hey fellas, a quick off topic question, i know the spec's, but, can the QS4's safely function at 80hz or is that pushing it too close to danger?

SonySXRD55"
Marantz AV7702MKII pre-amp
Emotiva XPA-5,UPA-2amps,
14 Speakers, All Axiom
Oppo 105D&93