So ideally I would like to eventually get a real nice bass tube amp to get a nice natural overdriven sound for my bass but I definitely can't afford one right now. Meanwhile I have a Vox AC4TV all tube 4w @ 16 ohm guitar combo amp with a 10" guitar speaker. It's all stock except I cut off a big piece of the back panel to make it an open cab. I have used it with my Fender Jazz bass in the past and it sounds pretty damn good just the way it is and I don't think that I have damaged the speaker at all as far as I can tell. I have a 5 string active bass now too with a low B and I have not tried that with it that yet. I'm thinking about getting a 10" bass speaker for it and maybe do some other mods to it to make it more bass friendly. Any thoughts or suggestions for me? Thanks.