Scan-Speak
Scan-Speak - 7" Discovery Mid-Woofer - 18W/4434G00
Scan-Speak - 7" Discovery Mid-Woofer - 18W/4434G00
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$154.95
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$154.95
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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
Designed for the discerning audiophile customer with Aluminium Chassis, Fibreglass cone, SBR rubber surround, Vented below Spider. The coated fibreglass cone reduces vibration and standing waves and the vented motor system minimises power compression. The combined result is a very open and dynamic sound.
Features
- High Output 91dB @ 2.83V
- Coated NRSC Fibre Glass Cone
- Magnet System w. Alu Ring
- Low Damping SBR Rubber Surround
- Die cast Alu Chassis vented below spider
Specifications
Specifications
General
| Driver type | Mid-Woofer |
|---|---|
| Nominal size | 7" |
| Nominal impedance | 4Ω |
| Series | Discovery |
| Power handling (RMS) | 55 W |
| Power handling (program) | 170 W |
| Sensitivity | 91.3 dB |
| Suggested alignment | Ported |
| Frequency range | fs – 8,000 Hz |
Thiele/Small parameters
| Resonant frequency (Fs) | 47 Hz |
|---|---|
| DC resistance (Re) | 3 Ω |
| Minimum impedance (Zmin) | 3.9 Ω |
| Voice coil inductance (Le) | 0.39 mH |
| Mechanical Q (Qms) | 7.81 |
| Electrical Q (Qes) | 0.37 |
| Total Q (Qts) | 0.35 |
| Equivalent volume (Vas) | 20.7 L |
| Compliance (Cms) | 0.79 mm/N |
| Moving mass (Mms) | 14.41 g |
| Mechanical resistance (Rms) | 0.55 kg/s |
| Force factor (Bl) | 6 T·m |
| Effective piston area (Sd) | 137 cm² |
| Linear excursion (Xmax, one-way) | 4.3 mm |
| Mechanical excursion (Xmech) | 8 mm |
| Displacement volume (Vd) | 58.91 cm³ |
| Efficiency bandwidth product (EBP) | 127 |
| Effective piston diameter (D) | 132 mm |
| Impedance at resonance (Zo) | 66.3 Ω |
Motor
| Voice coil height | 13.6 mm |
|---|---|
| Air gap height | 5 mm |
| Voice coil layers | 2 |
Mounting
| Overall diameter | 179.2 mm |
|---|---|
| Cutout diameter (suggested) | ≈ 145.3 mm |
| Mounting depth | 73.15 mm |
| Flange thickness | 5.2 mm |
| Bolt circle diameter | 167 mm |
| Mounting holes | 6 |
| Mounting hole diameter | 5.3 mm |
| Volume displaced by driver | 0.3 L |
| Voice coil diameter | 32 mm |
| Weight | 1.3 kg |
Materials
| Cone | Coated Fibreglass |
|---|---|
| Surround | SBR |
| Basket | Cast Aluminium |
| Magnet | Ferrite |
Typical box tunings
| Closed box: box volume | 9 L |
|---|---|
| Closed box: corner frequency | 86 Hz |
| Vented box: box volume | 18 L |
| Vented box: box resonance | 49 Hz |
| Vented box: corner frequency | 50 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/4434G00 Datasheet
- 18W/4434G00 Drawing
- 18W/4434G00 Adv. Parameters
- 18W/4434G00 3D model
- 18W/4434G00 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
