AMPLIFIERS

Crown D-45

Introduction
Features
Specifications

Introduction

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.

Features

Specifications

Introduction
Features
Specifications

Features

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.

Introduction

Specifications

Introduction
Features
Specifications

SPECIFICATIONS

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
THD	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

Crosstalk	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