Crown Audio CTD-4125 4 Channel Power Sharing Amplifier
The Crown CTD-4125 four-channel amplifier delivers flexible 500W power sharing, integrated DSP, Dante networking, Lo-Z/Hi-Z support, and compact installation options for professional installed audio environments.
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Description
Crown CTD-4125 four-channel DSP network amplifier
The Crown CTD-4125 is a versatile four-channel Class-D amplifier designed to meet the requirements of modern installed audio systems. Delivering 125 watts per channel when all outputs are driven equally, the amplifier also supports advanced asymmetrical power sharing, allowing the full 500 watts of available power to be allocated across channels in virtually any ratio. This flexibility makes it suitable for a wide range of commercial, educational, hospitality, and corporate audio installations.
Equipped with integrated 24-bit DSP operating at 48 kHz, the CTD-4125 enables precise speaker optimization, room tuning, and system configuration. Built-in processing supports custom loudspeaker tuning while factory JBL SpeakerTunings simplify deployment with compatible JBL loudspeakers. The amplifier also incorporates source priority switching, pilot tone monitoring, and load monitoring capabilities to enhance system reliability and operational control.
Dante and AES67 networking support allows seamless integration into networked audio infrastructures, providing flexible signal distribution and system expansion. The intuitive web-based configuration interface enables setup and management from computers or tablets without requiring proprietary software installation. Native compatibility with HARMAN HControl protocol further simplifies integration with compatible control and automation systems.
The CTD-4125 supports both low-impedance and constant-voltage loudspeaker systems through switchable Lo-Z and Hi-Z outputs. Its compact 1RU half-rack design allows installation in equipment racks, under tables, or on walls using the included mounting hardware. Combining efficient Class-D amplification, advanced DSP, network connectivity, and flexible power distribution, the Crown CTD-4125 provides a scalable solution for diverse professional audio applications.
Features of CTD-4125
- Four-channel Class-D amplifier design
- 125W output per channel
- 500W total shared power capacity
- Asymmetrical power sharing architecture
- Dante audio networking support
- AES67 network compatibility
- Integrated 24-bit DSP processing
- Custom speaker tuning capability
- Factory JBL SpeakerTunings included
- Lo-Z and Hi-Z output switching
- Web-based configuration interface
- No proprietary software required
- Source priority switching
- Pilot tone monitoring
- Loudspeaker load monitoring
- GPIO control interface
- HControl protocol integration
- Compact 1RU half-rack design
- Rack, wall, or under-table mounting
- Professional installed audio optimization
Specifications of CTD-4125
| Model | CTD-4125 |
| Amplifier Channels | 4 |
| Amplifier Class | Class-D |
| Form Factor | Rackmount (1RU, Half-Rack) |
| Power Output (Per Channel) | 4 × 125 W at 4/8 Ohms |
| Power Output (Single Channel) | 1 × 500 W at 4/8 Ohms |
| Power Output (70/100V) | 1 × 500 W |
| Load Support | 4/8 Ohms, 70V, 100V |
| Frequency Response | 20 Hz to 20 kHz ±0.5 dB |
| Damping Factor | ≥100 |
| Signal-to-Noise Ratio (Analog) | 104 dB |
| Signal-to-Noise Ratio (Dante) | 113 dB |
| THD+N | ≤0.1% |
| IMD | ≤0.35% |
| Crosstalk | > -90 dB (20 Hz to 1 kHz) |
| DSP Processing | 24-Bit DSP at 48 kHz |
| Analog Inputs | 4 × Block 3-Pin |
| Analog Outputs | 2 × Block 4-Pin |
| GPI Input | 1 × Block 6-Pin |
| Fault Logic Input | 1 × Block 3-Pin |
| Network Ports | 2 × RJ45 AES67/Dante |
| Digital Audio I/O | None |
| USB Connectivity | None |
| Phantom Power | No |
| Wireless Connectivity | No |
| Input Power | 100 to 240 VAC, 50/60 Hz |
| AC Connector | IEC 15A / NEMA 5-15 |
| Display | Single LED Indicators |
| Cooling Method | Convection |
| Dimensions | 14.1 × 8.6 × 1.75 in (358.1 × 218.4 × 44.45 mm) |
| Weight | 7.1 lb (3.2 kg) |
| Package Weight | 10 lb |
| Package Dimensions | 15.5 × 7.5 × 4 in |
| Mounting Options | Rack, Wall, Under-Table |
| Configuration Interface | WebUI |
| Monitoring Features | Pilot Tone and Load Monitoring |
| Control Protocol | HControl |
Customer Reviews
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