Basic Specs of the a\d\s 641is:
Frequency Responce +/- 3 db: 40Hz to 22kHz
Sensitivity 2.83 volt 1m: 91 db
Impedence: 4 Ohms
Recommened RMS power : 20 to 150 watts per channel
-Mid- -Woofer-
Fs: 85 hZ 55Hz
Qes: 1.07 .45
Qms: 6.6 7.78
Qt: .92 .43
Center to peak excursion: 2.75 3.5
peak to peak excursion: 1/2 3/4
(Re) Voice coil diameter: 1" / 25.4 mm 3.0
Voice coil length: .45 / 11.5mm 1" / 25.4
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