Crown XFMR4 4 Channel Rackmount 70V Transformer

The Crown XFMR4 is a purpose-built 4-channel rackmount transformer kit that bridges Crown's CT DriveCore amplifier platform with 70V distributed audio systems. In commercial audio installations — such as retail stores, restaurants, office buildings, and houses of worship — 70V constant-voltage distribution is the standard method for running long speaker cable runs to multiple ceiling or wall-mounted speakers. The XFMR4 takes the low-impedance output from a four-channel Crown CT DriveCore amplifier and steps it up to the 70V level these systems require, all within a single rackmount chassis that sits cleanly alongside the amplifier in a standard 19-inch equipment rack.

By consolidating the voltage conversion at the amplifier rack rather than requiring individual transformers at each speaker, the XFMR4 simplifies wiring and system maintenance for installers. It is engineered specifically for Crown CT DriveCore amps, so impedance matching and power handling are optimized for that platform — but this also means it cannot be repurposed with other amplifier brands or series. For AV integrators already committed to the Crown DriveCore ecosystem, the XFMR4 provides a clean, professional path to 70V distribution without needing to source a separate amplifier with native constant-voltage output.