The Guyatone FR-3000V features Accutronics 4AB3C1B long reverb tank. Each reverb unit is Loaded with New Old Stock GE 6K6GT, JAN GE 5751, and JAN GE 12AT7WC tubes, tested and burned in prior to loading. Reverb Level control determines degree of reverb effect. Individual Bass and Treble controls allow for precise tonal control over the reverb signal. Individual Level and Master Volume controls allow for a wide variety of saturated reverb tones. Direct Bypass switch allows for Dry/Reverb mix or Reverb only output signals. Remote bypass using optional footswitch (Guyatone SB-2 recommended). Dual front/rear inputs allow for mounting in rack or road case. 20"W x 7-1/2"H x 9-1/2"D. 18 Lbs. 3-year parts and labor warranty.