Opus 94

In the 1970s, the Instituto Politécnico Nacional ceded its rights to 94.5 FM to the Secretariat of Public Education so the SEP could move Radio Educación (XEEP-AM) to FM. However, the money was not available for the SEP to build out the station, and so the proposal was stalled.[2]

The Opus format began on 710 AM (XEMP) in 1983. That same year, 94.5 FM, the last full-power FM frequency available in Mexico City, was put up to attract noncommercial permits. Several groups — the IPN and IMER among them — jockeyed for the station, with IMER winning. Opus moved to the new 94.5 XHIMER-FM on July 4, 1986, when 50 kW transmissions commenced.[3] The station received authorization for a power boost to 100 kW in 1991, but IMER was not able to install a transmitter capable of outputting 100 kW until 1999.

On April 13, 2023, as the result of a lapse in renewing the concession for XHIMER-FM, the station began operating on a new concession with new XHCPDO-FM call letters.

Opus 94 primarily broadcasts classical music. The station broadcasts concerts of the Mexico City Philharmonic Orchestra.

The station broadcasts in HD Radio;[4] this transmission was formally launched on September 17, 2012. Its HD2 signal is co-owned XEB-AM and its HD3 was Jazz Digital, which became silent in mid-2019.