can you get a decent modern, somewhat hifi sound from a rumble 40? i tried a couple in guitar centers and one at a sam ash store, but the stores were very noisy, and the sam ash had it set up so it was playing directly into my face, so i'm not sure what was going on. i know a lot of people recommended it to me, and it's got some good features and is very light weight. i tried a rumble 25 yesterday at a quieter guitar center with a dedicated bass room. sounded good with some basses but not too good with others. i also tried a rumble 100, which actually weighs the same as the rumble 25. it could have been the room and location, but mostly it seemed like i got a muddy sound except when the bass was cranked all the way down, but while it does have an fx loop, which i like, i have a head with an fx loop and i'm looking for a lightweight, small amp that won't need to get above livingroom volume. so, can the rumble 40 deliver a fairly modern, less bass heavy tone with a more articulate sound?