Crown D Series Specifications download pdf (Page 12)

Page 12

D-45 / D-75A Power Amplifiers

Input Sensitivity: Configurable for 26 dB gain or 0.775

volt sensitivity (see Appendix A).

Output Connector:

Barrier block terminals and stereo

headphone jack. The headphone output is unpadded,

and in parallel with the main amplifier outputs.

Output Impedance: Less than 15 milliohms in series

with less than 3 microhenries.

DC Output Offset: 10 millivolts or less.

Output Signal

Dual: Unbalanced, two channel.

Bridge-Mono: Balanced, single channel. Channel 1

controls are active; channel 2 controls should be turned

down.

Protection

Input: The inputs have series resistance that provides

input overload protection. Controlled slew rate voltage

amplifiers protect against radio frequencies. The AC

line is fused to protect against excessive current draw.

Output: Instantaneous limiting protection for short cir-

cuits, open circuits and mismatched loads.

Turn-On:

Minimum thumps. Power-up is instantaneous

with no program delay.

Construction

Durable black finish on aluminum front panel with gray

suede Lexan insert. Aluminum chassis provides maxi-

mum heat conduction and minimum weight.

Dimensions: 19 inch (48.3 cm) rack mount width,

1.75 inch (4.5 cm) height, 8.5 inch (21.6 cm) depth

behind the mounting surface, and a 0.625 inch (1.6 cm)

protrusion in front of the mounting surface

Approximate Weight:

D-45:

8 pounds, 11 ounces (3.9 kg) net; 10 pounds,

9 ounces (4.8 kg) shipping weight.

D-75A:

9 pounds, 7 ounces (4.3 kg) net; 11 pounds,

4 ounces (5.1 kg) shipping weight.

Cooling: The amplifier is totally convection cooled. The

entire aluminum chassis acts as a conductor to dissi-

pate heat. The covers and front panel extrusion also

act as heat sinks. Much of the unit’s heat is conducted

through the extruded front panel. This design is used

so that front panel contact with the equipment rack will

also dissipate heat.

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Crown D Series Specifications Page 12

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