NEW  8" Coaxial Neodymium Loudspeaker, 2.5" LF + 1.75" HF voice coil, 250 W + 40 W , 98 dB +110 dB

 

oberton coaxial 8NMB250VCX

KEY FEATURES:

  • 98 db SPL 1W / 1m ( LF ) average sensitivity
  • 62 mm ( 2.5”) high temperature voice coil ( LF )
  • 500 W AES program power ( LF )
  • Double aluminium demodulating rings
  • Double neodymium magnet assembly
  • Water protected cone (front)
  • 1” exit HF neodymium compression driver
  • 44 mm (1.75”) HF high temperature voice coil
  • 60 degrees nominal dispersion

 

Application: Compact reflex boxes

The 8NMB250VCX is a 8" / 1" coaxial transducer with integrated HF horn, designed for use in compact reflex enclosures with high SPL and nominal dispersion of 60 degrees. 
The low profile, smooth curvilinear LF cone together with HF horn increase the SPL in vocal range, which ensure big headroom. The cone with water prove protective coating, allowing application in a wide range of environments. The state-of-the-art 62 mm (2.5 in) LF voice coil has Glassfiber former, which together with high temperature resistant resin ensure high reliability by high power.
The double aluminium demodulating rings reduce distortion and inductance and improve transient response. 
The neodymium 1" exit compression driver adopted is our ND2545 model. 
The HF driver diaphragm assembly, using triple layer polyester dome this together with phasing plug improve linearity of frequency response in high end. 
 

SPECIFICATIONS

Nominal diameter
Impedance
Minimum impedance LF
Frequency range
Dispersion angle

LF unit
Sensitivity (200-2000 Hz)
Power Capacity AES ¹
Program Power ²
Voice Coil Diameter
Voice Coil Material
Voice Coil Former
V. C. Winding Depth
Magnet Gap Depth
Cone Material
Basket
Magnet
Flux Density

HF unit
Minimum impedance HF
DC resistance
Sensitivity (1-15 kHz)
Power capacity (1-20 kHz)
Program power
Voice coil diameter
Winding material
Diaphragm material
Flux density

210 mm (8 in)
LF 8 Ohm /HF 16 Ohm
6.87 Ohm
85 - 20000 Hz
60 deg

 

98 dB
250 W
500 W
62 mm (2.5 in)
Aluminium
Glassfiber
12 mm
7 mm.
Paper with carbon fibers
Die Cast Aluminium
Neodymium
1.55 T


12.37 Ohms
10.6 Ohms
110 dB
40 W
80 W
44 mm (1.75 in)
Aluminium
sandwich polyester
1.9 T

THIELE-SMALL PARAMETERS

Fs
Qms
Qes
Qts
Vas
Mms
Re
Sd
Xmax*
Cms
BL 
Le at 1kHz 
85.17 Hz
7.24 
0.168
0.164
10.66 L 
18.30 g
5.40 Ohms 
202 cm2
± 4.25 mm
0.191 mm/N
17.76 T.m
0.068 mH
 

 

1. AES standard. Power is calculated on rated minimum impedance. Measurement is in 18 L box enclosure tuned 82 Hz using a 60-2000 Hz band limited pink noise test signal applied continuously for 2 hours.
2. Program power is defined as 3db greater than AES Power Capacity.
* Linear Mathematical Xmax is calculated as: (Hvc - Hg)/2 + Hg/4 where Hvc is the voice coil depth and Hg is the gap depth.

 

 

MOUNTING INFORMATION

Overall diameter
Depth
Baffle hole diameter
Bolt circle diameter
Mounting holes
Net weight

225 mm (8 in)
162.3 mm
187 mm
210 mm
8 with dia 6.5 mm
3.88 kg

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