I have a set of Wharfedale Diamond 8.2A's and I have a question about the inputs. It will accept 3 different input jacks: XLR, 1/4, and RCA. The XLR and the 1/4" plugs are one and the same. The RCA is a seperate plug. My question is, would it harm the speakers if I were to use both the 1/4's...