Two types of circuit is used with this sub-woofer. KS303HT is IC type, KS SW22HT and KS SW25HT are power transistor type.
Output power - 50Watts RMS at 4 Ohms.Loudspeaker – 8 inch cone type
Nominal impedance – 4 Ohms
Supply voltage – AC120V
Power IC type schematic and PWB
Power transistor type schematic and PWB
Exploded view
Click on the pictures to magnify