The Symmetric Drive (SD-1) 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
Specifications
power handling (continuous/programme) = 100 W
frequency range = 20-1500 Hz
resonance frequency fs = 20 Hz
impedance R = 8 Ohm
sound pressure level SPL = 87 dB (2,83V; 1m)
DC resistance Re = 5,5 Ohm
force factor BL = 8,2 N/A
voice coil inductance L = 0,4 mH
effective piston radiating area Sd = 220 cm2
effective mechanical mass incl. air load mms = 32 g
equivalent volume of compliance Vas = 134 l
total Q factor Qts = 0,31 (Qms=4,5, Qes=0,33)
voice coil diameter = 42 mm
maximum peak linear excursion vibration xlin = +/- 6,5 mm
