Scanspeak D2905 930000 1” Dome Tweeter 6Ω 150 Watt

Scanspeak D2905/930000 Tweeter, a Classic Range Tweeter. A very popular design for a long time, the D2905/930000 features a specially hand-coated 1″ textile diaphragm resulting in a smooth, detailed and very transparent sound and low levels of distortion and resonances. Aluminum face plate.

This tweeter has a low resonance rear chamber, and a light ferrofluid is used.

Specification:

• Resonance frequency [fs] 650 Hz
• Mechanical Q factor [Qms] 0.94
• Electrical Q factor [Qes] 0.72
• Total Q factor [Qts] 0.41
• Force factor [Bl] 3.5 Tm
• Mechanical resistance [Rms] 1.96 kg/s
• Moving mass [Mms] 0.45 g
• Suspension compliance [Cms] 0.13 mm/N
• Effective diaph. diameter [D] 33 mm
• Effective piston area [Sd] 8.5 cm²
• Equivalent volume [Vas] 0.01 l
• Sensitivity (2.83V/1m) 90 dB
• Ratio Bl/√Re 1.61 N/√W
• Ratio fs/Qts 1598 Hz

Electrical Data:

• Nominal impedance [Zn] 6 Ω
• Minimum impedance [Zmin] 5.4 Ω
• Maximum impedance [Zo] 10.9 Ω
• DC resistance [Re] 4.7 Ω
• Voice coil inductance [Le] 0.07 mH
• Power Handling 100h RMS noise test (IEC 17.1)* 150 W

Voice Coil and Magnet Data

• Voice coil diameter 28 mm
• Voice coil height 3.3222 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