ESB Audio - 4.28 1.1”/28 mm Silk Dome Tweeter

The ESB 4.28 is a compact yet high-performance silk-dome tweeter engineered for refined high-frequency reproduction. With high sensitivity, smooth response, and efficient motor design, it’s ideal for component systems or UMA units where clarity, minimal distortion, and wide dispersion are required. It complements midrange woofers in ESB speaker systems to deliver clean, articulate highs with excellent integration.

• Model: 4.28
• Type: High-End Silk Dome Tweeter, 1.1″ / 28 mm
• Nominal Impedance: 4 Ω
• Power Handling (RMS): 80 W
• Peak Power Handling: 160 W
• Frequency Response: 2,200 Hz – 25,000 Hz
• Sensitivity: 92.0 dB @ 2.83 V / 1 m
• Dome Material: Silk dome with damping for smooth high frequencies
• Voice Coil: Aluminum or aluminum/copper-clad former, optimally light and rigid
• Magnet: Compact neodymium motor for high magnetic flux with minimal size
• Pole Piece: CNC-machined steel pole to maintain magnetic linearity
• Venting / Cavity Damping: Back-air venting and damping to reduce resonances and distortion
• Faceplate / Flange: Minimal acoustic baffle to reduce diffraction
• Terminals: Gold-plated connector for secure low-resistance connection
• Grille: Optional protective stainless-steel mesh grille included

Mechanical / Mounting Specs:
• Overall Diameter: 1.6″ (40 mm)
• Mounting Depth: 1.0″ (25 mm)
• Cutout Diameter: 1.2″ (30 mm)