8" | 82FHM
Ferrite Mid-Woofer
Key features:
- EXTENDED FREQUENCY RESPONSE
- HARD ANODIZED ALUMINUM CONE WITH RUBBER SURROUND
- ALUMINUM BASKET
Design notes:
The 81FIND is a high efficiency,(96 dB 1watt / 1 meter) 8-inch woofer withlinear frequency response characteristics,good power handling capability while generating low harmonic distortion artifacts.The 81FIND uses a lightweight glass-fiberloaded cone assembly along with a highexcursion M-roll surround. This combination provides a lightweight, yet strong,piston.Magnetic CircuitFerrite based magnetic circuit, capable ofdelivering the good level of performance,providing a consistent, high integrity magnetic flux gap, low distortion characteristicand high-efficiency cooling system. Themetal parts are extensively coated to provide the maximum weather protection.This driver has been chosen by many audioengineers for smaller sized, or portableaudio products. It has proven its capabilityover and over again all around the world,many times in challenging applications orenvironments. 81FIND is proven designthat delivers good balance between performance and cost.
Specifications:
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General specs |
Nominal Diameter: |
8 in. |
Rated Impedance: |
8 Ohm |
Power handling |
AES Power: |
60 Watts |
Program Power: |
120 Watts |
Voice Coil |
Diameter: |
1.5 in. |
Winding wire: |
Copper |
Former: |
Aluminum |
Winding height: |
15.9 mm |
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T/S Parameters |
Resonant frequency: |
42 Hz |
Re: |
5.7 ohm |
Qes: |
0.76 |
Qms: |
3.1 |
Qts: |
0.61 |
Vas: |
33.6 liters |
Sd: |
213.8 cm2 |
Mms: |
28.3 grams |
Bl: |
7.56 |
Le: |
0.47 mH |
Sensitivity: |
88.31 dB |
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Design details |
Surround Material: |
Rubber |
Cone material: |
Aluminum |
Spider: |
Nomex |
Plate thickness: |
5 mm |
Peak to peak linear cone Displacement |
8.4 mm |
Overall diameter: |
223.5 mm |
Bolt circle diameter: |
210 mm |
Baffle cutout dia.: |
189 mm |
Number of mounting holes: |
6 |
Depth (flange to rear): |
87.5 mm |
Net weight: |
1.9 kg |
Ordering codes: |
4 ohm version: |
82FHMX4-445B |
8 ohm version: |
82FHMX8-445A |
16 ohm version: |
n/a |
Recone kits: |
4 ohm version: |
RC82FHMX4-445B |
8 ohm version: |
RC82FHMX8-445A |
16 ohm version: |
n/a |
Frequency response & lmpedance
2D drawing