Hi, i have a question on preamps.. I want a type of distortion on my amp but it just does not seem to have it.. Right now im using the Eden Nemesis NC410 combo, but at times i would like to be able to switch to a tube overdriven sound. Im kind of refering the sound to the sound that Cliff Burton got on his bass solos. Now my question is, what preamp should i run through my amp i have now in order to achieve this sound? Also, im kind of looking for something inexpensive, for i have no income right now. Also, I would like to keep the sound that i have going through the amp its self, but when needed, i could hit a switch or something, and switch to the distortion. Would a preamp be able to do this, or is there something smaller that would be just as easy, and less expensive? Thanks.