I posted this on Harmony Central, but I didn't really get the answers I was looking for, so I figured I'd post this here too. As I've stated in other threads here, I took up bass solely for recording purposes, and because of this I don't have an amp. I practice direct through a Presonus Firebox going into studio monitors. I've found that playing direct can get great clean tones for bass, but as of yet, I've been unable to get a decent distortion sound. So I've been looking into ways to get the best distortion sound possible while playing direct. My latest idea to do this, is to use a small tube guitar amp plugged into a power attenuator, with the attenuator sending a signal through a line out into a line in on my Presonus Firebox. The signal path would be like this: Fender P-Bass -> 1960s Fender Vibro Champ -> WeberVST Power Attenuator (Line Out) -> Presonus Firebox Line in By setting the power attenuator at maximum, no signal will go to the guitar speaker, so it won't get damaged. So the end result will be a tube amp overdriven sound as a direct signal. This should produce a fantastic tone, but I've never heard of anyone doing this with bass. So my question is, has anyone ever tried anything like this? I figure with a setup like this, I'll be able to get both good clean and overdriven tube sounds. My only concern so far is that using a guitar amp may have a negative impact on the overall tone. I'm not sure how much of an actual difference it will make though.