NTR08-2009D
8-inch cast aluminium chassis, neodymium magnet mid/bass driver
- Coated Kevlar-loaded cone for enhanced weather resistance
- Vented magnet assembly for more efficient cooling
Specifications
400W
Continuous power rating
94.5dB
Sensitivity
2in
Voice coil diameter
Nominal diameter
203mm / 8in
Power rating
200W
Continuous power rating
400W
Rated impedance
8Ω
Sensitivity
94.5dB
Frequency range
70-5000Hz
Chassis type
Cast aluminium
Magnet type
Neodymium
Voice coil diameter
50mm / 2in
Voice coil material
Edgewound copper
Former material
Glass fibre
Cone material
Kevlar loaded paper (weather-resistant)
Surround material
Cloth-sealed
Suspension
Single
Gap height (Hg)
10mm / 0.39in
VC winding height (Hvc)
18mm / 0.67in
Additional impedances
16Ω
Parameters
Sd
226.98cm2 / 35.18in2
Fs
71.40Hz
Mms
31.06g / 1.10oz
Qms
2.035
Qes
0.236
Qts
0.211
Re
5.50Ω
Vas
11.65l / 0.41ft3
BI
18.03Tm
Cms
0.16mm/N
Rms
6.85kg/s
Le (at 1kHz)
0.48mH
Xmax
6.5mm / 0.26in
Mounting Information
Overall diameter
225mm / 8.8in (octagonal profile)
Overall depth
100mm / 4.2in
Cut-out diameter
187mm / 7.4in
Mounting hole dimensions
6.5mm / 0.26in Ø
Number of mounting holes
8
Mounting hole PCD
210mm / 8.3in
Unit weight
2.8kg / 6.2lb
Packed Dimensions & Weight
Multi pack qty
8
Multi pack size W x D x H
450mm x 380mm x 260mm / 17.7in x 15.0in x 10.2in
Multi pack weight
24kg / 52.8lb
Frequency Response and Impedance Curves
Topmost curve: Frequency response on axis | Secondary curve: Frequency response at 45° off axis
Power rating: Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.
Continuous power rating: Defined as 3dB greater than the AES rating.
Sensitivity: Measured on axis at 1W, 1m in 2π anechoic environment.
Parameters: Measured after unit subjected to pre-conditioning signal.
Xmax: 0.5*(Hvc-Hg) + 0.25*Hg
