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
NTR12-3018D
General Specifications
Nominal diameter (mm/in) ...................................... 305/12
Power Rating (AES, W rms) ......................................... 300
Nominal impedance (
Ω
) ................................................. 8
Voice coil diameter (mm/in) .................................. 76.2/3.0
Frequency range (Hz) ........................................... 50-4000
Sensitivity (dB) .............................................................. 98
Chassis type.............................................. Cast Aluminium
Magnet type.................................................... Neodymium
Coil material .................................................Round copper
Cone material...................................... Kevlar loaded paper
Surround material ...........................................Cloth sealed
Suspension ..............................................................Single
Xmax (mm/in) .........................................................4/0.16
Gap Depth (mm/in) ..............................................8.0/0.32
Voice coil winding width (mm/in) .........................16.0/0.63
Small Signal Parameters
D (m/in)............................................................0.26/10.24
F
s
(Hz) ....................................................................... 56.4
M
md
(g/oz) ....................................................... 54.41/1.92
M
air
(g/oz)........................................................ 6.92/0.244
Q
ms
............................................................................2.74
Q
es
.............................................................................0.33
Q
ts
............................................................................ 0.29
R
e
(
Ω
) ........................................................................5.77
V
as
(lt/ft
3
) ........................................................51.78/1.828
BI (Tm) .................................................................... 19.61
C
ms
(mm/N) ............................................................... 0.13
R
ms
(kg/s)................................................................ 7.921
L
e
(mH).....................................................................0.778
Mounting Information
Overall diameter (mm/in) .................................... 310/12.2
Overall depth (mm/in).......................................... 137/5.39
Cut-out diameter (mm/in) .................................. 286/11.26
Mounting slot dimensions (mm/in) ......... 6.5/0.26x9.5/0.37
Number of mounting slots ............................................... 8
Mounting PCDrange (mm/in) ..............................294/11.57
Unit weight (kg/lb).................................................. 2.6/5.7
Packed Dimensions & Weight
Multi pack (60) size W x D x H (mm/in) ....... 1080x980x880
.............................................................. /42.5x38.6x34.6
Multi pack (60) weight (kg/lb) ............................... 146/321
• 12" neodymium woofer offers 300Wrms (AES) continuous
power handling and 98dB sensitivity
• 3" 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
Preliminary Data
70
90
110
30
50
70
Frequency Response and Impedance Curves
Measured - 1W @ 1m, 2
π
