Symetrix 425 - Rear Panel Overview; Connectors and Features

5. Rear Panel Overview
INPUT
XLR PIN 2 = HI
XLR PIN 3 = L
O
XLR PIN 1 = GN
D
BALANCED BALANCED
UNBALANCED/
OUTPUT
TIP=RETURN
RING=SEND
SLEEVE=GROUND
UNBALANCED
BALANCED
IN/OUT
SIDECHAIN
SIDECHAIN
IN/OUT
POWER
12.5W MAXIMUM
UNITED STATES OF AMERICA
SEATTLE WASHINGTON,
MANUFACTURED IN
The following connectors and features are found on the rear panel of the 425.
Serial Number Do yourself a favor and write this number down somewhere
safe, and while you're at it, please send us the completed
warranty card?
power cord IEC power receptacle. Connect the power cord to an
appropriate source of AC power. Observe the marked power
supply voltage on rear panel.
UNBALANCED OUTPUT
1/4 inch tip-ring-sleeve (TRS) phone jack (wired tip = hot, ring
& sleeve = ground). Use this jack when you need an
unbalanced output. The nominal signal level here is +4 dBu.
Note: the
UNBALANCED OUTPUT connector is normally 6 dB
lower in level than the
BALANCED OUTPUT connector. You can
easily make up the difference in level via the front panel
GAIN
control.l
BALANCED OUTPUT
XLR-3 male connector. Use this connector when you need a
balanced output. The nominal signal level here is +4 dBu.
SIDECHAIN IN/OUT
1/4 inch tip-ring-sleeve connector. This is both an input and
output on the same connector (tip = input/return, ring =
output/send). Use this connector to connect equalizers and/or
filters into the 425's sidechain for frequency-selective
processing. The wiring diagram for the sidechain in/out
connector is reproduced on the back panel of the 425.
UNBALANCED/BALANCED
INPUT
1/4 inch TRS phone jack. This connector is wired in parallel
with the XLR input connector. Connect either balanced or
unbalanced sources here. Use a tip-sleeve plug for unbalanced
sources and a tip-ring-sleeve (stereo) plug for balanced
sources.
BALANCED INPUT
XLR-3 female connector. This connector is wired in parallel
with the TRS input connector. Connect balanced sources here.
The remaining connectors on the rear panel are the channel 1 input/output/sidechain
connectors. These connectors duplicate those used for channel 2.
5-1
Rev 2.0, 10/29/93