Another good tip …
The input gain level is heavily influenced by the EQ settings, the Drive settings etc
My Ray 34 still uses the non active input and I adjust the input level down a bit compared to my PBass
The ABM600 sounds it’s best when played loud and has a weight to the sound that you don’t get with the RM series, a true gigging loving amp
Roqsolid do a nice amp cover if looking
Enjoy