CROWN NXFMR4CH - Four-channel transformer (XFMR-4)

CROWN NXFMR4CH - Four-channel transformer (XFMR-4)

The CROWN NXFMR4CH is a 19″ rack-mountable, four-channel transformer designed to match the impedance between constant-voltage (70 Vrms and 100 Vrms) amplifier outputs and speaker systems. Ideal for distributed installations, it allows amplifiers without a direct 70 V or 100 V output to drive speaker networks designed for those voltages using the included jumper cables. Its rugged construction, wide frequency response, and low losses ensure professional audio performance and fast, reliable installation.

Main features

• Four impedance matching channels for 70 Vrms and 100 Vrms operation
• Pre-installed jumper cables for direct connection to DriveCore™ amplifiers
• Removable block connectors compatible with wire up to 14 AWG
• Frequency response 70 Hz–15 kHz ±1 dB
• Insertion loss ≤ 1 dB at 70 VAC
• Maximum input signal 32 Vrms (equivalent to 125 W)
• Rack dimensions 19″ × 1.72″ (4.4 cm) × 15.6″ (39.7 cm)
• Net weight 7.7 kg

Product benefits

• Agile integration: 1U mounting and jumper cables make setup easy without the need for additional tools.
• Versatility: Converts any amplifier into a 70V or 100V source, expanding its use possibilities in distributed installations.
• High Fidelity: Passive design with minimal loss and stable response for clear sound reproduction.
• Professional ruggedness: Metal housing and quality connectors withstand demanding environments.

Use cases

• Public address and emergency announcement systems in public buildings.
• Loudspeaker networks in shopping malls, airports, and transportation stations.
• Audio installations in educational centers, auditoriums and conference rooms.

Frequently Asked Questions

• Does it work with any amplifier? Yes; for 70V or 100V output, it is recommended to use with ComTech DriveCore™ amplifiers.
• Does it require an external power supply? No; it operates passively using the amplifier signal.
• What wire gauge does it support? Connectors compatible with up to 14 AWG (approx. 2–6 mm²).

Description for projects

Four-channel, 1U rack-mount transformer for 70 Vrms and 100 Vrms constant-voltage systems; jumper cables included; removable connectors for wire up to 14 AWG; response 70 Hz–15 kHz ±1 dB; loss ≤ 1 dB; maximum input 32 Vrms; dimensions 48.3 × 4.4 × 39.7 cm; weight 7.7 kg.