PRE420 Instruction Manual – rev. E
Page 16
Rack Mounting
To enable rack mounting, the front panel of
the PRE420 has rack-mount holes that are
machined to conform to standard rack mount
dimensions. The PRE420 ships with rubber
feet that should be removed whenever
another device will be mounted directly below
the PRE420.
Mounting Near Other
Equipment
CAUTION: STRAY MAGNETIC FIELDS
FROM ADJACENT EQUIPMENT MAY
CAUSE MAGNETICALLY INDUCED HUM IN
THE SENSITIVE HIGH-GAIN PREAMP
CIRCUITS.
The PRE420 may be mounted directly above
or below other PRE420 preamps. It may also
be mounted directly above or below
Benchmark DAC1 and ADC1 converters. The
Pre420 is well shielded but we cannot
guarantee that unknown pieces of equipment
will not cause interference if mounted too
close to the PRE420. Follow the procedure
below when mounting near other equipment:
TIP: TO CHECK FOR MAGNETIC
INTERFERENCE FROM ADJACENT
EQUIPMENT:
•
Disconnect all microphones
•
Turn on all pads (to back-terminate
microphone inputs)
•
Set all preamp gain controls at maximum
•
Listen to headphone output
•
Unplug adjacent equipment to determine
if there is any magnetic interference
TIP: IN MANY CASES, POWER SWITCHES
DO NOT TURN OFF ALL OF THE
MAGNETIC COMPONENTS IN AN
ELECTRONIC DEVICE. THEREFORE, WHEN
PERFORMING MAGNETIC INTERFERENCE
TESTS, IT IS IMPORTANT TO UNPLUG
THE ADJACENT EQUIPMENT TO INSURE
THAT THESE DEVICES ARE TRULY OFF.
