M1840 - LF Drivers
Product description:
Low frequency transducer for bass reflex and band pass system.
Main features:
- aluminum die-cast frame;
- removable self-centering ferrite magnet system;
- inside-outside copper voice coil;
- ventilated voice coil gap;
- double silicon spider.
Product specification:
- 18” nominal diameter;
- 900 W AES program power;
- 98 dB 1W/1m sensitivity;
- 3” copper voice coil;
- 9.3 kg weight.
| Specifications | |
|---|---|
| Nominal diameter, inches (mm) | 18(460) |
| Nominal impedance, Ohm | 8/4 |
| Rated power (AES), W | 450 |
| Frequency range, Hz | 40-2000 |
| Sensitivity (1W / 1m), dB | 97 |
| Minimum impedance, Ohm | 6,9@150Hz |
| Bl product, Tm | 24,3 |
| Voice coil inductance, mH (1kHz) | 2,2 |
| Moving mass Mms, g | 198 |
| Voice coil | |
| Diameter, inches (mm) | 3(76) |
| Winding material | copper |
| Former material | glass fiber |
| Winding depth, mm | 18 |
| Magnetic system | |
| Magnetic gap depth, mm | 10 |
| Flux density, T | 1,18 |
| Thiele-Small parameters | |
| Fs, Hz | 32,8 |
| Vas, l | 223 |
| Qts | 0,38 |
| Qes | 0,39 |
| Qms | 13,2 |
| Re, Оhm | 5,7 |
| Sd, сm2 | 1164 |
| Xmax, mm | 6,5 |
| n, % | 2 |
| Mounting information | |
| Overall diameter, mm | 456 |
| Baffle cutout diameter, mm | 420 |
| Bolt hole diameter, mm | 7 |
| Bolt circle diameter, mm | 440 |
| Height, mm | 205 |
| Net weight, kg | 9,3 |
