When were the ULXP4 receiver and all ULXP systems discontinued?
August 2014. The ULXS4 receiver and the ULXS systems were NOT discontinued
The final U.S. retail price for the ULXP4 receiver was $770. It can be replaced by the ULXS4 receiver for most applications.
The ULXP4 was introduced in 2002.
Differences between ULXP and ULXS: