D2908/714000

TWEETER D2908/714000

D2908/714000 is a highly efficient and high-power 8 ohm 1" beryllium dome tweeter, it reproduces music clean and clear at all listening levels with dynamic precision and a superb vocal rendition as when recorded. The smooth machined alu faceplate and the acoustical very transparent wire-mesh protection grille not only represent a beautiful appearance is also allows the sound to be dispersed free and undistorted to the listener.

KEY FEATURES:
· Beryllium Diaphragm (99% Pure Be)
· Patented Symmetrical Drive (SD-2) motor
· Black Anodized Ø120mm Machined Alu Faceplate
· Rear Mount Magnet System
· Titanium Voice Coil Former
· Non Resonant Aluminium Rear Chamber

T-S Parameters
Resonance frequency [fs] 534 Hz
Mechanical Q factor [Qms] 7.3
Electrical Q factor [Qes] 0.50
Total Q factor [Qts] 0.47
Force factor [Bl] 3.6 Tm
Mechanical resistance [Rms] 0.15 kg/s
Moving mass [Mms] 0.33 g
Compliance [Cms] 0.26 mm/N
Effective diaph. diameter [D] 30 mm
Effective piston area [Sd] 7 cm²
Equivalent volume [Vas] 0.02 l
Sensitivity (2.83V/1m) 92 dB
Ratio Bl/√Re 1.5 N/√W
Ratio fs/Qts 1136 Hz
Electrical Data
Voice Coil & Magnet Data
Nominal impedance [Zn] 8 Ω
Minimum impedance [Zmin] 6.5 Ω
Maximum impedance [Zo] 90 Ω
DC resistance [Re] 5.7 Ω
Voice coil inductance [Le] 0.02 mH
Power Handling
100h RMS noise test (IEC 17.1)* 130 W
Long-term max power (IEC 17.3)* 200 W
*Filter: 2. order HP Butterworth, 2.5 kHz
Voice coil diameter 26 mm
Voice coil height 2.1 mm
Voice coil layers 2
Height of gap 2.5 mm
Linear excursion ± 0.2 mm
Max mech. excursion ± 1.6 mm
Unit weight 0.5 kg