actually one thing you may wish to check before you go too much farther is that the speakers are hooked up correctly. Check to make sure the straps between the binding posts on the back of the speakers are secure. You may also want to get your ear right up to the speaker (at lower volumes) and make sure that all the drivers are firing. It is very rare, but once in a while, the internal wiring will jiggle loose in transit and result in one of the woofers or tweeters not firing.
My apologies if someone has already mentioned this or if you have already checked.
