SB Audience
SB Audience - 21" NERO Subwoofer - NERO-21SW1100D
SB Audience - 21" NERO Subwoofer - NERO-21SW1100D
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$674.95
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$674.95
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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
Features
- Proprietary paper cone with silk cotton tree
- Double spider high stability suspension
- Cooling device on yoke for improved heat transfer
- 5" voice coil with APC (Advanced Polymer Coating)
- Shorting ring in motor system for reduced distortion
- Cast aluminium chassis
- Minimum damping fibre glass voice coil former
Specifications
Specifications
General
| Driver type | Subwoofer |
|---|---|
| Nominal size | 21" |
| Nominal impedance | 8Ω |
| Series | SB Pro-subwoofers |
| Power handling (RMS) | 1,100 W |
| Power handling (program) | 2,200 W |
| Sensitivity | 102 dB |
| Frequency range | 32 – 2,600 Hz |
| Suggested alignment | Either |
| Cone surround | Triple roll |
| Spider profile | Double constant height waves |
| Weather resistant | Yes |
| Recone kit | 1P000OPSB028 |
Thiele/Small parameters
| Resonant frequency (Fs) | 32 Hz |
|---|---|
| DC resistance (Re) | 5.1 Ω |
| Minimum impedance (Zmin) | 5 Ω |
| Voice coil inductance (Le) | 1.29 mH |
| Mechanical Q (Qms) | 10.98 |
| Electrical Q (Qes) | 0.35 |
| Total Q (Qts) | 0.34 |
| Equivalent volume (Vas) | 313 L |
| Compliance (Cms) | 0.08 mm/N |
| Moving mass (Mms) | 309.3 g |
| Mechanical resistance (Rms) | 5.67 kg/s |
| Force factor (Bl) | 30 T·m |
| Effective piston area (Sd) | 1,655 cm² |
| Linear excursion (Xmax, one-way) | 12.2 mm |
| Mechanical excursion (Xmech) | 19 mm |
| Displacement volume (Vd) | 2,019 cm³ |
| Efficiency bandwidth product (EBP) | 91.43 |
| Reference efficiency (η0) | 2.79 % |
Motor
| Voice coil height | 28.2 mm |
|---|---|
| Air gap height | 12 mm |
| Magnetic flux density | 1.12 T |
| Voice coil wire | AISV Copper Wire |
| Demodulation | Aluminium shorting ring and Aluminium cooling device |
Mounting
| Overall diameter | 540 mm |
|---|---|
| Cutout diameter | 490 mm |
| Mounting depth | 233.2 mm |
| Flange thickness (estimate) | ≈ 10.0 mm |
| Bolt circle diameter | 518 mm |
| Mounting holes | 8 |
| Mounting hole diameter | 6.5 mm |
| Volume displaced by driver | 13.37 L |
| Voice coil diameter | 127 mm |
| Weight | 21 kg |
| Flange and gasket thickness | 15.5 mm |
Materials
| Cone | Paper |
|---|---|
| Voice coil former | Fibreglass |
| Basket | Cast Aluminium |
| Magnet | Ferrite |
- Xmax is quoted one-way (peak), not peak-to-peak.
- Sensitivity measured at 1W/1m.
- Power handling (RMS) is the AES rating: 2 hours of pink noise (6 dB crest factor), Fs to 10 × Fs, in free air, on the nominal impedance. Program power is SB Audience's maximum power, 3 dB above the RMS rating.
Downloads
- NERO-21SW1100D Datasheet
- NERO-21SW1100D Drawing
- NERO-21SW1100D Cutout & Recess Template (NB Audio) Every figure is straight off SB Audience's own spec sheet. Check it against your driver before you cut.
Where do these figures come from? See the source of each one
