Scan-Speak
Scan-Speak - 7" Revelator Mid-Woofer - 18W/4531G00
Scan-Speak - 7" Revelator Mid-Woofer - 18W/4531G00
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$354.95
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$354.95
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Stock status is updated regularly from my distributor. If the full quantity ordered isn’t available, I’ll get in touch.
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Description
The Revelator series of woofers has for years been celebrated for reproducing the best sounding dynamic transducers in the world. This driver features a non-resonant cone and dust-cap structure,dynamic linear suspension, SD-1 patented magnet system, “Grasshopper” chassis for maximised airflow, and anti-resonance mounting system. An absolute premium reference level, wide bandwidth driver.
Features
- Patented Symmetrical Drive Motor Design
- Sliced Cone (Controls Cone Breakups)
- Low-Loss linear suspension
- Low Damping SBR Rubber Surround
- Die cast Alu Chassis vented below spider
- Large Ferrite Magnet System
Specifications
Specifications
General
| Driver type | Mid-Woofer |
|---|---|
| Nominal size | 7" |
| Nominal impedance | 4Ω |
| Series | Revelator |
| Power handling (RMS) | 70 W |
| Power handling (program) | 110 W |
| Sensitivity | 90 dB |
| Suggested alignment | Either |
| Frequency range | fs – 7,000 Hz |
Thiele/Small parameters
| Resonant frequency (Fs) | 33 Hz |
|---|---|
| DC resistance (Re) | 3.4 Ω |
| Minimum impedance (Zmin) | 4.2 Ω |
| Voice coil inductance (Le) | 0.3 mH |
| Mechanical Q (Qms) | 5.2 |
| Electrical Q (Qes) | 0.38 |
| Total Q (Qts) | 0.35 |
| Equivalent volume (Vas) | 42 L |
| Compliance (Cms) | 1.33 mm/N |
| Moving mass (Mms) | 17.5 g |
| Mechanical resistance (Rms) | 0.7 kg/s |
| Force factor (Bl) | 5.7 T·m |
| Effective piston area (Sd) | 150 cm² |
| Linear excursion (Xmax, one-way) | 6.5 mm |
| Mechanical excursion (Xmech) | 11 mm |
| Displacement volume (Vd) | 97.5 cm³ |
| Efficiency bandwidth product (EBP) | 86.84 |
| Effective piston diameter (D) | 138 mm |
| Impedance at resonance (Zo) | 49.9 Ω |
Motor
| Voice coil height | 17.5 mm |
|---|---|
| Air gap height | 5 mm |
| Voice coil layers | 2 |
Mounting
| Overall diameter | 182.2 mm |
|---|---|
| Cutout diameter (suggested) | ≈ 157.0 mm |
| Mounting depth | 77.4 mm |
| Flange thickness | 5.6 mm |
| Bolt circle diameter | 169.8 mm |
| Mounting holes | 5 |
| Mounting hole diameter | 5.3 mm |
| Volume displaced by driver | 0.47 L |
| Voice coil diameter | 38 mm |
| Weight | 1.7 kg |
Materials
| Cone | Sliced Paper |
|---|---|
| Surround | SBR |
| Basket | Cast Aluminium |
| Magnet | Ferrite |
Typical box tunings
| Closed box: box volume | 17 L |
|---|---|
| Closed box: corner frequency | 61 Hz |
| Vented box: box volume | 35 L |
| Vented box: box resonance | 36 Hz |
| Vented box: corner frequency | 35 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
- 18W/4531G00 Datasheet
- 18W/4531G00 Drawing
- 18W/4531G00 Adv. Parameters
- 18W/4531G00 3D model
- 18W/4531G00 Cutout & Recess Template (NB Audio) Straight off Scan-Speak's spec sheet: flange outline, recess depth, bolt holes. Scaled from Scan-Speak's drawing, so close but not guaranteed exact: cutout. Check it against your driver before you cut.
Where do these figures come from? See the source of each one
