Description
The SB Acoustics SB26STAC-C000-4 is a 26 mm fabric dome tweeter built with affordability and performance in mind. It’s part of SB Acoustics’ standard line and is well-regarded for offering natural, smooth high frequencies with solid build quality, all at a price point that’s hard to beat.
Features
- Cast aluminium faceplate
- Copper cap for reduced voice coil inductance and minimum phase shift
- Non-reflective rear chamber with optimized damping for improved dynamics
- Flow optimized vented pole piece for optimum coupling to rear chamber
- Fine weave soft fabric dome for smooth frequency response
- Saturation controlled motor system for low distortion
- CCAW voice coil for low moving mass
- Long life silver lead wires
- Low resonance frequency
Specs
- Nominal Impedance 4 Ω
- DC resistance, Re 3.2 Ω
- Voice coil inductance, Le 0.04 mH
- Effective piston area, Sd 6.2 cm2
- Voice coil diameter 25.4 mm
- Voice coil height 1.3 mm
- Air gap height 2.5 mm
- Linear coil travel (p-p) 1.2 mm
- Moving mass incl. air, Mms 0.3 g
- Free air resonance, Fs 750 Hz
- Sensitivity (2.83 V / 1 m) 91.5 dB
- Mechanical Q-factor, Qms 3.0
- Electrical Q-factor, Qes 1.78
- Total Q-factor, Qts 1.12
- Force factor, Bl 1.6 Tm
- Rated power handling* 120 W
- Magnetic flux density 1.15 T
- Magnet weight 0.22 kg
- Net weight 0.53 kg
* IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.
✅ Strengths & Applications
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Smooth, detailed treble – thanks to the coated fabric dome
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Low distortion – especially in the critical 2–10 kHz range
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High efficiency – ~91 dB sensitivity is excellent for a dome tweeter
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Budget-friendly – ideal for cost-conscious, high-performance builds
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Great for 2-way or 2.5-way designs using 5″ to 7″ woofers
🛠️ Crossover Tips
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Recommended crossover point: ≥2.0–2.5 kHz
(12 dB or 18 dB/octave slopes preferred) -
Pairs well with:
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SB17NRX2C35-4 (6.5″ woofer)
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SB15CRC30-4 (5.5″ ceramic cone woofer)
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Or any midwoofer with a natural roll-off above 2 kHz
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⚖️ How It Compares
| Tweeter | SB26STAC-C000-4 | SB26STCN-C000-4 | SB26ST-C000-5 |
|---|---|---|---|
| Magnet | Ferrite | Neodymium | Ferrite |
| Faceplate Size | 104 mm | 72 mm | 104 mm |
| Impedance | 4 ohms | 4 ohms | 6 ohms |
| Sensitivity | ~91 dB | ~91 dB | ~90 dB |
| Fs | ~1.5 kHz | ~1.6 kHz | ~1.3–1.5 kHz |
| Size Advantage | Standard | Compact | Standard |
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