Scanspeak 18WU/4741T00 Illuminator 18cm 4 Ohm Bass / Midrange.
This Illuminator 18cm 4 Ohm midwoofer is a highly advanced unit featuring some very forward thinking technology. The unique alloy chassis is open and has been optimised for maximum airflow with minimum reflection / sound disturbance; the underhung Neodymium magnet is outrigged from the chassis and the spider is completely open on both sides - these advancements give excellent sound characteristics with no compression. All of the Illuminator midwoofers have a prodigious, deep bass response.
Featuring a unique patented long fibre cone, copper capped pole piece & huge linear excursion, this audiophile drive unit is at the very pinnacle of sound quality and design.
Available in 4 and 8 Ohm impedance.
Key Features:
- Under-Hung Neodymium Motor Design
- Patented Sandwich Paper Cone
- Low-loss linear suspension
- Patented Symmetrical Drive (SD-3)
- Exceptionally Long Linear Excursion
This woofer is 4 Ohms ; the 8 Ohm version is here : 18WU/8741T00
Basic parameters:
| Resonant frequency (fs) |
30 Hz |
Nominal impedance (Zn) |
4 Ω |
| Mechanical Q factor (Qms) |
3.56 |
DC resistance (Re) |
3.2 Ω |
| Electrical Q factor (Qes) |
0.32 |
RMS power handling |
80 W |
| Total Q factor (Qts) |
0.29 |
Sensitivity (2.83V/1m) |
87.2 dB |
| Equivalent volume (Vas) |
49.4L |
Chassis diameter |
184 mm |
Here's the full datasheet:
