Since most of the years I have played I have found that tone is in the fingers and the ear of the player. Most of the time, regardless of the amp or it's volume concerns, every one I have ever played through sound like me. I don't think tone is involved in anything that can be defined as simply as an amp, guitar, and pedal. For example, listen to Robert Johnson. Played some of the cheapest guitars, and recorded over really elemental gear and every time I hear him I am just knocked out at his tone and articulation. Clapton sounds like Clapton regardless of the amp he plays through. He still has the tone of Clapton.