in).................................. 351/13.82
Mounting slot dimensions (mm/in)..... 9.2 x 6.2/0.36 x 0.24
Number of mounting slots ............................................... 8
Mounting PCD range (mm/in) ............................ 369/14.56
Unit weight (kg/lb)................................................ 5.2/11.5
Packed Dimensions & Weight
Single pack size W x D x H (mm/in)...........410 x 410 x 180
............................................................ /16.1 x 16.1 x 7.1
Single pack weight (kg/lb) ...................................... 5/11.0
Multi pack (45) size W x D x H (mm/in) .... 1200 x 1000 x 980
.......................................................... /47.2 x 39.4 x 38.6
Multi pack (45) weight (kg/lb) .............................. 225/496
• High output bass and mid range driver
• Optimised for 2-way systems
• Vented magnet assembly for enhanced cooling
• High temperature copper voice coil wound on polyimide for
increased reliability
• Excellent performance at cost effective price point
Frequency Response and Impedance Curves
FREQUENCY (Hz) Measured - 1W @ 1m, 2π
