ScanSpeak Illuminator 18WU/4741T00 7" Midwoofer
Speaker Drivers · SKU: 18WU/4741T00 · Brand ScanSpeak
฿15,800 (incl. VAT) · In stock
ScanSpeak Illuminator 18WU/4741T00 7" Midwoofer specifications
| Diameter Cone diameter — larger cones move more air and reach deeper bass | 7" |
|---|---|
| Impedance Voice-coil electrical resistance — must match your amplifier (e.g. 4Ω/8Ω) | 4 Ω |
| Power (RMS) Continuous power the driver handles safely (RMS) — not peak power | 70 W |
| Sensitivity (SPL) Sensitivity — loudness at 1W/1m; higher means louder with less amplifier power | 87.5 dB |
| Fs Free-air resonance frequency — lower generally means deeper bass extension | 34 Hz |
| Qts Total Q at resonance (electrical + mechanical) — guides the sealed vs ported choice | 0.36 |
| Qes Electrical Q at resonance — comes from the magnet motor strength | 0.39 |
| Qms Mechanical Q at resonance — from damping of the surround and spider | 3.76 |
| Vas Equivalent air volume of the suspension compliance — used to size the enclosure | 38.4 L |
| Sd Effective cone area that actually moves air | 154 cm² |
| Xmax Maximum linear excursion — more travel means louder bass without distortion | 9 mm |
| Re DC resistance of the voice coil | 3.3 Ω |
| Le Voice-coil inductance — affects high-frequency response | 0.4 mH |
| Mms Total moving mass, including the air load | 19.1 g |
| BL Motor force factor (magnetic flux × coil length) — higher means tighter cone control | 5.9 T·m |
| Weight Driver weight | 1700 g |
ScanSpeak Illuminator 18WU/4741T00 7" Midwoofer datasheet (PDF)