- NDK 8-3 WOOFER
Key Features
600 Watt Max power
75 mm (3 in) voice coil, aluminium wire
Demodulating ring for lower distortion
Interleaved sandwich voice coil
Weather protected membrane for outdoor use
Ventilated voice coil and magnet circuit for improved heat dissipation
Neodymium magnet assembly
Air gap height = mm 10 Winding height= mm 22
 General Specifications
|
| Nominal Diameter | 8 in - 200 mm | |
|---|---|---|
| Nominal Impendance | 8 Ohm | |
| Nominal Rdc | 5.6 Ohm | |
| Power handling (AES) (*) | 300 Watt | |
| Max Power | 600 Watt | |
| Minimum Impedance | 7.63 Ohm | |
| Frequency Range | 40 ÷ 2500 Hz | |
| Voice Coil Diameter | 3 in - 75 mm | |
| S.P.L. (1w, 1m) | 92 dB | |
| Nominal Fs | 49 Hz | |
| Flux Density | 1.25 T | |
| Sinusoidal Test Voltage | 15 V |
| Life Test (*) | ||
| Box Volume | 25 liters | |
|---|---|---|
| Input Signal | Pink noise | |
| Band Pass Filter | 50 - 5000Hz, 12 dB/oct | |
| Test duration | 2 hours | |
Diagram
| Frequency Response | Reflex Box (25 liters) - 2.83 V - 1 m | |
|---|---|---|
| Impendance | (Iac=10m A) |
Mechanical & Shipping Informations
| Net weight | 4.4 Kg | |
|---|---|---|
| Overall Diameter | 208 mm | |
| Overall Depth | 127 mm | |
| Baffle Cut Diameter | 183 mm | |
| Mounting holes number | 4 | |
| Mounting holes diameter | 5 mm | |
| Mounting bolt diameter | 194 mm |
Materials
| Frame Material | Aluminium | |
|---|---|---|
| Voice Coil Former Material | Fiberglass | |
| Voice Coil Wire | Aluminium | |
| Cone Material | Doped Paper | |
| Cone Shape | Exponential | |
| Surround Material | Doped Nomex fabric | |
| Surround Shape | Two rolls | |
| Suspension Material | Doped Nomex fabric | |
| Magnet Type | Neodymium | |
| Magnet Weight | 280 g |
Thiele-small parameters
| Qms | 2.82 | |
|---|---|---|
| Qes | 0.33 | |
| Qts | 0.30 | |
| Fs | 48.90 Hz | |
| Re | 5.50 Ohm | |
| Mms | 38.65 g | |
| Cms | 0.27 mm/N | |
| Bl | 14.01 T*m | |
| Sd | 227.00 cm2 | |
| Vas | 19.81 liter | |
| u0 | 0.67 % | |
| XMax | 8.5 mm | |
| Le | 0.57 mH | |
| Rms | 4.21 Kg/s | |
| Efficiency Bandwidth | 146.96 |
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