- NDH 18-3 WOOFER
Key Features
1000 Watt Max Power
75 mm (3 in) voice coil, copper wire
Neodymium magnet assembly
Weather protected membrane for
outdoor use
Air gap height = mm 10 Winding height = mm 18,5
 General
|
| Nominal Diameter | 18" - 450 mm | |
|---|---|---|
| Nominal Impendance | 8,00 Ohm | |
| Nominal Rdc | 5,5 Ohm | ±0,4 Ohm |
| Power handling (AES) (*) | 500 Watt | |
| Max Power | 1000 Watt | |
| Voice Coil Diameter | 75 mm | 3,00 in |
| S.P.L. (1w, 1m) | 99 dB | ±1,5 dB |
| Nominal Fs | 40 Hz | ±5 Hz |
| Flux Density | 1,55 T | ±0,08 T |
| Frequency Range | 30-1000 Hz | |
| Sinusoidal Test Voltage | 20 V |
| Life Test (*) | ||
| Box Volume | 180 liters | |
|---|---|---|
| Input Signal | Pink noise | |
| Band Pass Filter | 20-1000Hz,12dB/oc | |
| V on Speaker | 63 V | |
| Test duration | 2 hours | |
Diagram
| Frequency Response | Reflex Box (180 dmc) - 2,83 V - 1m | |
|---|---|---|
| Impendance | (lac=10m A) |
Mechanical data
| Weight | 6,2 kg | |
|---|---|---|
| Overall Diameter | 460 mm | |
| Overall Depth | 192 mm | |
| Baffle Cut Diameter | 416 mm | |
| Mounting holes number | 8 | |
| Mounting holes diameter | 7 mm | |
| Mounting bolt diameter | 440 mm |
Materials
| Frame Material | Aluminium | |
|---|---|---|
| Voice Coil Former | Kapton | |
| Voice Coil Wire | Copper | |
| Cone Material | Doped Paper | |
| Cone Shape | Exponential | |
| Surround Material | Doped Nomex ® fabric | |
| Surround Shape | Two waves | |
| Suspension Material | Doped Nomex ® fabric | |
| Magnet Type | Neodymium | |
| Magnet Weight | 460 g |
Thiele-small parameters
| Qms | 27,39 | |
|---|---|---|
| Qes | 0,36 | |
| Qts | 0,36 | |
| Fs | 41,70 Hz | |
| Re | 5,61 Ohm | |
| Mms | 159,00 g | |
| Cms | 0,09 mm/N | |
| Bl | 25,39 T*m | |
| Sd | 1164,00 cm2 | |
| Vas | 174,15 liter | |
| u0 | 3,36 % | |
| XMax | 6,75 mm | |
| Le | 0,85 mH | |
| Rms | 1,52 Kg/s | |
| Efficiency Bandwidth | 115,03 |
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