TOA Canada Corporation
INSTALLATION MANUAL
VOLUME CONTROL ATTENUATOR
1. GENERAL DESCRIPTION
TOA’s volume control attenuators provide precise level adjustment of single or multiple speaker lines. They’re available
in 25W, or 100W models with a Decora-style wall plate. AT-100EMG is equipped with a 24VDC@15mA relay for
applications that require emergency and paging signals to bypass/override the attenuator. AT-10K is a 10k ohm linear
taper control for single-point remote level adjustment of voltage controlled amplifiers such as TOA’s M-900MK2,
A-900MK2, M-9000M2, A-9000M2, A-700, BG-2000, BA-200, AV-20D series mixers/amplifiers.
2. WIRING DIAGRAMS
AT-025 / AT-100
AT-100EMG
AT-10K
AT-025
AT-100
AT-100EMG
AT-10K
INPUT
Speaker line
(25V, 75V, or 100V)
from amplifier
OUTPUT
To speaker(s)
with transformer(s)
OUTPUT
To speaker(s)
with transformer(s)
INPUT
Speaker line
(25V, 75V, or 100V)
from amplifier
INPUT
Speaker line
(25V, 75V, or 100V)
from amplifier
OUTPUT
To speaker(s) with transformer(s)
INPUT
Speaker line
(25V, 75V, or 100V)
from amplifier
OUTPUT
To speaker(s) with transformer(s)
To switched 24VDC source
(class 2 wiring)
Schematic Diagra
IN CTRL COM
10Kohm Linear Taper Potentiometer
Typical Hook-up
IN
CTRL
COM
+V Output
Control Input
Gnd, Com, or
Amplifier /
VCA Module
