SB Acoustics SB19ST-C000-4 / Fabric Dome Tweeter

The SB19ST-C000-4 is a ¾-inch (19 mm) fabric dome tweeter from SB Acoustics, designed to offer smooth response, tight dispersion, and excellent integration with small to mid-sized woofers.

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 4 Ω
  • DC resistance, Re 3.4 Ω
  • Voice coil inductance, Le 0.07 mH
  • Effective piston area, Sd 3.8 cm2
  • Voice coil diameter 19.1 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 0.22 g
  • Free air resonance, Fs 980 Hz
  • Sensitivity (2.83 V / 1 m) 88.5 dB
  • Mechanical Q-factor, Qms 6.45
  • Electrical Q-factor, Qes 1.50
  • Total Q-factor, Qts 1.22
  • Force factor, Bl 1.75 Tm
  • Rated power handling* 30 W
  • Magnetic flux density 1.24 T
  • Magnet weight 0.13 kg
  • Net weight 0.32 kg

  * IEC 268-5, high-pass Butterworth, 2600 Hz, 12 dB/oct.

✅ Strengths

• Smooth and natural top end – great for relaxed, non-fatiguing listening.

• Compact size – perfect for narrow baffles or small speaker designs.

• Relatively low Fs – allows crossovers around 2.5–3 kHz if designed carefully.

• Good power handling for its size, thanks to ferrofluid and solid motor design.

• Affordable, high-quality option for both DIY and OEM speaker builds.

🔧 Typical Applications

• 2-way bookshelf or desktop speakers

• Slim tower speakers with smaller midwoofers (4″–6.5″)

• Car audio builds

• Nearfield monitors

🛠️ Crossover Tips

• Recommended Crossover: ≥2.5 kHz, ideally 3 kHz+ with 12–18 dB/oct slopes.

• Works especially well when paired with SB Acoustics 4–5″ midwoofers or even with the SB13 or SB15 series.

⚖️ Comparison: SB19ST vs SB26ST