Scanspeak D2905/970000 Tweeter, a Classic Range Tweeter. Scanspeak D2905/970000 features a specially hand-coated 1″ textile diaphragm, and uses the Symmetrical DRive SD-2 motor, which gives frequency extension above 30KHz, high power handling and low resonances. Very low Fs. Aluminum face plate. Specification: Resonance frequency [fs] 500 Hz Mechanical Q factor [Qms] 3.45 Electrical Q factor […]
Scanspeak D2905/970000 Tweeter, a Classic Range Tweeter. Scanspeak D2905/970000 features a specially hand-coated 1″ textile diaphragm, and uses the Symmetrical DRive SD-2 motor, which gives frequency extension above 30KHz, high power handling and low resonances. Very low Fs. Aluminum face plate.
Specification:
- Resonance frequency [fs] 500 Hz
- Mechanical Q factor [Qms] 3.45
- Electrical Q factor [Qes] 0.54
- Total Q factor [Qts] 0.47
- Force factor [Bl] 3.5 Tm
- Mechanical resistance [Rms] 0.41 kg/s
- Moving mass [Mms] 0.45 g
- Suspension compliance [Cms] 0.23 mm/N
- Effective diaph. diameter [D] 33 mm
- Effective piston area [Sd] 8.5 cm²
- Equivalent volume [Vas] 0.02 l
- Sensitivity (2.83V/1m) 89.5 dB
- Ratio Bl/√Re 1.61 N/√W
- Ratio fs/Qts 1068 Hz
Electrical Data:
- Nominal impedance [Zn] 6 Ω
- Minimum impedance [Zmin] 5.7 Ω
- Maximum impedance [Zo] 34.6 Ω
- DC resistance [Re] 4.7 Ω
- Voice coil inductance [Le] 0.01 mH
- Power Handling 100h RMS noise test (IEC 17.1)* 225 W
Voice Coil and Magnet Data
- Voice coil diameter 28 mm
- Voice coil height 3.3 mm
- Voice coil layers 2
- Height of gap 2.5 mm
- Linear excursion ± 0.4 mm
- Max mech. excursion ± 1.5 mm
- Unit weight 0.7 kg
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