Hi,
If the bridging bars are snugged and secured and you still can't get the mids and tweeters going; remove them and feed the signal (connecting your speaker wires) alternatively only to the top pair and to the lower pair of binding posts. The top pair should give you audio from the mids and the tweeters only; the lower pair from the woofers only.
If the top pair still does not provide any audio and the botom one allows you to get audio from the woofers then dial Axiom's toll free number 1.866.244.8796 for immediate assistance.
