Very similar feature-wise to the E-70 and EX-2, the EX-1 featured a third solo keyboard which could be programmed with additional synthesizer voices. A pair of TX-III tone cabinets came standard with this instrument.
PASS voicing took technology from the GX-1 and incorporated it into a consumer model instrument. The ramifications revolutionized the organ industry. Instruments voices began evolving towards emulating the true orchestral instruments rather than theater organ equivalents.