← Back to SB Audience - 18" BIANCO Subwoofer - BIANCO-18SW500
Where the figures for BIANCO-18SW500 come from
I take every figure from SB Audience's own product page or datasheet where I can. This lists where each figure on the BIANCO-18SW500 page came from.
- 1 from SB Audience's product page
- 42 from SB Audience's datasheet
- 2 worked out from SB Audience's figures
- 1 my estimate
- 4 from NB Audio's listing
General
| Driver type | Subwoofer | NB Audio's listing |
|---|---|---|
| Nominal size | 18" | NB Audio's listing |
| Nominal impedance | 8Ω | Maker's datasheet |
| Series | SB Pro-subwoofers | NB Audio's listing |
| Power handling (RMS) | 500 W | Maker's datasheet |
| Power handling (program) | 1,000 W | Maker's datasheet |
| Sensitivity | 98 dB | Maker's datasheet |
| Frequency range | 30 – 3,100 Hz | Maker's datasheet |
| Suggested alignment | Either | NB Audio's listing |
| Cone surround | Double half roll | Maker's datasheet |
| Spider profile | Single constant height waves | Maker's datasheet |
| Weather resistant | Yes | Maker's datasheet |
| Recone kit | 1P000OPSB021 | Maker's datasheet |
Thiele/Small parameters
| Resonant frequency (Fs) | 30 Hz | Maker's datasheet |
|---|---|---|
| DC resistance (Re) | 5.7 Ω | Maker's datasheet |
| Minimum impedance (Zmin) | 5.6 Ω | Maker's datasheet |
| Voice coil inductance (Le) | 1.64 mH | Maker's datasheet |
| Mechanical Q (Qms) | 19.04 | Maker's datasheet |
| Electrical Q (Qes) | 0.53 | Maker's datasheet |
| Total Q (Qts) | 0.52 | Maker's datasheet |
| Equivalent volume (Vas) | 334.8 L | Maker's datasheet |
| Compliance (Cms) | 0.15 mm/N | Maker's datasheet |
| Moving mass (Mms) | 195.2 g | Maker's datasheet |
| Mechanical resistance (Rms) | 1.92 kg/s | Maker's datasheet |
| Force factor (Bl) | 19.8 T·m | Maker's datasheet |
| Effective piston area (Sd) | 1,269 cm² | Maker's datasheet |
| Linear excursion (Xmax, one-way) | 9.21 mm | Maker's datasheet |
| Mechanical excursion (Xmech) | 16 mm | Maker's datasheet |
| Displacement volume (Vd) | 1,169 cm³ | Worked out from the maker's figures |
| Efficiency bandwidth product (EBP) | 56.6 | Worked out from the maker's figures |
| Reference efficiency (η0) | 1.6 % | Maker's datasheet |
Motor
| Voice coil height | 21.75 mm | Maker's datasheet |
|---|---|---|
| Air gap height | 10 mm | Maker's datasheet |
| Magnetic flux density | 1 T | Maker's datasheet |
| Voice coil wire | Copper | Maker's datasheet |
Mounting
| Overall diameter | 465 mm | Maker's datasheet |
|---|---|---|
| Cutout diameter | 422 mm | Maker's datasheet |
| Mounting depth | 174 mm | Maker's datasheet |
| Flange thickness (estimate) | ≈ 13.6 mm | My estimate, from the maker's drawing |
| Bolt circle diameter | 445 mm | Maker's datasheet |
| Mounting holes | 8 | Maker's datasheet |
| Mounting hole diameter | 8 mm | Maker's datasheet |
| Volume displaced by driver | 7.62 L | Maker's datasheet |
| Voice coil diameter | 99.2 mm | Maker's datasheet |
| Weight | 10.28 kg | Maker's datasheet |
| Flange and gasket thickness | 18.2 mm | Maker's datasheet |
Materials
| Cone | Coated Paper | Maker's product page |
|---|---|---|
| Voice coil former | Fibreglass | Maker's datasheet |
| Basket | Cast Aluminium | Maker's datasheet |
| Magnet | Ferrite | Maker's datasheet |
What the labels mean
- Maker's product page: copied from the maker's product page.
- Maker's datasheet: read off the maker's own datasheet or drawing.
- Worked out from the maker's figures: Vd = Sd × Xmax, EBP = Fs ÷ Qes.
- My estimate, from the maker's drawing: measured off the maker's drawing, usually within ±0.3 mm (up to ±0.5). Measure before you cut.
- NB Audio's listing: how I've filed it in the store.
Check them yourself: Datasheet