6. Fast First Time Setup
Follow these instructions to get your 425 up-and-running as quickly as possible. The intent of
this section is fast setup. If you need something clarified, then you'll find the answer
elsewhere in this manual.
6.1 Connections
Connect the line-level signal source to either the female XLR connector or the 1/4 inch TRS
(tip-ring-sleeve, stereo, 3 conductor) input jack. If the source is unbalanced, then use a 1/4
inch TS (tip-sleeve, mono, or guitar) plug fully inserted into the TRS input jack.
Connect the line-level signal return to either the male XLR connector or to the 1/4 inch TRS
output jack. If you use the 1/4 inch jack, then use a TRS plug for balanced circuits or use a
TS plug for unbalanced circuits. Additional information on the signal connections may be
found in the Installation section of this manual.
Repeat for the second channel. Ignore the sidechain connections for now.
Connect the AC input to an AC power source of the proper voltage and frequency, as marked
on the rear of the unit.
Caution: Failure to connect the 425 to the proper AC mains voltage may
cause fire and/or internal damage. There are no user serviceable parts inside
the chassis. Refer all service to qualified service personnel or to the factory.
Warning: Lethal voltages are present inside the chassis. There are no
user serviceable parts inside the chassis. Refer all service to qualified
service personnel or to the factory.
LINE LEVEL
LINE LEVEL
AMP
GND = 1/4" SLEEVE
LOW = 1/4" RING
= HIGH = 1/4" TIP
IN/OUT
INPUTOUTPUT
BALANCED
SIDECHAIN
BALANCED
UNBALANCED UNBALANCED/
BALANCED
6-1
Rev 2.0, 10/29/93
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