Pondering REL and Dynaudio subwoofers.

@dwette 

 connect the base pair of the REL sub array to the main loudspeaker terminals directly, but just the red/yellow (hot) leads. I connect the black ground leads back to a common grounding station for my system (a Clearaudio Terra), instead of the ground terminal on the speakers.

This is confirmation of what I did on post 6. It seems to work well.

@dwette  sounds like a heck of a REL subwoofer array! Didn't have a grounding station but did try grounding through a couple different components.   I'd assume Rel would have a reliable solution for class D amps, but no.

It's a mute point for me now.  I traded in my REL Classic 99 for the Dynaudio Sub 6.   I'll be happy to report back here once I have it set up in about a week.

@grantgg 

Grounding can be a challenge in a system, and it can vary from one system to the next. Until I came upon my current solution I either had low level hum in my speakers or the same in my subs. Now it’s finally eliminated completely. I’m glad to now have a common ground station for the system. If I add anything that needs to be grounded I know where to connect it. I sourced a 25’ 14 gauge ground wire from Amazon for nearly nothing to make up more ground wires if I need. For now, I have no hum/buzz whatsoever.

I also have my hifi on a quad outlet connected to a dedicated circuit, on an electrical sub-panel with its own ground, separated from the rest of the house (and all the appliances and HVAC).

@gotolondon2   I have had Velodyne, JL Audio, and SVS subs. 

Which model Velodyne and how did you determine its position in your room?

I had an HGS10 and 12 as well as DD12 and DD15. I did the sub crawl method beck then. I couldn't get good results with either of the DD's on board processor.