Need help with splitting XLR OUTPUT

Can anyone help me with this question about splitting the subwoofer XLR OUTPUT from my processor to 4 different amps? I am currently using a single XLR. Cable that has a 3 way split from it and concerned about the signal being split again. I only have a Meridian 861 processor that only has a single XLR subwoofer out and I have to send one signal to my pair of JL Gotham subs and two other XLR cables to two separate Velodyne subwoofer amps.
One of the Velodyne amps drives a custom made subwoofer in my rear seat riser and the other amp drive my Buttkickers in the seating. I just added another row of seating and have another row of Buttkickers to drive but am concerned about splitting the single
XLR output signal into 4 different wires. What is the best way to keep the signal pristine or does it even matter that I am splitting it four ways. Should I just add another XLR Y splitter to one of the existing output cables, get another cable that has the single on one side that plugs into the Meridian with 4 cables broken out from it, or use some type of box? The Velodyne amps have RCA passthroughs on them but everytime I have tried to use the RCA input/outputs on anything connected to the Meridian setup I get some type of ground noise so I have to stick to the balanced connections.