Hello. I have 6 feet of coax going from my radio to amp. Then I have 18 feet of coax going from my amp to antenna. I only need 4 feet from radio to amp, and only 13 from amp to antenna. Trying to get rid of some of the excess coax coil I have clogging up the area underneath my seat.

Since 6 feet has been recommended from my radio to amp, I'm fine with that length now. But should I cut the length from amp to antenna from 18 feet down to 15?

Thanks!!!!