Crown XFMR8
Trans Panel Constant Voltage


The Crown® XFMR-4 is a rack-mountable transformer to provide impedance matching between amplifier outputs and “constant voltage” loudspeakers. This unit allows amplifiers without direct 70V or 100V output capability to drive distributed speaker systems designed to operate at those voltages.


  • Transformers provide four and eight channels of impedance matching for constant-voltage operation.
  • Provides 70V and 100V output when used only with Com-Tech DriveCore (CT 475, CT 875, CT 4160, and CT 8150).
  • Allows amplifiers without direct constant-voltage capability to be easily integrated into distributed systems.
  • "Jumper" cables are provided to easily integrate the XFMR unit with a Com-Tech DriveCore amplifier


  • Output connectors: Pluggable barrier block connectors that accepts up to 14 AWG wire.
  • Frequency Response: +/– 1.0 dB (70 Hz to 15 kHz).
  • Insertion (Core) Loss: <1.0 dB max (70VAC).
  • Max Input Levels: 32 Vrms / 125W.
  • Dimensions:
      -  19 in (48.3 cm) wide
      -  1.72 in (4.4 cm) high
      -  15.6 in (39.7 cm) deep
  • Weight: 23.6 lbs (10.7 kg)
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