LF
Mid-Woofer
8"
81FIND
Code: 81FINDX8-290
Mid-Woofer/8inch/Ferrite/Paper/200W/8ohm
Key Features
- EXTENDED FREQUENCY RESPONSE
- Ideal for small and portable 2-way systems
- Affordable, yet very capable design for cost sensitive product
Quick Specs
Impedance
8 Ω
Program Power
400 W
Sensitivity
94.68 dB
Fs
80.00 Hz
Magnet
Ferrite
Voice Coil
50.8 mm
Design Notes
The 81FIND is a high efficiency, (95 dB 1watt / 1 meter) 8-inch woofer with linear frequency response characteristics, good power handling capability while generating low harmonic distortion artifacts. The 81FIND uses a lightweight glass-fiber loaded cone assembly along with a high excursion M-roll surround. This combination provides a lightweight, yet strong, piston.
Magnetic Circuit
Ferrite based magnetic circuit, capable of delivering the good level of performance, providing a consistent, high integrity magnetic flux gap, low distortion characteristic and high-efficiency cooling system. The metal parts are extensively coated to provide the maximum weather protection.
This driver has been chosen by many audio engineers for smaller sized, or portable audio products. It has proven its capability over and over again all around the world, many times in challenging applications or environments. 81FIND is proven design that delivers good balance between performance and cost.
Magnetic Circuit
Ferrite based magnetic circuit, capable of delivering the good level of performance, providing a consistent, high integrity magnetic flux gap, low distortion characteristic and high-efficiency cooling system. The metal parts are extensively coated to provide the maximum weather protection.
This driver has been chosen by many audio engineers for smaller sized, or portable audio products. It has proven its capability over and over again all around the world, many times in challenging applications or environments. 81FIND is proven design that delivers good balance between performance and cost.
Specifications
General Specs
Nominal Diameter
8"
Rated Impedance
8 Ohm
Magnet
Ferrite
Basket Material
Steel
Power Handling
AES Power
200 W
Continuous Power
400 W
Peak Power
800 W
Voice Coil
Diameter
50.8 mm
Winding Wire
CCAW
Former
Glass Fiber
Winding Height
12.5 mm
T/S Parameters
Resonant Frequency (Fs)
80.00 Hz
Re
4.70 \u2126
Qes
0.530
Qms
8.35
Qts
0.500
Vas
11.30 liters
Sd
213.80 cm\u00B2
Mms
22.60 grams
Rms
1.36
Cms
0.1800
Bl
10.20 T\u00B7m
Le
0.440 mH
Sensitivity
94.68 dB
Design Details
Surround Material
fabric
Cone/Dome Material
Paper GF
Spider
Nomex
T-Plate
8 mm
Xmax (peak)
2.25 mm
Xmech
10.25 mm
Overall Diameter
209.00 mm
Bolt Circle Diameter
197.00 mm
Baffle Cutout Dia.
180.00 mm
Mounting Holes
8
Depth (flange to rear)
91.50 mm
Net Weight
2.80 kg
Ordering Codes
Product Code
81FINDX8-290
Downloads
Frequency Response & Impedance
2D Drawing
Enclosure Recommendations
Recommended enclosure alignments (bass reflex): - 6 liters tuned to 92 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 85 Hz, HP filter 84 Hz - 8 liters tuned to 84 Hz: balanced response, general-purpose (recommended); -3 dB approx. 77 Hz, HP filter 74 Hz - 8 liters tuned to 76 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 65 Hz, HP filter 64 Hz
Frequently Asked Questions
- - EXTENDED FREQUENCY RESPONSE
- - Ideal for small and portable 2-way systems
- - Affordable, yet very capable design for cost sensitive product
Recommended enclosure alignments (bass reflex): - 6 liters tuned to 92 Hz: high output, strong mid-bass, reduced excursion; -3 dB approx. 85 Hz, HP filter 84 Hz - 8 liters tuned to 84 Hz: balanced response, general-purpose (recommended); -3 dB approx. 77 Hz, HP filter 74 Hz - 8 liters tuned to 76 Hz: extended low-frequency, requires HP filter protection; -3 dB approx. 65 Hz, HP filter 64 Hz
Outdoor / weather-resistant; high-efficiency vented pa mid-woofer or bass-mid cabinet
AES Power: 200 W,
Continuous: 400 W,
Peak: 800 W.
Sensitivity: 94.68 dB (1W/1m).
