This is my first stereo install, first supra, first ski boat of my own, etc. so bear with me...I have a pyle head unit with a left, right, and sub woofer (3 total) rca outputs.

I bought the Krypt WS-420 to split the signal to tower and boat speakers, it has a left and right rca input and left and right outputs for the tower and boat, and sub amps. (3 sets of 2) so volume can be adjusted separately on all 3 in theory anyway.

I am stuck because the head unit has a sub output but the ws-420 only has 2 inputs (left and right).

I have a 6 (6 rc inputs) channel amp that will drive 4 tower speakers and 2 subs and a 4 (4 rc inputs) channel amp to drive the 4 boat speakers,

should I just use RCA (1 male x 2 female) splitters between the WS-420 and the amps? Thanks for any suggestions.