A-100 Series Hammond Organ Specifications *Dimensions: Without pedal board and music rack, 47 ½" wide, 25" deep, and 38 ½" high; with pedal keyboard and music rack, 47 ½" wide, 43" deep, and 45 ½" high. Weight: Complete with bench and pedal keyboard-381 pounds Manuals: Swell and Great, 61 keys each Pedal Keyboard: 25-note, radiating, detachable Tonal Controls: 9 Pre-set keys and two sets of 9 adjustable harmonic drawbars for each manual. The power amplifier with two-12" speakers and the built-in reverberation system with its own 12" speaker provide true response down to the lowest pedal tones-all within one, compact console Expression: One Expression pedal, controlling Swell, Great, and Pedals; also equipped with normal and soft volume control Vibrato: Equipped with Hammond Selective Vibrato which provides three degrees of true vibrato and three degrees of Vibrato Chorus, on the upper manual or the lower manual or both simultaneously The Hammond A100 Series has identical tonal resources to the B3 and C3 Hammond Series models.  The main differences: the A100 includes a power amlpifier with two direct channel 12" speakers, reverberation system and 12" reverberation speaker-all within the console. *Dimensions may vary, depending on the style model of the A-100 Series. This would be of a very slight variance.