I have a AH350X Trace Elliot head. For speaker output it has a 1/4 inch output for high end and for full power it only has a three prong balanced output... the kind used for mic cables. So my question is can I just get a cable that has balanced on one end and 1/4 inch on the other to use? If not then what? Should I try and get this changed to a 1/4 inch output?