The Symmetric Drive (SD) concept with copper in the magnet system was invented by Scan-Speak. High-quality magnet system design has thus been a key feature of Scan- Speak design since the companys inception. The Classic woofers are highly praised, and are used in some of the worlds most exceptional high-end Loudspeakers. Some feature Kevlar cones, others have the innovative Carbon fibre paper cones.
KEY FEATURES:
. Patented Symmetrical Drive Motor Design
. Air Dried Paper/Carbon Fibre Cone
. 42mm Voice Coil
. Low-Loss linear suspension
. Low Damping SBR Rubber Surround
T-S Parameters
Resonance frequency [fs] 30 Hz
Mechanical Q factor [Qms] 1.70
Electrical Q factor [Qes] 0.26
Total Q factor [Qts] 0.23
Force factor [Bl] 7.8 Tm
Mechanical resistance [Rms] 1.66 kg/s
Moving mass [Mms] 15 g
Suspension compliance [Cms] 1.88 mm/N
Effective diaph. diameter [D] 131 mm
Effective piston area [Sd] 135 cm2
Equivalent volume [Vas] 47.9 l
Sensitivity (2.83V/1m) 89 dB
Ratio Bl/ãRe 3.33 N/ãW
Ratio fs/Qts 133 Hz
Electrical Data
Nominal impedance [Zn] 8 K
Minimum impedance [Zmin] 6.6 K
Maximum impedance [Zo] 41.5 K
DC resistance [Re] 5.5 K
Voice coil inductance [Le] 0.2 mH
Power Handling
100h RMS noise test (IEC 17.1) 70 W
Long-term max power (IEC 17.3) - W
Voice Coil and Magnet Data
Voice coil diameter 42 mm
Voice coil height 19 mm
Voice coil layers 2
Height of gap 6 mm
Linear excursion } 6.5 mm
Max mech. excursion } 10 mm
Unit weight 2.1 kg
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