The Orange Crush 20RT is Oranges ultimate practice amp. It has a built-in tuner and internal reverb and the Crush 20RT couldnt be more usable.Its punchy and dynamic tone comes in part thanks to its custom Orange-designed Voice of the World 8" speaker. This, combined with all-analogue circuitry means that all of the components are at the highest possible quality. The perfect practice amplifier for the discerning guitarist.It has a twin channel, high gain preamp design with plenty of great tonal options, from crispy clean, to Oranges signature bluesy tube-like crunch, and an ultra-saturated high-gain metal sound without losing richness and clarity. Switch between clean and dirty channels through the amps top panel or through the optional footswitch.The 3 band EQ and Gain knob allow you to get a variety of Orange tube amp tones. The Orange Crush 20s custom 8" Voice of the World speaker to deliver a modern low-end punch and vintage highs, and the unique Cab-Sim feature on the headpho