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Scan-Speak
Scan-Speak - 11" Revelator Subwoofer - 28W/4878T00
Scan-Speak - 11" Revelator Subwoofer - 28W/4878T00
Regular price
$989.95 AUD
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$989.95 AUD
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Description
28 cm Subwoofer, 4 ohm, Sandwich Paper Cone, Ferrite Magnet
The 28W/4878T00 is a very powerful 28cm subwoofer, with its large 3” voice coil, extreme linear excursion and low resonance frequency, it is perfect to reproduce the deepest frequencies. It features a paper-sandwich cone with very high stiffness and relatively low weight. The motor system has heavy duty copper sleeves for optimising eddy currents and minimising self-induction.
Features
- Paper sandwich cone
- Patented Symmetrical Drive motor
- Spider with balanced tinsel leads
- Extreme linear excursion (+/-14 mm)
- 3" Voice coil, Titanium former and paper reinforced
- Stiff and strong die cast aluminium chassis
Specifications
Specifications
General
| Driver type | Subwoofer |
|---|---|
| Nominal size | 11" |
| Nominal impedance | 4Ω |
| Series | Revelator |
| Power handling (RMS) | 200 W |
| Power handling (program) | 500 W |
| Sensitivity | 88.2 dB |
| Suggested alignment | Either |
| Frequency range | fs – 1,000 Hz |
| Recommended crossover | 2. order LP Butterworth, 200 Hz |
Thiele/Small parameters
| Resonant frequency (Fs) | 18 Hz |
|---|---|
| DC resistance (Re) | 3.1 Ω |
| Minimum impedance (Zmin) | 3.8 Ω |
| Voice coil inductance (Le) | 0.5 mH |
| Mechanical Q (Qms) | 5.6 |
| Electrical Q (Qes) | 0.32 |
| Total Q (Qts) | 0.3 |
| Equivalent volume (Vas) | 127 L |
| Compliance (Cms) | 0.68 mm/N |
| Moving mass (Mms) | 115 g |
| Mechanical resistance (Rms) | 2.3 kg/s |
| Force factor (Bl) | 11.2 T·m |
| Effective piston area (Sd) | 363 cm² |
| Linear excursion (Xmax, one-way) | 14 mm |
| Mechanical excursion (Xmech) | 26 mm |
| Displacement volume (Vd) | 508.2 cm³ |
| Efficiency bandwidth product (EBP) | 56.25 |
| Effective piston diameter (D) | 215 mm |
| Impedance at resonance (Zo) | 53 Ω |
Motor
| Voice coil height | 36 mm |
|---|---|
| Air gap height | 8 mm |
| Voice coil layers | 2 |
Mounting
| Overall diameter | 279.9 mm |
|---|---|
| Mounting depth | 139.6 mm |
| Bolt circle diameter | 265 mm |
| Mounting holes | 7 |
| Mounting hole diameter | 6.3 mm |
| 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 | 35 L |
|---|---|
| Closed box: corner frequency | 39 Hz |
| Vented box: box volume | 65 L |
| Vented box: box resonance | 23 Hz |
| Vented box: corner frequency | 24 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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