Used the GR cab in anger for the first time today, rehearsing with a new band.
As my Orange Terror hasn't arrived, I used my ancient (~1983) 150W Laney Probass. It has very complex sound shaping, I just lifted the low end very slightly and a small low-Q boost on the parametric at 400Hz. In the past, this amp has never had any particularly great praise, but today the guys couldn't stop praising the sound I was getting. Full, rich, lows, harmonics bell-like, great clarity for sounds up at the dusty end.
I am expecting it to sound utterly mindblowing with the Bass Terror.