Im running a system with a computer running jriver media center to a nad c510 pre-amp dac which does not have a sub output I have connected it to a sub in the past to subwoofers using the speaker wire connection option but the new svs sub i bought does not have them only rca inputs -Normally you would hook it up with a rca Y connector but I've got the nad dac hooked up to a power amp using xlr cables-do the rca's stll put out a signal when xlrs are being used or what are my options? any ideas🙂