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
TN1225
General Specifications
Nominal diameter (mm/in) .......................................305/12
Power Rating (AES, W rms) ..........................................250
Nominal impedance (
Ω
) ...................................................8
Voice coil diameter (mm/in) ...................................63.5/2.5
Magnet type.....................................................Neodymium
Chassis type ..................................................Pressed steel
Sensitivity (dB) ...............................................................97
Frequency range (Hz) ............................................50-4000
Coil material..................................................Round copper
Former material ...................................................Polyimide
Cone material.......................................Kevlar loaded paper
Surround material............................................Cloth-sealed
Suspension...............................................................Single
Xmax (mm/in) .....................................................2.5/0.099
Gap depth (mm/in)................................................8.0/0.32
Voice coil winding width (mm/in)..........................13.0/0.51
Small Signal Parameters
D (m/in)............................................................0.26/10.24
Fs(Hz) ........................................................................60.5
Mmd (g/oz)........................................................44.23/1.74
Mair (g/oz)...........................................................6.92/0.24
Qms ............................................................................3.03
Qes.............................................................................0.37
Qts .............................................................................0.33
Re(
Ω
) ........................................................................5.18
Vas (lt/ft
3
) ..........................................................53.92/1.90
BI (Tm) .....................................................................16.48
Cms (mm/N) ................................................................0.14
Rms (kg/s) ...................................................................6.43
Le(mH).......................................................................0.63
Mounting Information
Overall Diameter (mm/in)....................................309/12.17
Overall depth (mm/in)...........................................132/5.20
Cut out diameter (mm/in) ...................................283/11.14
Mounting slot dimensions (mm/in)......................Ø 7.9/0.31
Number of mounting slots ................................................4
Mounting slot PCD (mm/in).................................297/11.69
Unit weight (kg/lb)...................................................2.0/4.4
Packed Dimensions & Weight
Single pack size W x D x H (mm/in)...........330 x 330 x 150
............................................................./13.0 x 13.0 x 5.9
Single pack weight (kg/lb) .......................................2.4/5.3
Multipack (60) size W x D x H (mm/in).....1008 x 980 x 860
.........................................................../39.7 x 38.6 x 33.9
Multipack (60) weight (kg/lb) .................................146/322
Unit conditioned prior to measurement.
• Bass and mid range driver that has high sensitivity and excellent
power handling characteristics
• Features compact and lightweight neodymium magnet assembly
• Smart use of venting and specially designed heatsink for reduced
thermal compression
• Effective flux management enables increased sensitivity
