Professional Loudspeakers
Your Global Driver Solutions Partner
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
NTR10-2520D
General Specifications
Nominal diameter (mm/in) ...................................... 254/10
Power Rating (AES, W rms) ......................................... 250
Nominal impedance (
Ω
) ................................................. 8
Voice coil diameter (mm/in) .................................. 63.5/2.5
Frequency range (Hz) ........................................... 55-3500
Sensitivity (dB) .............................................................. 96
Chassis type.............................................. Cast Aluminium
Magnet type.................................................... Neodymium
Magnet weight (kg/oz)............................................3.1/110
Coil material ..................................Copper Clad Aluminium
Cone material....................................... Glass loaded paper
Surround material ...........................................Cloth sealed
Suspension ..............................................................Single
Xmax (mm/in) ......................................................4.0/0.16
Gap Depth (mm/in) ..............................................8.0/0.32
Voice coil winding width (mm/in) .........................16.0/0.63
Small Signal Parameters
D (m/in)..............................................................0.21/8.27
F
s
(Hz) ....................................................................... 61.9
M
md
(g/oz) ....................................................... 34.64/1.22
M
air
(g/oz) ...........................................................3.64/0.12
Q
ms
............................................................................3.27
Q
es
.............................................................................0.44
Q
ts
............................................................................ 0.39
R
e
(
Ω
) ........................................................................5.87
V
as
(lt/ft
3
) ..........................................................29.33/1.04
BI (Tm) .................................................................... 14.05
C
ms
(mm/N) ............................................................... 0.17
R
ms
(kg/s).................................................................. 4.55
L
e
(mH).......................................................................0.55
Mounting Information
Overall diameter (mm/in) .................................. 260/10.24
Overall depth (mm/in).......................................... 113/4.45
Cut-out diameter (mm/in) .................................... 232/9.13
Mounting slot dimensions (mm/in) ........... 6.5/0.26x7.5/0.3
Number of mounting slots ............................................... 4
Mounting PCDrange (mm/in).....................244-247/9.6-9.7
Unit weight (kg/lb)................................................ 2.2/4.89
Packed Dimensions & Weight
Multi pack (96) size W x D x H (mm/in) ....... 1080x880x840
.............................................................. /42.5x34.6x33.1
Multi pack (96) weight (kg/lb) ............................... 235/518
• 10" neodymium mid/bass unit offers 250Wrms (AES)
continuous power handling and 96dB sensitivity
• 2.5" high temperature Inside/Outside voice coil efficiently
dissipates heat, preventing sensitivity loss through
thermal compression
• M-roll surround provides progressive excursion control,
yielding a smooth response even at extremes of
frequency range
• Extremely lightweight design combined with a highly
efficient magnet assembly results in exceptional
power-to-weight ratio
• Intelligent heat management in both chassis and
magnet assembly design further minimises distortion
Frequency Response and Impedance Curves
Measured - 1W @ 1m, 2
π
