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
- CCAW voice coil for low moving mass
- Long life silver lead wires
- Low resonance frequency
- Copper cap on pole piece for reduced voice coil inductance and minimum phase shift
- Inherently shielded neodymium motor system
- Internal pressure equalization and flow resistor for non-resonant coupling of cavities
- Compact design
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 630 Hz
- Sensitivity (2.83 V / 1 m) 95.5 dB
- Mechanical Q-factor, Qms 1.3
- Electrical Q-factor, Qes 0.79
- Total Q-factor, Qts 0.49
- 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.
✅ Why It’s Excellent
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Large soft dome (29 mm) = stronger output at lower treble frequencies and smoother integration with large woofers.
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Very low Fs (~700 Hz) = allows low crossover points, even around 1.5–1.8 kHz.
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Compact design (72 mm faceplate) = ideal for MTM layouts, narrow cabinets, or nearfield monitors.
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Smooth, natural sound – signature textile dome character with minimal coloration.
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Excellent for both active and passive systems where crossover design flexibility is needed.
🛠️ Crossover Suggestions
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Recommended Crossover Point: 1.5–2.2 kHz
(12–18 dB/oct is safe; 24 dB/oct for ultra-low crossover points) -
Great matches:
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SB15NBAC30-4 – 5.5″ aluminum cone
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SB17NRX2C35-4 – 6.5″ paper cone
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Satori MW16TX-4 – carbon fiber midwoofer
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Ideal for 3-way systems where you want to cross to the midrange early
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⚖️ Comparison: SB29SDNC vs Others
| Tweeter | SB29SDNC-C000-4 | SB29SDAC-C000-4 | SB26STCN-C000-4 |
|---|---|---|---|
| Dome Size | 29 mm | 29 mm | 26 mm |
| Magnet | Neodymium | Ferrite | Neodymium |
| Faceplate Size | 72 mm | 104 mm | 72 mm |
| Fs | ~700 Hz | ~700 Hz | ~1.6 kHz |
| Crossover Flexibility | Excellent | Excellent | Moderate |
| Best Use Case | Tight layouts, MTM | Traditional 2-ways | Slim 2-ways |
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