Symetrix 422 - Introduction

422
1
IntroductionChapter 1
Front panel
Rear panel
Congratulations on your decision to use a Symetrix model 422 Stereo AGC/Leveler. The 422 has
been designed to give professional audio users unequaled performance, ease of use, and reliability.
This manual will guide you through installation and operation of the 422, and provide valuable tips
on how to interface with other equipment in your system.
The 422 is a singular solution for controlling unpredictable stereo (or monaural) audio levels in a
wide variety of audio systems. Application environments include broadcast, recording, tape
duplication and installed foreground and background systems just to name a few. The 422 excels at
subtly and unobtrusively bringing level divergent audio into a target window , resulting in greater
intelligibility and informational perception. Unlike compressor/limiters, which are effective at
reducing sounds that are too loud (pushing down from the top only), the 422 provides both
downward compression and upward leveling by gently adding gain to low level signals until a
target level is reached.
The 422 employs advanced analog signal processing technology executed with high quality
industrial grade components to meet, or exceed, the highest professional audio industry standards
in terms of headroom, low noise and distortion, and superb sonic qualities.
The 422's logical control panel holds no hidden surprises. The product is easy to learn and simple
to use. In the sections that follow, you’ll find information on installation, operation, and specific
applications of the 422.
We recommend that you read this manual from cover to cover. Somewhere between the confines of
the two covers you should find the answers to most of your questions. If not, please feel free to
contact our Customer Service department via phone, fax, or e-mail for answers to your questions.
The numbers are:
Telephone:(425) 778-7728
Fax:(425) 778-7727
E-mail: symetrix@symetrixaudio.com
Web site: www.symetrixaudio.com
POWER
THIS UNIT IS
XLR Pin 2 is HIGH.
be Balanced or Unbalanced.
Input and Output connections may
PIN 3 = RING = LOW
PIN 2 = TIP = HIGH
PIN 1 = SLEEVE = GROUND
TYPICAL CONNECTIONS:
REMOTE
BYPASS
RIGHTRIGHT
OUTPUTS INPUTSOUTPUTS INPUTS
AC INPUT
LEFT
422
STEREO AGC/LEVELER
15 WATTS
LEFT
MANUFACTURED IN
LYNNWOOD, WA, U.S.A.
MAX
OUTPUT LEVEL
+12 +6 0VU-6 -12 -18 -24 -30 -36 -42 -48 -54
0VU +6 +12 -24 -18 -12 -6 -30 -36 -42 -48 -54
INPUT LEVEL
CLIP
BYP
SYSTEMPEAK LIMITTARGET LEVELRATIO
DETECTOR
AGC/LEVELER
422
STEREO
THRESHOLD (Vu) INPUT : OUTPUT OUTPUT LEVEL THRESHOLD (Vu)
+15
BYPASS
+5
-5
2.5 : 1
-15
INCREASE
5 : 1
DECREASE
BYPASS
-20
-45
LIMIT
IN
IN
BYPASS
BYPASS