Crown D-45
Crown D-45

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

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Magna-Tech Electronic Co., Inc.
6114 NW 74th Ave.
Miami FL 33166 USA
Phone: (305) 573-7339
Fax: (305) 573-8101
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