pedalboard was available as an optional extra. Dual-manual models also have a 5 1/3' drawbar on the upper manual, an octave of bass keys and a string bass feature. Later models also supported a percussion feature similar to that on a Hammond. The organ's sound comes from twelve oscillators, one for each note in the chromatic scale along the top octave of the instrument. The signal from each of these is fed into a frequency divider circuit that allows the frequency to be halved, in order to produce the sound an octave lower. This is then halved again for the subsequent octave, and so on down the rest of the instrument's range, except for the lowest note, C, which has a dedicated generator. Each key is connected to four contacts connected to ground; when a key is pressed, it makes a connection to the bus bar which sends a signal to the drawbars to produce a sound. The first Continentals were manufactured with wooden keys covered with plastic key caps. Musicians complained this gave it an unpleasant playing action. Later models switched to using plastic keys connected to metal shafts. History The Vox Continental was first manufactured by the Jennings Musical Instruments factory in Dartford, Kent in 1962. Most of the components for the organ were subcontracted to other companies, with Jennings working on the final assembly. The original cabinets were constructed by Heathpoint Timer in Rayleigh, Essex while some of the electrics were made by Kimber-Allen in Swanley, Kent. Jennings sold part of the company to the Royston Group in 1963. Production later moved to Vox Sound in Erith, Kent. The dual-manual Continental II was introduced in 1965. That same year, the single-manual model sold for $995 ($ in ). The Vox Jaguar was introduced as a budget version of the Continental the following year, retailing at $495 ($ in ), which used rocker tabs instead of drawbars. Only fundamental frequencies could be produced on the Jaguar, as it lacked the circuitry to generate additional harmonics like the Continental. The tabs allowed a choice of "flute", "bright", "brass" and "mellow", a "bass chords" option and the vibrato as found on the Continental. The bottom octave could be switched to a monophonic sub-octave bass generator, which was routed to a separate audio jack. Though the Jaguar superficially resembled the Continental, the sound was significantly different. However it was still popular,