Description
The SB Acoustics SB26STWGC-4 is a 26 mm (1”) fabric dome tweeter with an integrated waveguide, designed for improved dispersion, higher efficiency, and easier crossover integration. It’s a step above standard dome tweeters when you want controlled directivity and a cleaner handoff to the midwoofer.
Features
- Solid aluminium waveguide
- Controlled directivity
- Adapter ring for bolt-less mounting to driver
- 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 780 Hz
- Sensitivity (2.83V/1m) 93 dB
- Mechanical Q-factor, Qms – 2.8
- Electrical Q-factor, Qes – 2.1
- Total Q-factor, Qts – 1.2
- Force factor, Bl – 1.6 Tm
- Rated power handling* 120 W
- Magnetic flux density 1.15 T
- Magnet weight 0.22 kg
- Net weight 0.61 kg
*IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct
✅ What Makes It Special
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Built-in waveguide: Improves efficiency and off-axis response, while also allowing lower crossover points with smoother integration.
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Higher sensitivity (~93 dB) than standard domes – great for high-efficiency speakers or tube amps.
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Controlled dispersion: Reduces baffle edge diffraction and reflections.
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Natural, open treble: Fabric dome delivers smooth highs without harshness.
🛠️ Recommended Crossover Range
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Suggested crossover: 1.6–2.2 kHz
(12 or 18 dB/oct slopes; 4th order ideal if going low) -
Excellent match for:
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SB17NRXC35-4 (6.5″ midwoofer)
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SB15NBAC30-4 (5.5″ aluminum cone)
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Satori MW16P-4 if you’re combining performance and value
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⚖️ Compared to Other SB26 Tweeters
| Tweeter | SB26STWGC-4 | SB26STCN-C000-4 | SB26STAC-C000-4 |
|---|---|---|---|
| Waveguide | ✅ Yes (built-in) | ❌ No | ❌ No |
| Magnet Type | Ferrite | Neodymium | Ferrite |
| Sensitivity | ~93 dB | ~91 dB | ~91 dB |
| Fs | ~1.4 kHz | ~1.6 kHz | ~1.5 kHz |
| Crossover Flexibility | Excellent | Good | Good |
| Sound Signature | Clean, focused, efficient | Smooth, compact | Smooth, balanced |
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