I've had my RH450 and RC4 for several months now, and I dig it!
I'm going to try the posted flat EQ settings from BGM and use that as my new starting point, should give more room for dialing in tones with a solid flat response as a starting point.
I have three presets that I call Deep, Punch and Growl...I've used these named settings for years with my old Tech 21 Programmable Bass Driver DI which coincidentally also had 3 presets.
FWIW, Deep is a smooth bass sound, reminiscent of Beatles era McCartney; Punch has a bit more bite, close approximation to my favorite Trace Elliot MP11 (which I still own) setting ...a blend of Flea / Steve Digiorgio tone; finally, Growl is an early '70s Yes Chris Squire tone (Fragile, CTTE, Relayer, etc.). My main bass is a Ric 4003, so YMMV.
No cabs needed here, as I run my RH450 direct to FOH or my Bose L1 Model II.