I'm new to Marshall (except listening to them and salivating over the hard rock years). I have a JCM800 combo model 4210. It is 2 channel. It's definitely different distortion to use the gain and master volume on Channel Two than to just turn Clean Channel One up until it distorts. My question: Talking about only the clean channel, does it operate on basically the same principle as did an old 1970 Marshall one-channel, non-master volume amp? It may sound different of course because of electronics, etc., but is Channel One on my 4210 just a regular old Marshall channel, or is it designed to be CLEAN moreso than an old 1970, ---which was just designed to be an amp...you know what I mean? I'm probably not explaining it too well.