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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Help with Harmon Kardon PC Sub

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  • Help with Harmon Kardon PC Sub

    Hey, guys. While perusing the electronics selection at Goodwill yesterday, I picked up a Harmon Kardon H/K595 subwoofer for $15. This would be perfect for my small home office. Unfortunately, the sub requires its companion desktop speakers w/ integrated controller to work; specifically, the Left speaker contains the volume/treble/bass control.

    I use an SMSL AD18 80x2 watt amplifier for my desktop Left/Right, and would like to connect the Sub output from this amplifier to the input on the sub amp. Is there a way to bypass Left speaker control module so I can get this to work as just an amplified subwoofer? I realize that bypassing the controller will remove the LPF to the sub, so I could just pick up a cheap inline Dayton LPF to keep the high frequencies away from the sub.

    Also, the Left/Right connectors appear to be XLR-type jacks (which I’m not familiar with).

    If I can get this amp to also power my desktop speakers, that would be an added bonus. I’d like to use my SMSL AD18 as my project amp, so I don’t always have to disconnect it when I’m playing with a new build.
    Any help is greatly appreciated, as I’m a novice w/ limited electronics knowledge who is just getting into audio.

    Close-up of Left/Right output Left/Right output - the other side Amp back plate
    Last edited by JIF; 02-11-2018, 11:07 AM. Reason: Sorry, this was the wrong forum. Trying to find the "Delete" button.