BACK TO TOP
APPLICATION:
• Ideal for two-way and multi-way (line arrays) enclosure designs,
where small size and weight factor is required.
81NPM
SPECS PDF
DRAWING PDF
<< BACK
NEODYMIUM MID-WOOFER
Ordering code: 81NPM-263
CONT. POWER
SENS.
Fs
Freq. Range
VC Dia.
IN-OUT WOUND
VC Wire
Cone /
Surround
Magnet
Type
1000 WATTS
95 dB
64 Hz
70-
4,000 Hz
3.0"
OUTSIDE
CCAW
PAPER w. CF
FABRIC
NEO
The 81NPM was designed for good reproduction
of voice. With an extended low-frequency response, this mid-woofer is highly suitable for two-way and multi-way systems. It’s high power handling capabilities extend the ideal usage as a mid-range driver in line-array systems. The 81NPM uses a lightweight half-pressed paper cone reinforced by our proprietary cone treatment, which also works as weatherization protection. The used high-quality components ensure long-last- ing performance even in high powered applications. The chosen material combination provides remarkable strength, high efficiency and sustained output under extreme conditions.
Power Handling
The voice coil featuring Kapton former material capable of withstanding peak temperatures above 300°C, well beyond
the thermal requirements of modern audio systems. Former strength provides the ideal transfer of power between the voice coil and the cone assembly and assists in reducing distortion artifacts. By combining this material with state of the art adhesives and our winding voice coil technology, the 81NPM delivers incredibly high performance.
GENERAL SPECIFICATIONS:
Nominal Diameter
200 mm (8 in.)
Rated Impedance
8 ohm
Power Handling
AES Power
500 watts
PROGRAM Power
1000 watts
PEAK Power
2000 watts
Power Compression
@ -10dB
0.4 dB
@ 0dB
0.9 dB
@ Max. Power
1.8 dB
Max. Recommended X-OVER Freq.
3,000 Hz
Recommended Enclosure Volume
4 - 20 Liters
Cone Design / Cone Material
Exp. Gmtry, REDCATT Pulp
Voice Coil Diameter / Winding
3.0"
Voice coil Winding Height
22.5 mm
Front Plate Thickness
10 mm
T/S Parameters:
Fs
64 Hz
Re
5.2 Ohm
Sd
221.7 cm2
Qms
7.98
Qes
0.321
Qts
0.308
Vas
10.7 Liters
Mms
40 g
Bl product (Force Factor)
16.0 Tm
Peak To Peak Displacement
17.5 mm
Le (mH @ 1kHz)
0.53
Mechanical Parameters:
Overall Diameter
210 mm
No. Of Mounting Holes
8
Bolt Circle Diameter
195 mm
Front Mount Baffle cutout
187 mm Nominal
Rear Mount Baffle cutout
192 mm Nominal
Total Depth
110 mm
Flange and gasket thickness
11 mm
Packaging info:
Net Weight
1.75 kg (3.86 lbs.)
Shipping Weight
2.1 kg (4.6 lbs.)
Packaging Dimensions
30x30x16cm (11.8x11.8x6.3 in.)