The D-45 and D-75A are perfect for moderate power applications such as recording or broadcast studio near-field monitoring, video suite audio monitoring, a recording/broadcast headphone amp or a small paging system. Designed, built and carefully checked to ensure reliable operation with a wide variety of loads, Crown D Series amplifiers are convection cooled. Their high reliability is particularly important in reducing maintenance costs.

Your dual-channel (stereo) amplifier can optionally be configured to deliver double the power from a single (mono) channel. It also provides the following features:

  • Powerful AB+B class circuitry yields maximum efficiency with minimum crossover “notch” distortion.

  • IOC® (Input/Output Comparator) alerts of any distortion that exceeds 0.05% to provide proof of distortion-free performance.

  • Signal presence indicators verify the presence of amplifier output.

  • Detented level controls for precise repeatability.

  • Ultra-low harmonic and intermodulation distortion result in the best dynamic transfer function in the industry.

  • Very low noise and wide dynamic range.

  • High damping factor provides exceptional loudspeaker motion control.

  • Convection cooling system eliminates fan noise and maintenance.

  • Mounts in a standard 19-inch (48.3-cm) rack.

  • Front-panel headphone jack.


Frequency Response

+/- 0.1 dB from 20 Hz to 20 kHz at 1 watt

Phase Response

+10 to -15 degrees from 20 Hz to 20 kHz at 1 watt

Signal to Noise

106 dB from 20 Hz to 20 kHz at full bandwidth FTC power


Less than 0.001% at full bandwidth FTC power from 20 Hz to 400 Hz increasing linearly to 0.05% at 20 kHz

Intermodulation Distortion

(60 Hz and 7 kHz 4:1) Less than 0.01% from 0.25 watts to full bandwidth FTC power, and less than 0.05% from 0.01 to 0.25 watts


Greater than 100 dB below full bandwidth FTC power from 100 Hz to 1 kHz decreasing linearly to 80 dB at 20 kHz

Damping Factor

Greater than 400 from DC to 400 Hz

Controlled Slew Rate

6 volts per ms. (Slew rates are limited to useful levels for ultrasonic/RF protection)

Voltage Gain

At maximum level setting, 8-ohm load, 0.775V input sensitivity

Load Impedance

Safe with all types of loads. Rated for 4 to 16 ohms in dual mode, and 8 to 16 ohms in bridge-mono mode

AC Line Voltage and Frequency Configurations Available

100, 120, 220 and 240 VAC (+/-10%), 50 to 400 Hz for international units (depending on the transformer configuration). North American 120VAC, 60 Hz units are not convertible and con only be used at the specified voltage and frequency. All units draw 15 wa

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