SB Acoustics SB26ST-C000-5 / Fabric Dome Tweeter

The SB Acoustics SB26ST-C000-5 is a 26 mm fabric dome tweeter, part of the brand’s standard series, but don’t let that fool you—it’s a solid, versatile performer known for smooth response, good dispersion, and great value.

Features

• Optimized damping in pole cavity to eliminate internal reflection
• Fine weave soft fabric dome for smooth frequency response
• Saturation controlled motor system for reduced distortion
• CCAW voice coil for low moving mass
• Long life silver lead wires

Specs

• Nominal Impedance 5 Ω
• DC resistance, Re 4.4 Ω
• Voice coil inductance, Le 0.07 mH
• Effective piston area, Sd 6.2 cm2
• Voice coil diameter 25.4 mm
• Voice coil height 1.8 mm
• Air gap height 3 mm
• Linear coil travel (p-p) 1.2 mm
• Moving mass incl. air, Mms 0.33 g
• Free air resonance, Fs 870 Hz
• Sensitivity (2.83 V / 1 m) 91 dB
• Mechanical Q-factor, Qms 5.0
• Electrical Q-factor, Qes 1.64
• Total Q-factor, Qts 1.24
• Force factor, Bl 2.2 Tm
• Rated power handling* 80 W
• Magnetic flux density 1.23 T
• Magnet weight 0.22 kg
• Net weight 0.51 kg

* IEC 268-5,

✅ Highlights

• Classic 1″ soft dome sound – warm, smooth highs with no harsh edge.

• Generous faceplate – improves dispersion, especially off-axis.

• Low Fs (~1.3 kHz) – makes it easy to cross over as low as 1.8–2 kHz.

• Ferrofluid-filled gap – adds damping, improves power handling and consistency.

• Solid motor structure – offers low distortion in the treble range.

🔧 Best Use Cases

• 2-way bookshelf or floorstanders

• Budget to mid-range DIY builds

• Upgrading older systems with smoother high-end

• Matching with 5.25″–7″ woofers (like SB17 series)

🛠️ Crossover Tips

• Recommended crossover: ≥1.8 kHz (can handle lower with steep slopes)

• Pairs well with:

  • SB17NRX2C35-8

  • SB16PFC25-8

  • SB15CRC30-8

Use 12 or 18 dB/octave slopes to optimize blend and protect the tweeter.

⚖️ SB26ST vs Other SB Tweeters

high-pass Butterworth, 2600 Hz, 12 dB/oct.