2½″ SB65WBAC25-4 / Aluminum
Features
- Geometrically furrowed aluminum cone for extended usable frequency range
- Copper cap for increased high frequency output, reduced phase shift at higher frequencies and improved power handling capability
- Low damping surround and non-conductive voice coil former to ensure dynamics and an open/transparent sound character with excellent detailing/resolution
- Linear neodymium motor system for reduced distortion
- Vented voice coil former for reduced compression
Specs
- Nominal Impedance 4 Ω
- DC resistance, Re 3.6 Ω
- Voice coil inductance, Le 0.15 mH
- Effective piston area, Sd 20 cm2
- Voice coil diameter 25.4 mm
- Voice coil height 8.3 mm
- Air gap height 3 mm
- Linear coil travel (p-p) 5.3 mm
- Magnetic flux density 1.02 T
- Magnet weight (NEO) 0.02 kg
- Net weight 0.14 kg
- Free air resonance, Fs 115 Hz
- Sensitivity (2.83 V / 1 m) 83.5 dB
- Mechanical Q-factor, Qms 6.0
- Electrical Q-factor, Qes 0.77
- Total Q-factor, Qts 0.68
- Moving mass incl. air, Mms 2.5 g
- Force factor, Bl 2.9 Tm
- Equivalent volume, Vas 0.43 liters
- Compliance, Cms 0.77 mm/N
- Mechanical loss, Rms 0.3 kg/s
- Rated power handling* 20 W
* IEC 268-5, high-pass Butterworth, 200 Hz, 12 dB/oct, T/S parameters measured on drive units that are broken in.