Dynaquest DQ12 subwoofer

Dynaquest DQ12 subwoofer

I thought about sharing a variety of valuable things here in my blog. I remember buying an old cheap Pioneer AVR (Audio Video Receiver) late last year with some minor volume dial glitch, but no big deal since I can always conveniently use the remote to adjust the volume. It was already dirt cheap but the seller still added two pairs of Wharfedales (front and rear), Kenwood center and a grounded (humming) 12 inch Dynaquest DQ12 subwoofer as freebies (or should it be the other way around, the AVR being the freeby instead). I thought about sending the sub for repair but I first did some googling about humming grounded subs which are common among subs conflicting cable connections with AVR and power outlets. I came across a Polk Audio subwoofer manual mentioning the preferred AVR to sub hookup using the speaker level input/output (see figure below) instead of the usual sub line level input. And voila, humming went off and my sub suddenly knows how to sing with lyrics instead of just humming the tune.

Subwoofer and AVR speaker level input output connection

Subwoofer and AVR speaker level input output connection