The “Tone” Control – The inclusion of this obscure feature demonstrates the commitment to authenticity Hammond has brought to the Sk Series. Inside the Vintage Hammond B-3, on one side of the tube preamp, there was a “Screwdriver Pot” with the engraved legend “Tone”. This control was adjusted by the Technician installing the organ in order to tame the treble response in the instance of the organ’s installation in a Church or Mortuary, where a more muted organ was desired. The control was a cocktail of upper Mid and High frequencies (the proportions of which were, until recently, held secret. The “Tone” control was basically a “hi cut” control and only went “down”. You could not direct the control to go “up” for “boost”. The TONE control is included in the Sk’s menu with the added benefit of being able to BOOST the unique blend of frequencies, which adds a nice “edge” to the Sk tone, if desired.

Digital Leslie – Chicago Engineer/Inventor Don Leslie bought a Hammond Organ not long after its introduction in 1935, but felt the instrument lacked the warmth of the Mighty Theatre Pipe Organs he so loved. The main difference between Church Pipe Organs and Theatre Organs was the deep Tremulant that took the edge off the Theatre Organ’s pipes and made them emotionally “sob”. Making use of an acoustic phenomenon called the “Doppler Effect”, Mr. Leslie constructed a speaker cabinet that used a simple system of rotating horns and baffles to give the Hammond tone “motion” and “depth”. This created a different instrument altogether, one that could play “Popular” music. Mr. Hammond intended his organ for the Church and Classical Music, looking at “Popular” Music with disdain-he wanted nothing to do with Mr. Leslie’s invention when Mr. Leslie demonstrated it. The public however, took the combination of Hammond and Leslie to heart, and so it remains to this very day. It is difficult to think of one without the other, although Mr. Hammond never allowed Hammond Dealers to sell Leslie Speakers. After Mr. Hammond’s death, the two companies became partners, and now Hammond owns and manufactures Leslie Speakers. For both Hammond and Leslie, the golden goal was to produce a Leslie that did not require motor-driven speakers, and the goal has been reached in the Sk series, with the finest Digital Leslie we have ever produced. Now the elusive effect can be had where space and mobility have heretofore denied it. As an added benefit to being produced in the Digital realm, many aspects of the effect can be adjusted and tailored to ones own taste and requirement. Slow and Fast Rotor speeds, “Ramp Up” and “Ramp Down” speeds, Speaker Size, Amp type, Virtual Mic Placement and other parameters may be combined into “Cabinet” Macros which then may be assigned to any Organ Preset. In addition, 8 factory Cabinets, comprising the most popular Leslie Models like the 122, 147, 760, Vintage 31-H, and others are available for instant choice. There is even a model of the original PR-40 (Non-Rotating) Hammond Factory Tone Cabinet. A button on the Control Panel allows the bypass of the Digital Leslie circuit and sends the Organ tones directly to the Stereo Outputs