The speakers are backup up against wainscoting so the kids don't pull the wires out.Bass will be reinforced with any speaker against the wall affecting the balance of the overall response. Also, if the Heresy is sitting directly on the floor without the optional risers, this will reinforce the bass as well, so a double whammy. If you determine the speakers are OK and decide to use them, I would still recommend getting a pair of these risers,
http://www.critesspeakers.com/heresy-slant-risers.html
assuming you do not currently have risers.