Description
The SB Acoustics SB29SDAC-C000-4 is a 29 mm (1.1″) fabric dome tweeter, engineered for high-resolution, low-distortion treble, with a larger dome for greater power handling and smoother low-end rolloff. It’s a high-performance textile dome option for builders who want natural highs with the flexibility of lower crossover points.
Features
- Large surround dome for increased acoustic output
- Dual balanced compression chamber for improved dynamics
- Copper cap for reduced voice coil inductance and minimum phase shift
- Saturation controlled motor system for low distortion
- Non-reflective rear chamber with optimized damping for improved dynamics
- Flow optimized vented pole piece for optimum coupling to rear chamber
- CCAW voice coil for low moving mass
- Long life silver lead wires
- Low resonance frequency
- Cast aluminium faceplate
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 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 0.45 g
- Free air resonance, Fs 600 Hz
- Sensitivity (2.83 V / 1 m) 93 dB
- Mechanical Q-factor, Qms 2.94
- Electrical Q-factor, Qes 1.09
- Total Q-factor, Qts 0.8
- Force factor, Bl 2.4 Tm
- Rated power handling* 60 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.
✅ What Makes It Stand Out
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Larger dome (29 mm) = better dispersion at lower frequencies and stronger power handling
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Extremely low Fs (~700 Hz) = excellent for low crossover points, even around 1.5–1.8 kHz
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Smooth, non-fatiguing highs – classic soft dome sound, ideal for long listening
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Rear damping chamber = reduced back-wave reflections and cleaner low-end behavior
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Perfect for 2-way designs with larger midwoofers (6.5–8″)
🛠️ Crossover Tips
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Suggested crossover: 1.5–2.2 kHz
(Ideal with 4th-order filters if going below 2 kHz) -
Excellent matches:
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SB17NRX2C35-4 (6.5″ paper woofer)
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SB23NRXS45-8 (8″ woofer)
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Satori MW19P-4 (7.5″ midwoofer)
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⚖️ Comparison with Other SB Tweeters
| Tweeter | SB29SDAC-C000-4 | SB26STCN-C000-4 | SB29BAC-C000-4 (Be) |
|---|---|---|---|
| Dome Size | 29 mm | 26 mm | 29 mm |
| Dome Material | Fabric | Fabric | Beryllium |
| Fs | ~700–800 Hz | ~1.6 kHz | ~500 Hz |
| Sensitivity | ~91 dB | ~91 dB | ~91 dB |
| Sound | Smooth, rich, neutral | Smooth, compact | Clean, detailed, analytical |
| Crossover Flexibility | Excellent (low Fs) | Moderate | Outstanding |
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