In order to do this, Marshall designers connected the two input stages in series rather than parallel on the 2203, but not initially on the 2204, and modified the gain stage circuitry to preserve the tonal characteristics of the 'cranked Plexi' sound and converted the now obsolete second channel volume control to a Master Volume by wiring it between the preamp and EQ circuit. This was an attempt to control the volume level of the amplifiers whilst maintaining the overdriven distortion tones that had become synonymous with the Marshall brand. Most of these had Marshall layout and components, though some unusual amplifiers were made, such as a 75 watt keyboard amplifier with tubes. Starting in early 1965, Park produced a number of amplifiers including a 45-watt head. For instance, often the Parks had silver or black front panels instead of the Marshall's gold ones, some of the enclosures were taller or shaped differently, and controls were laid out and labeled differently.
To comply with his contract stipulations, these amplifiers had minor circuit changes compared to the regular Marshalls, and minor changes to the appearance. Marshall's contract did not prevent him from building amplifiers outside the company, and so Marshall launched the Park brand name, inspired by the maiden name of Jones's wife.
For export, they added 55% onto my price, which pretty much priced us out of the world market for a long time.' Park amplification The new contract had disenfranchised several of Marshall's former distributors, among them his old friend Johnny Jones.
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