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
NTR10-2520E
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
Magnet type.....................................................Neodymium
Chassis type ...............................................Cast aluminium
Sensitivity (dB) ...............................................................96
Frequency range (Hz) ............................................50-3000
Coil material............................................................Copper
Cone material.......................................Kevlar loaded paper
Surround material............................................Cloth-sealed
Suspension...............................................................Single
Xmax (mm/in) .......................................................5.0/0.20
Gap depth (mm/in)................................................8.0/0.32
Voice coil winding width (mm/in)..........................17.5/0.69
Small Signal Parameters
D (m/in)..............................................................0.21/5.33
F
s
(Hz) ........................................................................52.4
M
md
(g/oz)......................................................42.788/1.51
M
air
(g/oz) ...........................................................3.64/0.12
Q
ms
..........................................................................3.008
Q
es
...........................................................................0.334
Q
ts
...........................................................................0.301
R
e
(
Ω
) ........................................................................5.63
V
as
(lt/ft
3
) ........................................................33.78/1.192
BI (Tm) .....................................................................16.05
C
ms
(mm/N) ..............................................................0.199
R
ms
(kg/s) .................................................................5.078
L
e
(mH).......................................................................0.71
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) ..........6.5/0.26 x 7.5/0.3
Number of mounting slots ................................................4
Mounting slot PCD range (mm/in) .............244-247/9.6-9.7
Unit weight (kg/lb).................................................2.2/4.89
Packed Dimensions & Weight
Multipack (96) size W x D x H (mm/in) .......1500x1000x980
................................................................/59.1x39.4x38.8
Multipack (96) weight (kg/lb) .................................240/528
Unit conditioned prior to measurement.
70
90
110
30
50
70
Frequency Response and Impedance Curves
• 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
Measured - 1W @ 1m, 2
π
