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Scan-Speak
Scan-Speak - 7" Illuminator Woofer - 18WU/4747T00
Scan-Speak - 7" Illuminator Woofer - 18WU/4747T00
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$584.95 AUD
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Description
An 18 cm (7") woofer from Scan-Speak's Illuminator range, with a black anodised aluminium cone, an open construction and a low-loss linear suspension. Its patented under-hung SD-3 (Symmetrical Drive) neodymium motor uses copper caps to keep distortion very low and gives a very long linear excursion.
Features
- Under-Hung Neodymium Motor Design
- Patented Symmetrical Drive (SD-3)
- Black Anodised Alu. Cone
- Exceptionally Long Linear Excursion
- Low-Loss linear suspension
- Patented Design
Specifications
Specifications
General
| Driver type | Woofer |
|---|---|
| Nominal size | 7" |
| Nominal impedance | 4Ω |
| Series | Illuminator |
| Power handling (RMS) | 70 W |
| Power handling (program) | 150 W |
| Sensitivity | 87.5 dB |
| Frequency range | fs – 4,000 Hz |
Thiele/Small parameters
| Resonant frequency (Fs) | 36 Hz |
|---|---|
| DC resistance (Re) | 3.3 Ω |
| Minimum impedance (Zmin) | 4.5 Ω |
| Voice coil inductance (Le) | 0.4 mH |
| Mechanical Q (Qms) | 3.72 |
| Electrical Q (Qes) | 0.39 |
| Total Q (Qts) | 0.35 |
| Equivalent volume (Vas) | 36 L |
| Compliance (Cms) | 1.1 mm/N |
| Moving mass (Mms) | 18.1 g |
| Mechanical resistance (Rms) | 1.1 kg/s |
| Force factor (Bl) | 5.9 T·m |
| Effective piston area (Sd) | 154 cm² |
| Linear excursion (Xmax, one-way) | 9 mm |
| Mechanical excursion (Xmech) | 16 mm |
| Displacement volume (Vd) | 138.6 cm³ |
| Efficiency bandwidth product (EBP) | 92.31 |
| Effective piston diameter (D) | 140 mm |
| Impedance at resonance (Zo) | 32.6 Ω |
Motor
| Voice coil height | 8 mm |
|---|---|
| Air gap height | 20 mm |
| Voice coil layers | 4 |
Mounting
| Volume displaced by driver | 0.45 L |
|---|---|
| Voice coil diameter | 42 mm |
| Weight | 1.7 kg |
Materials
| Cone | Aluminium |
|---|---|
| Magnet | Neodymium |
Typical box tunings
| Closed box: box volume | 15 L |
|---|---|
| Closed box: corner frequency | 67 Hz |
| Vented box: box volume | 30 L |
| Vented box: box resonance | 38 Hz |
| Vented box: corner frequency | 39 Hz |
- Xmax is quoted one-way (peak), not peak-to-peak.
- Sensitivity measured at 2.83V/1m.
- Power handling (RMS) is Scan-Speak's 100-hour RMS noise test (IEC 18.4); program power is its long-term maximum power (IEC 18.2).
Downloads
- Datasheet PDF, 339 KB
- Drawing PNG, 254 KB
- Adv. Parameters PDF, 45 KB
- 3D model 3D CAD, ZIP, 3.6 MB
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