I have found that my Carvin BX1500 is wonderful with my Koa Carvin fretless six string. The bass has EMG active pickups installed. The amp drives a pair of Acme B2 2x10 cabinets one per output channel.
That said I still turn to my self designed full tube pre-amp driving a Carvin DCM1000L power amp through the same cabinets. This is the rig in my avatar. Except that my avatar seems to have disappeared!!

Ah That's better!
As I stack my cabinets vertically two take the same stage area as one so I always use a pair no matter the size of the gig.