WOOFER 21W/8555-10
The 21W/8555-10 is a mechanically upgraded version of 21W/8555-00, its major
change is the a alu chassis, that maintain same shape, dimensions and visual
appearance. The patented Symmetric Drive (SD-1) concept with copper in the
magnet system and carbonfiber paper cone and low loss linear suspension continues
to be the key features that make the 21W/8555-10 one of the best 8” woofers
available.
KEY FEATURES:
· Patented Symmetrical Drive Motor Design SD-1
· Low-Loss linear suspension
· Low Damping SBR Rubber Surround
· Die Cast Alu. Chassis
· Air Dried Paper/Carbon Fibre Cone
· 42mm Voice Coil
T-S Parameters
Resonance frequency [fs] 20 Hz
Mechanical Q factor [Qms] 4.50
Electrical Q factor [Qes] 0.33
Total Q factor [Qts] 0.31
Force factor [Bl] 8.2 Tm
Mechanical resistance [Rms] 0.89 kg/s
Moving mass [Mms] 32 g
Compliance [Cms] 1.98 mm/N
Effective diaph. diameter [D] 167 mm
Effective piston area [Sd] 220 cm²
Equivalent volume [Vas] 134 l
Sensitivity (2.83V/1m) 87 dB
Ratio Bl/√Re 3.50 N/√W
Ratio fs/Qts 65 Hz
Notes:
IEC specs. refer to IEC 60268-5 third edition.
All Scan-Speak products are RoHS compliant.
Data are subject to change without notice.
Datasheet updated: January 22, 2016.
Electrical Data
Nominal impedance [Zn] 8 Ω
Minimum impedance [Zmin] 6.4 Ω
Maximum impedance [Zo] 80.5 Ω
DC resistance [Re] 5.5 Ω
Voice coil inductance [Le] 0.4 mH
Power Handling
100h RMS noise test (IEC 17.1) 100 W
Long-term max power (IEC 17.3) 160 W
Voice Coil & 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 ± 12 mm
Unit weight 2.2 kg
N.C. Madsensvej 1 · 6920 Videbæk · Denmark · Phone: +45 6040 5200 · www.scan-speak.dk