I'm planning a baffle wall and with at least one possible scenario, it would work out well to put the left and right speakers directly on top of the subwoofer enclosures. Could there be a problem with this? Would I need to put some foam in between and/or anchor them together somehow to prevent the cabinets from resonating against each other?
I haven't noticed an issue. I purchased a set of these sorbothane isolators and used 4 per speaker. http://amzn.to/2lUPzPs