Pulling wired comm system

[megamile]

Bought a new helmet with Sena built in; added Sena to wife's helmet. Very happy but can not run wired setup on trike and Sena at the same time; no room for 2 speakers in each helmet. Planning to remove entire sound system on trike-tuner, amp, plugs, CB, wiring, etc. Adding Sena controller to coordinate extras I will use. Adding a Cobra AllRoad 75 CB with remote box, USB mike (if necessary) because it will plug into Sena controller, and also bluetooth to helmet out of the box. Sena comes with FM radio; phone wil cover everything else music, and CB will layer with all of that plus intercom. Leaving speakers on trike because I sometimes like to use them. Looking for an amp that I can plug phone and Sena controller into to pipe phone output through trike speakers if necessary. Needs to be roughly the size of the tuner I'm taking out, would prefer 4 channel output that won't blow stock speakers. Any ideas or advice?

Thank you in advance...