8" | 81FIND
Ferrite Mid-Woofer
Key features:
- EXTENDED FREQUENCY RESPONSE
- IDEAL FOR SMALL AND PORTABLE 2-WAY SYSTEMS
- AFFORDABLE, YET VERY CAPABLE DESIGN FOR COST SENSITIVE PRODUCT
Design notes:
The 81FHW woofer was designed with smaller hi-fi subwoofers in mind. The woofer works well in vented enclosures or combined with a passive radiator. Optimized magnetic structure delivers good level of performance and balancing well performance vs cost.We have chosen lightweight foam surround in this design. Our extensive development and testing of this material yielded in custom formulation of the raw material we use for the surround and guaranties its long lasting performance.
Specifications:
-
General specs |
Nominal Diameter: |
8 in. |
Rated Impedance: |
8 Ohm |
Power handling |
AES Power: |
200 Watts |
Program Power: |
400 Watts |
Voice Coil |
Diameter: |
2 in. |
Winding wire: |
CCAW |
Former: |
Glass-fiber |
Winding height: |
12.5 mm |
-
T/S Parameters |
Resonant frequency: |
80 Hz |
Re: |
4.7 ohm |
Qes: |
0.53 |
Qms: |
8.35 |
Qts: |
0.5 |
Vas: |
11.3 liters |
Sd: |
213.8 cm2 |
Mms: |
22.6 grams |
Bl: |
10.2 |
Le: |
0.44 mH |
Sensitivity: |
94.68 dB |
-
Design details |
Surround Material: |
Fabric |
Cone material: |
Paper |
Spider: |
Conex |
Plate thickness: |
8 mm |
Peak to peak linear cone Displacement |
6.6 mm |
Overall diameter: |
209 mm |
Bolt circle diameter: |
197 mm |
Baffle cutout dia.: |
180 mm |
Number of mounting holes: |
8 |
Depth (flange to rear): |
91.5 mm |
Net weight: |
2.8 kg |
Ordering codes: |
4 ohm version: |
n/a |
8 ohm version: |
81FINDX8-290 |
16 ohm version: |
81FINDX16-290A |
Recone kits: |
4 ohm version: |
n/a |
8 ohm version: |
RC81FINDX8-290 |
16 ohm version: |
RC81FINDX16-290A |
Frequency response & lmpedance
2D drawing