Hi, I need a one meter interconnect from my rca sub out to an input on my QSC amplifier. The amp has XLR, 1/4-inch TRS input jacks, or a detachable terminal block for inputs. But no RCA inputs. What should I do? Can I just buy an interconnect with RCA ends and cut off one end and add an XLR connection? Or do they make adaptors? What is my best option? I'd like to stay under $50 so if you could recommend a specific brand or website to order from that would be great. Thank you!