Boss SD-1 Boss SD-1 Overview: Boss SD-1 Super Overdrive The SD-1 produces the warm, smooth distortion of an overdriven tube amplifier while maintaining the subtle nuances of your picking technique. BOSS' unique asymmetric overdrive circuitry delivers a genuine overdrive effect for a classic guitar sound. A Tone control is also provided for precise tonal adjustment. Warm, Tube Drive Sounds. Uses BOSS' asymmetric overdrive circuitry for warm, smooth overdrive sounds that respond to your picking style just like a tube amp. Includes a Tone control to dial in just the right sound. Boss SD-1 Specifications: Input Impedance 470 k ohms Output Impedance 10 k ohms or greater Connectors INPUT Jack, OUTPUT Jack, AC Adaptor Jack (DC 9 V) Power Supply DC 9 V: Dry Battery 9 V type (6F22/9 V), AC Adaptor Current Draw 6 mA (DC 9 V) Accessories Dry Battery 9 V type (6F22/9 V) Option AC Adaptor (PSA-Series) Size and Weight ( incl. battery ) Width 73 mm 2-7/8 inches Depth 129 mm 5-1/8 inches Height 59 mm 2-3/8 inches Weight 0.4 kg 0 lbs. 15 oz. * 0 dBu = 0.775 Vrms * The specifications are subject to change without notice. Get your Boss SD-1 today!