Using some very long balanced Subwoofer cables.

I now own 4 JL Audio F-113 subs and would like to run the front 2 as Master (s) and the rear 2 as Slave units. This would mean that each rear sub would have 75 feet of a balanced XLR cable running to them. The front has about 15 feet to each sub.
This seems to me to be too much cable. Is this too much cable?
And no, I will not be using SR cables just Monoprice to the rear subs.

ozzy