LF
Midrange
6.5"
6NPM
Code: 6NPMX8-164
Mid-Range/6.5inch/Neo/Paper/180W/8ohm
Key Features
- Very high efficiency midrange
- Ultra low harmonic distortion
- High power handling
Quick Specs
Impedance
8 Ω
Program Power
360 W
Sensitivity
96.79 dB
Fs
150.00 Hz
Magnet
Neodymium
Voice Coil
44.5 mm
Design Notes
The 6NPM is a very high efficiency, (97 dB 1watt / 1 meter in 1l enclosure) 6-inch midrange speaker with incredibly linear frequency response characteristics and ultra low harmonic distortion artifacts. The 6NPM has extremely high sound quality. The 6NPM uses a lightweight paper pulp, specifically developed for this application. This unique cone provides the ideal weight to strength ratio.
Voice Coil
At the core of the 6NPM is it’s voice coil technology featuring edge wounded aluminum ribbon wire. Unique lightweight and very short former provides the ideal transfer of power between the voice coil and the cone assembly and assists in reducing the distortion artifacts. By combining this material with the state of the art adhesives, the 6NPM delivers incredible performance.
The neodymium magnet is in a direct contact with the CNC exposed aluminum section of the basket, hold in place by our thermal transfer adhesives. This design dramatically improves the heat transfer. Further more, based upon a request, we have developed added on aluminum heat-sink. The heat-sink is a recommended optional accessory for applications in sealed mid-range, low volume enclosures.
Voice Coil
At the core of the 6NPM is it’s voice coil technology featuring edge wounded aluminum ribbon wire. Unique lightweight and very short former provides the ideal transfer of power between the voice coil and the cone assembly and assists in reducing the distortion artifacts. By combining this material with the state of the art adhesives, the 6NPM delivers incredible performance.
The neodymium magnet is in a direct contact with the CNC exposed aluminum section of the basket, hold in place by our thermal transfer adhesives. This design dramatically improves the heat transfer. Further more, based upon a request, we have developed added on aluminum heat-sink. The heat-sink is a recommended optional accessory for applications in sealed mid-range, low volume enclosures.
Specifications
General Specs
Nominal Diameter
6.5"
Rated Impedance
8 Ohm
Magnet
Neodymium
Basket Material
Aluminum
Power Handling
AES Power
180 W
Continuous Power
360 W
Peak Power
720 W
Voice Coil
Diameter
44.5 mm
Former
Glass Fiber
Winding Height
6.8 mm
T/S Parameters
Resonant Frequency (Fs)
150.00 Hz
Re
6.90 \u2126
Qes
0.380
Qms
4.58
Qts
0.350
Vas
2.90 liters
Sd
143.10 cm\u00B2
Mms
11.10 grams
Rms
2.28
Cms
0.1000
Bl
13.70 T\u00B7m
Le
0.160 mH
Sensitivity
96.79 dB
Design Details
Surround Material
fabric
Cone/Dome Material
Paper GF
Spider
Nomex
T-Plate
6 mm
Xmax (peak)
0.4 mm
Xmech
6.4 mm
Overall Diameter
162.00 mm
Bolt Circle Diameter
172.00 mm
Baffle Cutout Dia.
145.00 mm
Mounting Holes
4
Depth (flange to rear)
52.50 mm
Net Weight
1.20 kg
Ordering Codes
Product Code
6NPMX8-164
Downloads
Frequency Response & Impedance
2D Drawing
Enclosure Recommendations
The 6NPMX8-164 is designed primarily for use in horn or waveguide configurations that provide controlled pattern loading from 500 Hz upward, and in sealed enclosures within professional multi-way systems where the LF section handles frequencies below the crossover point. In sealed cavities, practical volumes range from 0.6 to 2.0 liters with system resonances between 230 and 360 Hz; these alignments require active high-pass filtering at 300-500 Hz and function as rear-chamber acoustic loading rather than as bass-extending enclosures. Horn loading (constant-directivity waveguide, 90 degrees or narrower) is the preferred implementation for maximum sensitivity, controlled dispersion, and thermal management under high continuous drive levels.
Frequently Asked Questions
- - Very high efficiency midrange
- - Ultra low harmonic distortion
- - High power handling
The 6NPMX8-164 is designed primarily for use in horn or waveguide configurations that provide controlled pattern loading from 500 Hz upward, and in sealed enclosures within professional multi-way systems where the LF section handles frequencies below the crossover point. In sealed cavities, practical volumes range from 0.6 to 2.0 liters with system resonances between 230 and 360 Hz; these alignments require active high-pass filtering at 300-500 Hz and function as rear-chamber acoustic loading rather than as bass-extending enclosures. Horn loading (constant-directivity waveguide, 90 degrees or narrower) is the preferred implementation for maximum sensitivity, controlled dispersion, and thermal management under high continuous drive levels.
Sealed or vented pa mid-woofer, 2-way compact top; weight-critical installs
AES Power: 180 W,
Continuous: 360 W,
Peak: 720 W.
Sensitivity: 96.79 dB (1W/1m).
