Danger to LCD from Main Speakers Vibration?

I have a Sharp Aquos 52" LCD sitting atop a very wide and low cabinet (114 inches wide). Due to room space constraints, I'd like to move my front channel speakers (JBL three way with 12" woofer) up onto the cabinet on either side of the television. Sharp Tech Support won't commit to advising me on this probably due to legalities. Has anyone ever had any experiences - good or otherwise - with housing a larger LCD television on/in the same cabinet structure which housed full range or fairly full range speakers? Thanks.