ELECTRONIC EQUIPMENT REPAIR CENTRE : HARMAN KARDON HKTS 230 ACTIVE SUBWOOFER POWER SUPPLY CIRCUIT AND TROUBLE SHOOTING
Anyone else had problems with E46 Harman Kardon subwoofer amp drawing power? Help me troubleshoot my amp. : r/BMW
SOLVED: How can replace the speaker the bass sound is - Fixya
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ELECTRONIC EQUIPMENT REPAIR CENTRE : HARMAN KARDON SB30 - SB230 Active Sound bar with wireless subwoofer troubleshooting and power supply circuit diagram
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Basically, all Harman Kardon amplifiers (including subwoofers) show power supply issues after a few years « The Wiert Corner – irregular stream of stuff