28mm Aluminium Dome Treble
D2904/980000 is a high end 28mm aluminium dome tweeter.
The magnet system uses Scanspeak's Symmetric Drive technology that almost eliminates electrical phase shift and a carefully designed chamber under the surround minimises air noise and compression. The geometry of the light weight aluminium dome causes the characteristic "break up" peak to appear far beyond the audible range and a specially designed diffusor is used to equalise the upper octave response.
The D2904/980000 has a very clear, detailed and open sound characteristic, with a smoothness rarely found in other aluminium domed treble units.
Faceplate Diameter: 104mm
Sensitivity (2.83v/1m): 90dB
Nominal impedance: 8 ohm
Frequency range: 2-22kHz
Free air resonance: 500Hz
DC resistance (Re): 3.5 ohm
Voice coil inductance (Le): 0.01mH
Effective piston area (Sd): 8.5cm
Moving Mass (Md): 0.50g
Force factor (BL): 2.8Tm
Excursion (lin-max): +/-0.1 - +/-1.5mm
Voice coil diameter: 28mm
Nominal power handling: 160w
Faceplate diameter: 104mm
Overall depth (front of faceplate to rear of chamber): 46mm
Faceplate thickness: 3mm
Fixing holes: 4 x 5mm diameter on 90mm PCD
Rear chamber diameter: 73.5mm
Price per single unit excluding VAT