Classic Tube is an alternative to the Ibanez Tube screamer because it is not as harsh, and has better low end response. The Fx 53 Classic Tube duplicates the warm, smooth distortion and long, singing sustain and harmonics of the early 60s amp stacks. Has the following controls: Volume, Tone, and Drive, which adjusts the amount of distortion. This knob has a boost in the high position.
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