Orange OB1-500 With NYC Case - UsedThe Orange OB1 500 uses a unique bi amp design. This allows the clean signal to come through while allowing harmonic distortion to be applied in separate signal path. They are then combined at the output with a blend control knob. It's perfect to keep the low end content present even at high gain settings. This Orange OB1 500 is in very good condition and is mounted in an NYC case.