Greg Clinkingbeard
Commercial User
Just my two cents: I used to have a LMII, which is a killer amp with electric bass, but sounded terrible with both my double bass and EUB (NS Design). Now I'm using an Acoustic Image Contra, which sounds wonderful with both DB and (especially when hooked to my 2x10 Nemesis speaker) Electric bass...
Although there are amps that generally sound better than others on DB, I don't think it can be said that 'this one is great but this one sucks'. The bass, strings, pickup, amp and cabinet all work together in making the sound that the player and audience want to hear. Of course, the sound in the player's head down through the body and fingers are essential.
There are some really fine jazz players in town using Polytone, GK, Ampeg Portabass, Acoustic Image, Walter Woods, SWR, yada, yada, yada. They all generally sound very good. A good friend uses a Contra with an old German bass/Full Circle or a Polytone with a Rodier/Realist. That works for him. I will know in a few days if this setup is better for me.