Well...depends on what kind of dimensions you are talking about. Fully cranking the volume on the amp produces everything from clean and shimmery (low-mid volume on the guitar) to dirty and sustaining (3/4 to full volume).....the volume on the guitar effectively becomes the "Gain" control, and the tone controls the high cut.

The external tube screamer will give this amp the Nirvana quality. It's hard to describe why I love this amp so much without giving a live demo.

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