Classic 8" Woofer
ScanSpeak
Type Number:21W/8555-00

Features

The Classic line consists of all the highly regarded transducers that have been appraised and loved by so many customers over the years. The goal has been to assemble all the diamonds, developed over the years, speakers that fully live up to the heritage of the brand.

Driver Highlights: Hard paper cone, low loss rubber surround, SD-1 motor

Specs

Electrical Data
Nominal Impedance Zn 8 ohm
DC Resistance Re 5.5 ohm
Voice Coil Inductance Le 0.4 mH
TS Parameters
Resonance Frequency fs 20 Hz
Mechanical Q factor QMS 4.5
Electrical Q factor QES 0.33
Total Q factor Qts 0.31
Force Factor Bl 8.2 Tm
Mechanical Resistance Rms 0.9 Kg/s
Moving Mass Mms 32 g
Effective Piston Area sd 220 cm^2
Equivalent Volume Vas 136 ltrs
Sensitivity 2.83V/1m 87 dB
Power Handling
100h RMS noise test IEC 100 W
Voice Coil and Magnet Parameters
Voice Coil Diameter 42 mm
Linear Excursion +/- 6.5 mm
Max mech. excursion +/- 12 mm

Frequency

Mechanical Dimensions

Drawing Dimensions
Outside Diameter OD 222 mm
Magnet Diameter MD 121 mm
Cutout Diameter CD 194 mm
Interior Depth ID 82 mm
Hole Diameter HD 5 mm
Screw Circle Diameter SD 214 mm