I realize the tube vs solid state threads have run their course, but I am more interested in a direct comparison between these two specific amps. They both seem to be popular around here and I am seeking input from those who have played or own both. I might throw the class-D Bassman 500 in the comparison mix to the V-4B as it has the same power module as the Rumble, too. I have been gigging with a Rumble 500 v3 head successfully, but have a curiosity around tube heads (especially since recently acquiring a used Ampeg 8x10 cabinet). What attracts me to the V-4B is its simplicity and sound (based on the demos I have heard), yet it can run between 2 and 8 ohms and has a DI onboard. How would a modern V-4B with the master at full volume and the input gain around half (slight breakup sound) compare to the output of a 500 watt Rumble with both the input gain and master at noon, if ran through the same cabinet with the same bass (let's say a passive P or J bass; that's what I use)? I typically "set and forget" my Rumble's master at noon on gigs, adjusting my cabinet choice to the venue (single 1x15, two 2x10; haven't gigged the 8x10 yet, but I presume I can set the volume lower with that....).