Specifications and Key Parameters of 2-Inch Speakers
1. Physical Dimensions
Diameter: 2 inches = 50.8 mm ≈ 5 cm (actual frame size typically 55–60 mm)
Common Thickness: 20–35 mm (including magnet assembly)
Mounting Hole Spacing: Usually 40–45 mm (diagonal screw-hole distance)
2. Performance Characteristics
Effective Piston Area: Approx. 12–15 cm²
Typical Frequency Response:
Low-end cutoff: 150–300 Hz
High-end extension: 15–18 kHz
Power Handling:
Rated (RMS) Power: 3–10 W
Peak Power: 15–25 W
3. Common Applications
Compact audio systems (e.g., USB-powered PC speakers)
Portable electronics (Bluetooth speakers, alarm clock radios)
High-frequency augmentation (paired with larger main drivers)
Intercom/security device speakers
4. Selection Considerations
Sound quality heavily depends on diaphragm material:
Paper cone: Warm tone but susceptible to moisture
Polypropylene cone: Moisture-resistant with longer lifespan
Metal dome: High clarity but may sound harsh
Recommended usage:
For standalone use, add a passive radiator to enhance bass
Optimal listening distance: 0.3–1 meter