I've been using a Harman/Kardon AVR 310 for a few years now. I got a HSU STF 2 a while back, and have never got it working properly with the receiver. I hooked it up initially and appeared to be getting nothing from the subwoofer out on the H/K 310. I figured I would worry about it later and just hooked the sub directly into the DVD sub out, and that worked fine.
So now I've been trying to get the sub to work off the receiver so I can get LFE on all sources. I've got the interconnect plugged from the subwoofer plug in the PRE OUT'S section on the H/K. And that interconnect is of course going to the Sub IN on the HSU. I've played with the settings in the speaker setup section on the H/K, trying every combination of Subwoofer setting and speaker size setting, and I get nothing from the sub.
Either I'm overlooking something really stupid here, or the pre-outs (including the Sub out) on my H/K just don't work. I've never used them for anything else. I tried other outputs on the H/K including Main L/R outs, and get nothing.
I work with A/V equipment on basically a daily basis. I haven't spent a lot of time troubleshooting this one. Just thought I would ask here and see if someone has been through this with the H/K AVR 310 before I start pulling out more gear to troublehoot.