Xin Sound Tube Screamer Overdrive Guitar Effects Pedal Model: FS-808/FS-909 Tube Screamer Overdrive The Vintage Tube Screamer Pedal is the incomparable overdrive pedal that vintage gear hounds are always hoping to find. The FS-90 has warm tones of the JRC4558 chip used in most of the original Tube Screamer. The pedal has an overdrive knob, a tone knob, and a level knob. The drive knob controls the level of distortion, the tone knob adjusts the amount of treble in the sound, and the level knob controls the output volume of the pedal. The pedal can be used on a solid-state amp to try to mimic the sound of a vintage tube amp, although many guitarists prefer to use it to push a tube amp power amp into an overdriven state. Specifications * Controls: Level, Tone, Drive & True Bypass knobs on face, On/Off LED status indicator * Connectors: Input, Output, AC Adaptor * Classic 100% Analog circuits and handmade * Runs on 9 V battery or the 9V DC power supply * Current Draw: 4 mA (DC 9V) * Input Impedance: 470KOhm * Output Impedance: 1KOhm * Dimensions: 65(W) x 115(H) x 58(L) mm * Carton Size: 420 x 328 x 163 mm and 24pcs/Carton