- NDK 12-3 WOOFER
Key Features
1000 Watt Max power
75 mm (3 in) voice coil, copper 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 | 12 in - 320 mm | |
|---|---|---|
| Nominal Impendance | 8 Ohm | |
| Nominal Rdc | 5.6 Ohm | |
| Power handling (AES) (*) | 500 Watt | |
| Max Power | 1000 Watt | |
| Minimum Impedance | 6.86 Ohm | |
| Frequency Range | 50 ÷ 3000 Hz | |
| Voice Coil Diameter | 3 in - 75 mm | |
| S.P.L. (1w, 1m) | 98 dB | |
| Nominal Fs | 55 Hz | |
| Flux Density | 1.45 T | |
| Sinusoidal Test Voltage | 15 V |
| Life Test (*) | ||
| Box Volume | 60 liters | |
|---|---|---|
| Input Signal | Pink noise | |
| Band Pass Filter | 50 - 2000Hz, 12 dB/oct | |
| Test duration | 2 hours | |
Diagram
| Frequency Response | Reflex Box (80 liters) - 2.83 V - 1 m | |
|---|---|---|
| Impendance | (Iac=10m A) |
Mechanical & Shipping Informations
| Net weight | 5.2 Kg | |
|---|---|---|
| Overall Diameter | 315 mm | |
| Overall Depth | 155 mm | |
| Baffle Cut Diameter | 282 mm | |
| Mounting holes number | 8 | |
| Mounting holes diameter | 7 mm | |
| Mounting bolt diameter | 295 mm |
Materials
| Frame Material | Aluminium | |
|---|---|---|
| Voice Coil Former Material | Fiberglass | |
| Voice Coil Wire | Copper | |
| Cone Material | Doped Paper | |
| Cone Shape | Exponential | |
| Surround Material | Doped Nomex fabric | |
| Surround Shape | Three waves | |
| Suspension Material | Doped Nomex fabric | |
| Magnet Type | Neodymium | |
| Magnet Weight | 510 g |
Thiele-small parameters
| Qms | 7.07 | |
|---|---|---|
| Qes | 0.34 | |
| Qts | 0.33 | |
| Fs | 53.90 Hz | |
| Re | 5.54 Ohm | |
| Mms | 63.81 g | |
| Cms | 0.14 mm/N | |
| Bl | 18.68 T*m | |
| Sd | 535.00 cm2 | |
| Vas | 54.87 liter | |
| u0 | 2.41 % | |
| XMax | 8.5 mm | |
| Le | 0.4 mH | |
| Rms | 3.06 Kg/s | |
| Efficiency Bandwidth | 157.00 |
Download
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