Ashly PowerFlex 470 Руководство по эксплуатации - Страница 5

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CABLE REQUIREMENTS

4.1

Input Cables

Be sure to use shielded cable whether balanced or

unbalanced. Shielding which is properly grounded will

protect the signal from outside electrical interference such

as RF, fluorescent lighting, and computer/display emis-

sions. As a general rule, unbalanced or single-ended (tip-

sleeve) lines of less than 10 feet are satisfactory, but greater

distances or noisy field environments require a balanced

signal. Avoid running input lines in close proximity or

parallel to long speaker lines, AC power cables, or power

transformers, as this may generate hum or oscillation.

4.2

Output Cables

It is recommended that the 70V speaker lines be

terminated with spade lug terminals for connection to the

powerflex amplifier's output screw terminals. Alterna-

tively, bare stripped wire leads may be wrapped around

the output screw terminals. The output screw terminals

will accept spade lugs or stripped wire for wire sizes 10 to

22 gauge.

: T

AUTION

ERS CAN PRODUCE DANGEROUS VOLTAGE LEVELS AT

THE OUTPUT SCREW TERMINALS

THE AMPLIFIER BEFORE CONNECTING OR DISCON

. T

NECTING OUTPUT WIRES

ALWAYS BE OPERATED WITH THE SCREW TERMINAL

SAFETY COVER SECURELY IN PLACE

Operating Manual - Powerflex Multi-Channel 70V Power Amplifier

70V

OWERFLEX

AMPLIFI

. A

LWAYS UNPLUG

HE AMPLIFIER SHOULD

RACK-MOUNTING REQUIREMENTS

5.1

Mechanical

Powerflex amplifiers are designed to fit in stan-

dard 19-inch equipment racks. The front panel rack-mount

ears are sufficiently strong for most applications, however

if you desire further support, we recommend using the four

additional holes in the back of the chassis for supplemen-

tal rear-mounting (see dimensional drawing for details).

5.2

Cooling

Be certain that both the front and back of the rack

have unhindered access to free air flow. Fan direction is

from front to back. It is not necessary to leave empty space

above or below.

5.3

Grounding

In some installations where the sound system is

sensitive to RF noise or system-induced oscillation, it may

be necessary to ground the amplifier's chassis to the rack

enclosure. This is accomplished using star type

lockwashers on the four rack mounting screws. These star

washers will penetrate through the amplifier's paint to ad-

equately ground the chassis to the rack.