Room interactions and tuning and so on get some attention, but here's my story, and also some comments. First comment is that I never had any significant room problems in the past. It was getting the S300 that made them really apparent. I know some of why this happened (the design of the meadowlarks was heavily affected but my previous DM602s weren't so much, but with the previous rotel amp the room interaction masked some of the brightness which made for a reasonable balance). The effects I was dealing with were a real heaviness in the sound, and lumpy, ill-timed bass. I knew that the floor was having an effect (I could feel it. It's a large chipboard floor in an upstairs room), but I thought that was all I was dealing with. However, moving the speakers around within the space I could move them helped somewhat, and I found that moving them further into the room helped remove the heaviness. However, moving them closer to the back wall and partially blocking the transmission line outlet helped tighten up the bass. So, I rearranged the room, allowing the speakers to move in from the side walls, and the heaviness went away. The bass problems remained, even once I had the distance from the back wall tuned to give the right level of bass output. Today I made some progress on the bass issue though. New plinths for the speakers (copies of the Larc audio ones... mine are 30mm thick granite, 400mmx500mm with three alu cones on the underside) have replaced my old attempts with random offcuts of paving slab . These have helped quite a lot. Thankfully, the room is no longer in control!
