Midwest Audio Fest

It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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kab230v3 ground loop hum?

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  • kab230v3 ground loop hum?

    Anybody experiencing this with the Bluetooth active? As soon as the Bluetooth part goes in standby the hum goes away. Doesn’t matter if on power supply, battery or both.

    there isn’t much to ground (power jack, led on aftermarket power switch) but like I said, it’s only when Bluetooth is active.

    Thanks for any ideas, this is a commissioned build. 😕
    Builds - C-Killa - Speedsters - LithMTM - Talking Sticks - Pocket Rockets - Khanspires - Dayton RS Center - RS225/28A - Kairos - Adelphos - SEOS TD12X - Dayton 8 - Needles - 871S - eD6c - Overnight Sensations - Tritrix (ported) - Lineup F4 - Stentorians - The Cheapies - Tub Thumpers - Barbells - Tuba HT - Numerous subwoofers - probably missing a few...... :p