© 2004 Wohler Technologies Inc. ALL rights reserved
6
AMP2-VSDA/AV
and
AMP2-VSDA/AM
User Manual P/N
821576
Rev-
B
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Installation
Mounting
The unit should be mounted where convenient for operating persons, ideally at approximately ear/eye level for best high frequency
response and visual observation of the level meters. Its superior magnetic shielding eliminates concerns about locating it adjacent
to most types of CRT monitors, including even high-resolution color monitors.
Heat Dissipation
Heat dissipated by the speaker amps is conducted directly to the left side of the chassis; no special considerations for cooling are
necessary as long as the ambient temperature inside the rack area does not exceed approximately 60°C (140°F).
Sympathetic Vibration
Sympathetic vibration from other equipment (cables, etc.,) in the rack may be serious enough to interfere with the unit’s sound
quality out in the listening area. The use of thin card stock and/or felt or foam weather-stripping type materials between adjacent
vibrating surfaces, or tying up loose cables, etc., may be required to stop vibrations external to the unit.
Mechanical Bracing
Even though the unit is fairly heavy, the chassis is securely attached to the front panel at eight points along its surface, not just at
the four corners of the chassis ears. This feature will reduce or eliminate rear bracing requirements in many mobile/portable
applications. The weight of internal components is distributed fairly evenly around the unit.
Audio Connections
Connection of the audio feeds is straightforward. Please refer to the system interconnect block diagram on page
24
for clarification of the
general signal paths into and out of the unit.
AES/EBU inputs are via female BNC or 3-pin female XLR connectors. Digital BNC inputs are configured for 75
Ω
unbalanced
connections; digital XLR inputs are configured for 110
Ω
balanced connections. Analog inputs are via four 3-pin female XLR
connectors. Analog inputs are configured for 70K
Ω
balanced connections. Care should be exercised to avoid mismatched cable types
and other similar causes of undesired reflections in RF signal systems. If severe enough, such reflections can result in corruption of the
digital datastream.
AC Power
The unit's AC mains connection is via a standard IEC inlet, with safety ground connected directly to the unit's chassis. The
universal AC input (100-240VAC, 50/60Hz) switching power supply is a self-resetting sealed type, with automatic over-voltage
and over-current shutdown. There is no user-replaceable fuse in either the primary or secondary circuit.
Section 1:
Features, Specs, and Installation
