Description
The SB Acoustics SB29BNC-C000-4 is a 29 mm beryllium dome tweeter with a neodymium magnet system and a compact faceplate, making it a high-end performer in a smaller form factor. It’s designed for systems where space is tight but no compromise in sound quality is acceptable.
Features
- Beryllium dome for non-resonant high frequency extension
- Copper cap on pole piece for reduced voice coil inductance and minimum phase shift
- CCAW voice coil for low moving mass
- Internal pressure equalization and flow resistor for non-resonant coupling of cavities
- Long life flexible lead wires
- Inherently shielded neodymium motor system
- Compact design
- Low resonance frequency
Specs
- Nominal Impedance 4 Ω
- DC resistance, Re 3.0 Ω
- Voice coil inductance, Le 0.05 mH
- Effective piston area, Sd 9.6 cm2
- Voice coil diameter 29.0 mm
- Voice coil height 2.0 mm
- Air gap height 2.5 mm
- Linear coil travel (p-p) 0.5 mm
- Moving mass incl. air, Mms 0.46 g
- Free air resonance, Fs 950 Hz
- Sensitivity (2.83V/1m) 95 dB
- Mechanical Q-factor, Qms 1.36
- Electrical Q-factor, Qes 1.40
- Total Q-factor, Qts 0.69
- Force factor, Bl 2.6 Tm
- Rated power handling* 80 W
- Magnetic flux density 1.2 T
- Magnet weight 31 g
- Net weight 0.17 kg
* IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct
✅ What Sets It Apart
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Beryllium dome = extremely stiff, ultra-light → gives you fast, detailed, distortion-free treble.
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Compact design (72 mm faceplate) = perfect for tight baffle layouts, MTM, or bookshelf speakers where space is limited.
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Neodymium motor = smaller size without sacrificing magnetic strength or linearity.
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Rear acoustic chamber = helps control Fs and enables low crossover points.
🛠️ Crossover Suggestions
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Recommended crossover point: 1.8–2.5 kHz
(can go lower with 4th-order filters) -
Excellent match with:
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SB15NBAC30-4, SB17CRC35-4, Satori MW16TX-4
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Any high-quality midwoofer where you want a clean, high-resolution top end
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⚖️ SB29BNC vs SB29BAC vs Satori TW29BN-B
| Feature | SB29BNC-C000-4 | SB29BAC-C000-4 | Satori TW29BN-B |
|---|---|---|---|
| Dome Material | Beryllium | Beryllium | Beryllium |
| Magnet Type | Neodymium | Ferrite | Neodymium |
| Faceplate Size | 72 mm (compact) | 104 mm | 104 mm |
| Fs | ~500–600 Hz | ~500–600 Hz | ~500 Hz |
| Sound Signature | Clean, airy, compact | Clean, spacious | Ultra-refined, expansive |
| Best For | Tight layouts, MTMs | Full-size systems | High-end reference builds |
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