CROWN XFMR-4 - Four-channel transformer

CROWN XFMR-4 - Four-channel transformer

The CROWN XFMR-4 is a four-channel, 19″ rack-mount transformer that matches the impedance between amplifier outputs and constant voltage (70 Vrms and 100 Vrms) speaker systems. Jumper cables are included for quick integration with ComTech DriveCore™ series amplifiers, allowing non-direct output 70 V or 100 V units to drive distributed speaker networks. With a wide frequency response, low losses, and rugged construction, the XFMR-4 optimizes performance and facilitates professional sound installations.

Main features

• 4-channel transformer for constant voltage operation
• 70 Vrms and 100 Vrms output when used with ComTech DriveCore™ amplifiers
• Jumper cables included for easy connection
• Removable block connectors that accept wires up to 14 AWG
• Frequency response: ±1.0 dB between 70 Hz and 15 kHz
• Insertion loss ≤ 1.0 dB (at 70 VAC)
• Maximum input signal: 32 Vrms (125 W equivalent)
• Rack dimensions 19″ × 1.72″ (4.4 cm) × 15.6″ (39.7 cm)
• Weight: 7.7 kg

Product benefits

• Quick Integration: Pre-installed jumper cables make it easy to connect to DriveCore™ amplifiers.
• Versatility: Allows the use of any amplifier in 70V or 100V distributed speaker installations.
• High Fidelity: Stable response and minimal loss ensure professional audio quality.
• Standard mounting: 1 U format for installation in 19″ racks.
• Robust construction: Quality components and design designed for demanding environments.

Use cases

• Audio installations in shopping malls, airports, and offices with a speaker network.
• Public address and emergency announcement systems in public buildings.
• Sound distributed in educational centers, event halls and auditoriums.

Frequently Asked Questions

• Does it work with any amplifier? Yes, but for 70V or 100V output, it must be used with ComTech DriveCore™ amplifiers to ensure the reference voltage.
• Does it need external power? No; it works passively with the amplifier signal.
• What wire gauge does it support? Connectors accept up to 14 AWG (approximately 2 mm²–6 mm²).

Description for projects

Four-channel 1U rack transformer, impedance matching for 70 Vrms and 100 Vrms systems, removable block connectors for cable up to 14 AWG, response 70 Hz–15 kHz ±1 dB, insertion loss ≤ 1 dB, maximum input 32 Vrms, dimensions 48.3 × 4.4 × 39.7 cm, weight 7.7 kg.