Rumble 100 v3 Mod :
-Changed stock speaker to Eminence USA Beta 12A-II
-Lined inside with 1/2” acoustical foam.
-Added rear dish with 2 combo Neutrik 1/4-Speakon jacks.
Short cable when used as a combo- cable fits within the recessed dish.
This allows me to use the box as a combo or to use the box with a different amp if I want.
So since I like to carry a spare- if the onboard amp craps out I just whip out my backup, hook it up and rock on.
Tone is a lot tighter and has much better focus and volume (higher sensitivity speaker).
See Pics
I have a material list from PartsExpress if anyone needs the info.