Speck Electronics MicPre 5.0 - Manual (Page 11)

Installation
The following information should give you the basics on how to
install the MP 5.0. The proper installation of the MP 5.0 as part of
a larger system requires a clear understanding of audio wiring, AC
distribution, grounding, and shielding techniques.
When the MP 5.0 is being installed into a larger system it may be
necessary to retain the services of someone experienced in these
matters.
The MP 5.0 is delivered in a special, protective shipping container
and was carefully inspected both mechanically and electrically
before shipment. It should be physically free of mars and scratches
and in perfect electrical order upon receipt. To confirm this, the
product should be inspected for physical damage that may have
occurred in transit. Any damage should be reported to your
delivery company as soon as possible.
If installed in an equipment rack that also contains heat producing
equipment, adequate ventilation should be provided. This will
prolong component life and maximize operational stability.
To insure adequate airflow around the unit and to prevent
overheating, we recommend leaving a 1U blank panel above and
below the MP 5.0 and do not obstruct the air vents on the side.
While the internal circuitry of the MP 5.0 is fully shielded by the
steel chassis, installation should nevertheless be planned to avoid
locating it immediately adjacent to power amplifiers, power
supplies, or any source of low frequency electromagnetic
emissions.
Merely affixing the MP 5.0 into an equipment rack is no guarantee
that the product is making a reliable ground connection. The
mounting rails in the equipment rack should never be depended
upon for a ground connection. To protect operating personnel, the
National Electrical Manufacturers Association (NEMA)
recommends that rack cabinets be grounded.
Upon loss of a protective ground connection, all accessible
conductive parts, including knobs and controls that may appear to
be insulating, can render an electric shock.
General
Unpacking and inspection
Electrical grounding safety
Environmental considerations
Chapter 2 Installation Section 5