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Scan-Speak
Scan-Speak - 11" Revelator Woofer - 28W/4878T01
Scan-Speak - 11" Revelator Woofer - 28W/4878T01
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$984.95 AUD
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Description
A 28 cm (11") woofer from Scan-Speak's Revelator range, with a large 3" voice coil, long linear excursion and a low resonance frequency for the deepest bass. Its paper-sandwich cone is very stiff for its weight, and the patented Symmetrical Drive motor has heavy-duty copper sleeves to control eddy currents and self-induction.
Features
- Paper Sandwich cone
- Patented Symmetrical Drive motor
- Spider with balanced tinsel leads
- Long linear excursion
- 3" Voice coil, Titanium former, paper reinforced
- Stiff and strong die cast aluminium chassis
Specifications
Specifications
General
| Driver type | Woofer |
|---|---|
| Nominal size | 11" |
| Nominal impedance | 4Ω |
| Series | Revelator |
| Power handling (RMS) | 200 W |
| Power handling (program) | 500 W |
| Sensitivity | 91 dB |
| Frequency range | fs – 1,000 Hz |
| Recommended crossover | 2. order LP Butterworth, 200 Hz |
Thiele/Small parameters
| Resonant frequency (Fs) | 23 Hz |
|---|---|
| DC resistance (Re) | 3.1 Ω |
| Minimum impedance (Zmin) | 4 Ω |
| Voice coil inductance (Le) | 0.5 mH |
| Mechanical Q (Qms) | 6.21 |
| Electrical Q (Qes) | 0.27 |
| Total Q (Qts) | 0.26 |
| Equivalent volume (Vas) | 104 L |
| Compliance (Cms) | 0.56 mm/N |
| Moving mass (Mms) | 86 g |
| Mechanical resistance (Rms) | 2 kg/s |
| Force factor (Bl) | 12 T·m |
| Effective piston area (Sd) | 363 cm² |
| Linear excursion (Xmax, one-way) | 7 mm |
| Mechanical excursion (Xmech) | 28 mm |
| Displacement volume (Vd) | 254.1 cm³ |
| Efficiency bandwidth product (EBP) | 85.19 |
| Effective piston diameter (D) | 215 mm |
| Impedance at resonance (Zo) | 75 Ω |
Motor
| Voice coil height | 22 mm |
|---|---|
| Air gap height | 8 mm |
| Voice coil layers | 2 |
Mounting
| Volume displaced by driver | 2.23 L |
|---|---|
| Voice coil diameter | 75 mm |
| Weight | 7.5 kg |
Materials
| Cone | Sandwich Paper |
|---|---|
| Magnet | Ferrite |
Typical box tunings
| Closed box: box volume | 20 L |
|---|---|
| Closed box: corner frequency | 57 Hz |
| Vented box: box volume | 33 L |
| Vented box: box resonance | 33 Hz |
| Vented box: corner frequency | 38 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).
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