Initially the top-of-the-line RCA color televisions, they would become lower-end as the Colortrak and Dimensia series were introduced (in the mid-1970s and early 1980s, respectively) The original models replaced the RCA "Vista" and "New Vista" color television series.
During later model years, the XL-100 line became the middle and then lower-priced color televisions in the RCA lineup.
RCA introduced the "Colortrak" in 1976 and toward the end of analog television, the "Dimensia" lines in the mid 1980s.
In later years, all three TV lines used the same RCA CTC-xxx (CTC is RCA's acronym for Color TV Chassis) chassis and the main differences were in cabinet design and electronic features.
The models sold in the early 1990s also had RCA jacks for composite video and stereo audio input accessed by tuning the TV to channel 91 and console models had remote control operation.