Description
The SB Acoustics SB26ADC-C000-4 is a 1″ (26 mm) aluminum dome tweeter designed to deliver crisp, detailed highs with a touch of metallic sparkle, all while maintaining smooth frequency response and low distortion. It’s an excellent option for those who prefer a more analytical and revealing top end compared to soft domes.
Features
- Phase optimized diaphragm design for coherent high frequency radiation
- 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
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 0.38 g
- Free air resonance, Fs 680 Hz
- Sensitivity (2.83 V / 1 m) 90 dB
- Mechanical Q-factor, Qms 2.7
- Electrical Q-factor, Qes 1.88
- Total Q-factor, Qts 1.11
- Force factor, Bl 1.6 Tm
- Rated power handling* 120 W
- Magnetic flux density 1.15 T
- Magnet weight 0.22 kg
- Net weight 0.5 kg
* IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.
✅ Why It’s a Strong Choice
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Aluminum dome delivers fast transients, excellent detail, and a bright, precise treble.
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Low Fs (~1.5 kHz) enables crossover flexibility, even down to ~2 kHz with proper slope.
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Solid motor structure and ferrofluid ensure low distortion and consistent output.
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Great pairing for metal-cone midwoofers (e.g., aluminum, magnesium, ceramic) to maintain tonal consistency.
🛠️ Crossover Tips
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Recommended crossover point: ≥2.0–2.5 kHz
(Use 3rd or 4th-order filters for added protection if crossing low) -
Ideal matches:
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SB15NBAC30-4 (5.5″ aluminum midwoofer)
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SB17NBAC35-4 (6.5″ aluminum cone)
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Other clean-sounding drivers that benefit from added treble clarity
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⚖️ How It Compares to Other SB26 Tweeters
| Tweeter | SB26ADC-C000-4 | SB26STCN-C000-4 | SB26STWGC-4 |
|---|---|---|---|
| Dome Material | Aluminum | Fabric | Fabric w/ waveguide |
| Tonal Signature | Bright, detailed | Smooth, natural | Controlled, efficient |
| Sensitivity | ~91 dB | ~91 dB | ~93 dB |
| Fs | ~1.5 kHz | ~1.6 kHz | ~1.4 kHz |
| Faceplate | 104 mm | 72 mm | 104 mm w/ waveguide |
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