LF
Mid-Woofer
8"
8NPM
Code: 8NPMX8-157
Mid-Woofer/8inch/Neo/Paper/200W/8ohm
Key Features
- Hi sensitivity
- Hi power handling
- Designed for applications where are sizable amounts of mid-frequencies required
Quick Specs
Impedance
8 Ω
Program Power
400 W
Sensitivity
96.06 dB
Fs
79.00 Hz
Magnet
Neodymium
Voice Coil
50.8 mm
Design Notes
The 8NPM is a high efficiency, (96dB 1watt / 1 meter) 8-inch mid-woofer with extended mid frequency response and high power handling capability. The 8NPM uses a lightweight half pressed paper cone along with a double roll fabric surround. Spider is made of Nomex material with optimized shape for well controlled pistonic motion. The used high quality components ensure long lasting 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 in excess of 280C, 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 8NPM delivers incredibly high performance.
Power Handling
The voice coil featuring Kapton former material capable of withstanding peak temperatures in excess of 280C, 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 8NPM delivers incredibly high performance.
Specifications
General Specs
Nominal Diameter
8"
Rated Impedance
8 Ohm
Magnet
Neodymium
Basket Material
Aluminum
Power Handling
AES Power
200 W
Continuous Power
400 W
Peak Power
800 W
Voice Coil
Diameter
50.8 mm
Winding Wire
CCAW
Former
Kapton
Winding Height
15.4 mm
T/S Parameters
Resonant Frequency (Fs)
79.00 Hz
Re
5.40 \u2126
Qes
0.310
Qms
3.85
Qts
0.290
Vas
10.90 liters
Sd
213.80 cm\u00B2
Mms
23.90 grams
Rms
3.10
Cms
0.1700
Bl
14.20 T\u00B7m
Le
0.600 mH
Sensitivity
96.06 dB
Design Details
Surround Material
fabric
Cone/Dome Material
Paper CF
Spider
Nomex
T-Plate
8 mm
Xmax (peak)
3.7 mm
Xmech
11.7 mm
Overall Diameter
209.50 mm
Bolt Circle Diameter
197.50 mm
Baffle Cutout Dia.
185.00 mm
Mounting Holes
8
Depth (flange to rear)
87.30 mm
Net Weight
1.80 kg
Ordering Codes
Product Code
8NPMX8-157
Downloads
Frequency Response & Impedance
2D Drawing
Enclosure Recommendations
Recommended enclosure alignments (bass reflex): - 10 liters tuned to 82 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 75 Hz, HP filter 74 Hz - 12 liters tuned to 72 Hz: balanced response, general-purpose (recommended); -3 dB approx. 61 Hz, HP filter 62 Hz - 14 liters tuned to 63 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 54 Hz, HP filter 51 Hz
Frequently Asked Questions
- - Hi sensitivity
- - Hi power handling
- - Designed for applications where are sizable amounts of mid-frequencies required
Recommended enclosure alignments (bass reflex): - 10 liters tuned to 82 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 75 Hz, HP filter 74 Hz - 12 liters tuned to 72 Hz: balanced response, general-purpose (recommended); -3 dB approx. 61 Hz, HP filter 62 Hz - 14 liters tuned to 63 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 54 Hz, HP filter 51 Hz
High-efficiency vented pa mid-woofer or bass-mid cabinet; weight-critical installs
AES Power: 200 W,
Continuous: 400 W,
Peak: 800 W.
Sensitivity: 96.06 dB (1W/1m).
