1= ground/shield
2= hot (+ve)
3= cold (-ve)
MIC 1 has a priority function. When MIC 1 input is used it take precedence and automatically attenuate the
volume of MIC 2, MIC 3, AUX 1 & AUX 2 inputs by 0 up to 30dB, which is adjustable with the MUTE ADJ on rear
panel. The attenuation level is preset for -30dB at the factory.
5. MUTING FUNCTION
Remark : About mute function
• When signal of MIC 1 appear, mute circuit work promptly.
• When signal of MIC 1 disappear, it returns to it previous state
about 3 seconds later.
6. CONNECTIONS
6.1. Input Connections
• MIC 1, MIC 2, MIC 3 Connection (Phone Plug)
• MIC 1, MIC 2, MIC 3 Connection (XLR Plug)
Because MIC input is electronically balanced type, it uses double pole phone plug.
Double Pole Phone Plug
MIC
Two Core Shielded Cable
MIC
Two Core Shielded Cable
To MIC connector
Single Pole Phone Plug
MIC
One Core Shielded Cable
To MIC connector
However, the microphone input circuit is in a condition of unbalance when using single pole type.
Since the state of unbalance is more vulnerable for noise generation, the recommended length of
microphone cable is at less than 10m.
• AUX Input Connection (RCA Pin Jack)
One Core Shielded
Please use commercial RCA cables to wire the 2-track input and output.
for unbalanced use, pin 1 and pin 3 have to bridged
Signal source (Tuner, Cassette Tape, etc)
Shorting DIN plug pin-4 and pin-5 of rear mounted
Mic 1 input allow Mic 1 input to reduce the volume
of Mic 2, Mic 3, Aux 1, and Aux 2 inputs by 0 to -30dB.
The attenuation level is preset for -30dB at factory.
We recommended using TOA’s microphone PM-222D
or PM-660D to bring the best results.
A-2000DD-EB Series only
6
14. AUX 1 & AUX 2 Input Terminal
-20dB, 10kΩ, unbalanced. Monaural RCA pin jack.
Accept external equipment output signal.
15. Recording Output
0dB (1V), 600
Ω
, unbalanced. Output all input
signal before the master volume control. Connect
to a cassette deck, etc., when recording the
broadcast content.
16. Muting Level Control
Adjust attenuating level from 0 to -30dB.
Factory preset : -30dB (maximum muting level).
20. Tone Volume Level Control (A-2000DT-AS 2CE Series only)
Adjust attenuating level from MIN to MAX.
Factory preset : middle (center level).
17. Phantom Switch
Selecting to ON position supplies power for
condenser microphone from MIC 1. Be sure to
select OFF when using the microphone that can not
operated on phantom power. The phantom power
is 21 V DC. Factory preset : OFF.
18. Ground Terminal
Connect to ground (earth) to avoid electric shock.
19. Tones Option (for A-2000DT-AS 2CE Series only)
6 tones contact trigger (Chime, Bell, Evac, Alert,
Lockdown, All Clear).
Phone plug connection, can used double pole
type, and single pole type.
MIC 1 input can operate a dynamic microphone
with phantom power position OFF. And condenser
microphone with phantom power position ON.
MIC 2, MIC 3 input can operate a dynamic
microphone.
2
3
1
2
3
1
ground
To XLR connector
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