Scanspeak D2905 930000 1” Dome Tweeter 6Ω 150 Watt

• 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

• 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 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

1” high frequency compression driver, titanium
diaphragm, flat aluminium wire voice coil, low distortion,
extremely good response from 1.5 kHz. to 18 kHz.

Specifications1
Throat Diameter 25 mm. (1 in.)
Nominal Impedance 8 Ω
Minimum Impedance 7.6 Ω
Power Handling
(1500 –20000 Hz)
Nominal2 60 W
Continuous Program3 120 W
Sensitivity (1W/1m)4 106 dB
Frequency Range 1 – 18 kHz
Recommended Crossover5 1.5 kHz
Voice Coil Diameter 44 mm. (1.7 in.)
Winding Material Aluminium
Inductance 0.11 mH
Diaphragm Material Titanium
Flux Density 1.7 T
Also available in 16 Ω, data upon request

Mounting and Shipping Informations
Two M6 holes 180° on 76 mm. (3 in.) diameter
Three M6 holes 120° on 57 mm. (2.2 in.) diameter
Overall Diameter 134 mm. (5.3 in.)
Depth 68 mm. (2.7 in.)
Net Weight (1 unit) 2.9 Kg. (6.4 lb.)
Shipping Weight (4 units) 12.5 Kg. (27.5 lb.)
Shipping Box (4 units) 300x160x180 mm.
(12x6.3x7.1 in.)
1 Driver mounted on B&C ME 45 horn.
2 2 hours test made with continuous pink noise signal (6 dB crest factor) within
the specified range . Power calculated on rated minimum impedance.
3 Power on Continuous Program is defined as 3 dB greater than the Nominal
rating.
4 Applied RMS Voltage is set to 2.83V for 8 ohms and 4V for 16 ohms Nominal
Impedance. Average SPL from 1000 to 18000 Hz.
5 12 dB/oct. or higher slope high-pass filter.

Driver 1" 20W, 107dB