Crown D-45

The Crown D-45 is a two-channel stereo power amplifier delivering 20–35 watts per channel in stereo mode or up to 150 watts in bridge-mono configuration. Built on AB+B class circuitry with fanless convection cooling, it achieves exceptional audio fidelity with THD below 0.001% (20 Hz–400 Hz) and a 106 dB signal-to-noise ratio. The amplifier maintains ±0.1 dB frequency response from 20 Hz to 20 kHz and includes Crown’s IOC® distortion monitoring to ensure signal integrity during operation.

## Technical Specifications

**Audio Performance**
• Frequency Response: ±0.1 dB (20 Hz to 20 kHz at 1 W)
• Phase Response: +10 to −15 degrees (20 Hz to 20 kHz at 1 W)
• Signal-to-Noise Ratio: 106 dB (20 Hz to 20 kHz at full bandwidth FTC power)
• Total Harmonic Distortion: <0.001% (20 Hz–400 Hz), rising to 0.05% at 20 kHz
• Damping Factor: High for exceptional loudspeaker motion control
• Input Sensitivity (26 dB gain): 0.632 V (8-ohm load)
• Voltage Gain (maximum level, 8-ohm): 25.2 dB ±0.3 dB

**Output Power (1 kHz, ≤0.1% THD)**
• Stereo Mode: 20 W @ 16 Ω, 25 W @ 8 Ω, 35 W @ 4 Ω per channel
• Bridge-Mono Mode: 70 W @ 8 Ω, 150 W @ 16 Ω

**Physical & Electrical**
• Rack Format: 19-inch (48.3 cm) standard
• Cooling: Convection (fanless)
• Power Source: 100–120 VAC mains
• Fuse: 2 A type 3AG time-lag, low breaking capacity
• Circuitry: AB+B class

## Key Features

• IOC® Input/Output Comparator alerts when distortion exceeds 0.05%
• Ultra-low intermodulation distortion for superior dynamic transfer
• Detented level controls (Channel 1 & 2) for precise repeatability
• SIGNAL and IOC indicator lights for real-time monitoring
• Headphones jack on front panel

## Typical Applications

• Studio monitoring and near-field listening
• Video suite audio systems
• Small-scale public address installations
• Applications demanding minimal crossover distortion and clean reproduction

## Compatibility & Integration

• Input Connectors: XLR (balanced) and RCA (unbalanced)
• Output: Barrier block speaker terminals
• Channel-independent level control with front-panel accessibility