Does the MJA Ref 100 sub have 2 x phono RCA inputs for the LFE? If so, do both have to be used? I've been looking at the pics on their website...I might be mistaken but it looks like a pair of phono RCA inputs on the back of the unit. My amp only has a single subwoofer input. So if a pair of phono cables has to be used with the Ref 100, presumably I'd need a Y-connector of some sort at the amp end? Also...what's the low-level cable like that comes with the MJA subs? Is it any good or should I replace it with a 3rd party one? Anyone able to tell me the answers?