Description
The SB Acoustics SB29BAC-C000-4 is a 29 mm beryllium dome tweeter, positioned as a high-end performer just below the flagship Satori TW29BN line. It delivers ultra-high-resolution treble, excellent transient response, and superb off-axis performance, making it ideal for reference-grade 2- or 3-way systems.
Features
- Beryllium dome for non-resonant high frequency extension
- Large surround dome for increased acoustic output
- Copper cap for reduced voice coil inductance and minimum phase shift
- Saturation controlled motor system for low distortion
- Dual balanced compression chambers for improved dynamics
- Flow optimized vented pole piece for optimum coupling to rear chamber
- Non-reflective rear chamber with optimized damping for improved dynamics
- CCAW voice coil for low moving mass
- Long life flexible lead wires
- Cast aluminium faceplate
- 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 650 Hz
- Sensitivity (2.83V/1m) 93 dB
- Mechanical Q-factor, Qms 2.71
- Electrical Q-factor, Qes 1.22
- Total Q-factor, Qts 0.84
- Force factor, Bl 2.4 Tm
- Rated power handling* 80 W
- Magnetic flux density 1.1 T
- Magnet weight 0.22 kg
- Net weight 0.5 kg
* IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct
🔍 Why Beryllium?
Beryllium is a premium dome material prized for:
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Extreme rigidity (no dome breakup in the audible band)
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Very low mass (light = fast response)
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Neutrality – no coloration or “dome flavor”
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Transparency – exposes micro-detail with surgical precision
SB Acoustics’ implementation ensures the treble is clean but not clinical, with refined musicality.
✅ Performance Highlights
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Extremely low Fs (~500 Hz) – gives huge crossover flexibility, even as low as 1.5–1.8 kHz
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Incredibly detailed treble – unveils texture, air, and space without harshness
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Low distortion, even at high SPLs – thanks to the dome, damping, and motor design
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Smooth off-axis behavior – wide soundstage with natural imaging
🛠️ Crossover Tips
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Safe crossover: 1.8–2.5 kHz (2 kHz sweet spot)
4th-order slopes recommended for lower points -
Excellent match for:
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Satori MW16P / MW19P (paper cone)
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SB17NBAC35-4 (aluminum cone)
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SB15CRC30-4 (ceramic cone)
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High-end 2-way monitors or towers
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⚖️ SB29BAC vs Other High-End Domes
| Tweeter | SB29BAC-C000-4 | Satori TW29BN-B | SB26CDC-C000-4 |
|---|---|---|---|
| Dome Material | Beryllium (29 mm) | Beryllium (29 mm) | Ceramic-coated aluminum |
| Fs | ~500–600 Hz | ~500 Hz | ~1.5 kHz |
| Sensitivity | ~91 dB | ~91 dB | ~91 dB |
| Rear Chamber | Yes | Yes | No |
| Sound | Clean, detailed, airy | Hyper-refined, ultra-neutral | Refined, smooth |
Reviews
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