A copper phase plug reduces compression due to temperature variations in the
voice coil, increases long term power handling capacity and eliminates
resonances in the cavity inside the voice coil former. The extremely stiff and
stable injection moulded metal basket keeps the critical components in perfect
alignment.
Large windows in the basket both above and below the spider
reduce sound reflection, air flow noise and cavity resonance to a minimum.
The frequency responses above show measured free field sound pressure in 0,
30, and 60 degrees angle using a 10L closed box. Input 2.83 Vrms, microphone
distance 0.5m, normalized to SPL 1m.The dotted line is a calculated response in
infinite baffle based on the parameters given for this specific driver. The
impedance is measured in free air without baffle using a 2V sine signal.
Nominal Impedance 4 Ohms
Recommended Frequency Range 45 -
2500 Hz
Short Term Power Handling * 250 W
Long Term Power Handling * 80
W
Characteristic Sensitivity (2,83V, 1m) 88.0 dB
Voice Coil Diameter 39
mm
Voice Coil Height 20 mm
Air Gap Height 6 mm
Linear Coil Travel (p-p)
14 mm
Maximum Coil Travel (p-p) 22 mm
Magnetic Gap Flux Density 1.05
T
Magnet Weight 0.64 kg
Total Weight 2.15 kg
Voice Coil Resistance 3.0
Ohms
Voice Coil Inductance 0.25 mH
Force Factor 5.3 N/A
Free Air
Resonance 37 Hz
Moving Mass 14.8 g
Air Load Mass In IEC Baffl e 0.53
g
Suspension Compliance 1.3 mm/N
Suspension Mechanical Resistance 1.34
Ns/m
Effective Piston Area 94 cm2
VAS 15 Litres
QMS 2.66
QES
0.38
QTS 0.33
