The instrument
In 1974, CBS Musical Instruments decided to drop the Fender name from the Rhodes line. Aside from the branding, nothing changed about the construction of the Mark I. Throughout the late 70's the piano continued to be produced in 73- and 88-key configurations.
Details
Design changes began in 1975, with the first being molded all-plastic hammers. Harp supports were changed from wood to aluminum.The new FR7710 amp was now 100W stereo (2 x 50W), with pairs of 1/4" inputs and outputs for running the piano's signal to and from a mixing console.