Interesting to see that we're only starting to see a few examples of preamp + ACT cabs, since a lot of members are using preamps or modelers as their main gear, and want to find either a power amp + cab, or an active cabs, and there are not so many options available (very few power amps that work well for bass without the EQ controls of a full amp, and even fewer available powered cabinnets except GR Bass).
I know GR Bass stuff is pricey and difficult to find, but this combo SB Nobelium + GR ACT cab is seems to be killer, I'm sure a lot of us don't know about GR ACT cabs and would love this solution.
One thing I wonder though: in general, people in search of an active cab for their modeler or tube preamp want it to be "FRFR".
GR Bass don't use the term "FRFR" for their (active and passive) cabs, but they describe it as very transparent and uncolored.
Do you confirm it's actually very transparent?