CROWN CT 475 - Four-channel power amplifier, 75W @ 4Ω

CROWN CT 475 – Four-channel power amplifier, 75 W @ 4 Ω

The CROWN CT 475 is a four-channel professional installation amplifier delivering 75W per channel into 4Ω (and 75W @ 8Ω) in an ultra-compact 1U fanless chassis. Based on DriveCore™ technology, it integrates the drive and power stages onto a single chip for efficiencies over 90% without sacrificing the sonic quality of a highly evolved Class AB design. With universal power supply, passive convection cooling, and built-in human safety features, the CT 475 is ideal for environments where reliable, discreet, low-latency sound is required.

Main features

• Channels and Power: 4 channels of 75 W @ 4 Ω; 75 W @ 8 Ω
• Input sensitivity: 1.4 V for rated power
• Signal-to-noise ratio: 110 dB (A-weighted)
• THD: < 0.05% (20 Hz–20 kHz, full power)
• IMD: < 0.05% (SMPTE)
• Frequency response: ± 0.5 dB (20 Hz–20 kHz)
• Crosstalk: > 70 dB (20 Hz–1 kHz)
• Common mode rejection: > 55 dB (20 Hz–1 kHz), typically > 70 dB
• Voltage gain: 25 dB
• Input routing: Phoenix connectors or barrier block, signalable to any of the 4 channels
• Passive cooling: natural convection without fans, silent operation
• Universal power supply: 100–240 V AC, 50/60 Hz with active PFC
• Human safety: integrated emergency functions and life-safe certifications
• DriveCore™ Efficiency: >90% without compromising sonic character
• Protections: Patented feedback and current limiting circuits
• Load stability: stable for 2 Ω–16 Ω; requires XFMR 4/8 for 70 V/100 V

Product benefits

• High-fidelity sound: low distortion and wide frequency response for demanding environments.
• Discreet installation: 1U fanless chassis, ideal for conference rooms, shops and restaurants.
• Zero maintenance: passive cooling and long-lasting power supplies.
• Distribution flexibility: configurable channel-by-channel input routing.
• Energy Efficiency: DriveCore™ and PFC reduce operating costs and heat dissipation.
• Safety guaranteed: life-safe functions for public address and evacuation applications.

Use cases

• Background audio and ambient music in hotels, restaurants, and shopping centers.
• Public address systems and evacuation systems in airports and hospitals.
• Sound reinforcement for conference rooms, auditoriums, and multipurpose spaces.

Frequently Asked Questions

• Does it require external ventilation? No; its passive convection design effectively dissipates heat.
• How do you select 70V/100V? Using separately available XFMR 4 or XFMR 8 transformers.
• Does it support remote control? It has GPIO ports for integration with external management systems.

Description for projects

4-channel 75W @ 4Ω 1U rack amplifier, DriveCore™ >90% efficiency, passive cooling, 100–240V AC power, flexible routing, human safety, stable for 2–16Ω.