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INPUT 4 SET AS AUX 1 (Reference. 19)
The AUX 1 input is provided for high level program source.
The output from a Satellite Receiver, Tuner, Tape Cassette
Deck, CD Player or other high level program source may
be directly connected to this input.
AUX 1 SENSITIVITY ATTENUATOR (Reference. 18)
The AUX 1 Input is equipped with a Sensitivity Attenuator
that allows the interface of the Input with Devices having a
wide range of Output Levels.
TYPICAL OUTPUT LEVEL OF MUSIC DEVICES:
Satellite Receivers = 1 to 5 Volt
Digital Tuners/Receivers = 100 to 300 Mv
CD Players/Changers = 2 to 3 Volt
Tape Decks = 500 to 700 Mv
By adjusting the Input Sensitivity to the level that matches
the device used the correct interface with the Amplifier is
achieved resulting in lower overall distortion and better fre-
quency response characteristics.
SETTING THE AUX 1 INPUT ATTENUATOR
Connect a Music Source to the Amplifier.
Turn Attenuator (rear panel) fully counterclockwise.
Turn INPUT 4 Front Panel Control to midway.
Switch Amplifier and Music Source ON.
Turn Attenuator Control (rear panel) until desired Output
Level is achieved.
Adjust INPUT 4 Front Panel Level Control Up-Down as
desired.
STEREO SUMMING
Most Music Source Devices provide a Stereo Output.
Accordingly the Amplifier is equipped with two Jacks for the
AUX 1 Input (L and R). The two Inputs are internally
buffered and electronically mixed to Mono. This system
ensures that the Music Device is properly loaded and that
the Stereo Signals are correctly summed (L+R) to Mono
without distortion.
CABLE
To connect the music source devices to the AUX 1 Input
use two single conductor shielded audio cable terminated
in a single prong phono plug on both ends.
R
MUSIC OUTPUT
L
LR
SATELLITE RECEIVER
paso
AM/FM TUNER
CD PLAYER
CD
TAPE DECK
TRACK 01
AUX 1
ATTENUATOR
3120 Aux1 01
R
L
ATTENUATOR
(AUX2)
INPUT 5
MIC-AUX2
BY INTERNAL
SWITCH
47kohm 100mV
INPUT-5(AUX2)
INPUT - 4 (AUX1)
47 kohm 100 mV
18
19
V1
V2
OFF
VOX 2 BUSS OFF
M2
M1
OFF
INPUT 4
AUX 1
X
MUTE 2 BUSS OFF
X
MUTE 1 BUSS ON
MUSIC OUT
MUSIC
IN
Input 1-4 - V1 - 01
SW212
SW217
VOX 1 BUSS OFF
X
WHEN MIC 1 IS
ACTIVATED THE VOX 1
BUSS IS SWITCHED-ON
AND THE SIGNAL
PRESENT ON THE
MUTE 1 BUSS WILL
MUTE THE MUSIC
FROM INPUT 4/AUX 1
JUMPER
JUMPER
AUX 1 MIC 4
SW228
AUX 1 - MIC 4 SWITCH
DEFAULT JUMPERS AND SWITCH SETTING
SW212 = OFF
SW217 = M 1
SW228 = AUX 1
Fig. 14 - Rear Panel AUX 1 Input Diagram
AUX 1
AUX 1 INPUT MUTING
AUX 1
ATTENUATOR
3120 Stereo Summ
INPUT - 4 (AUX1)
47 kohm 100 mV
18
19
L
R
Fig. 14A - Stereo Summing and AUX 1 Input Attenuator
MUTING - WHEN MIC 1 OR THE TEL IN ARE ACTI-
VATED THE VOX 1 BUSS IS SWITCHED-ON AND
THE SIGNAL PRESENT ON THE MUTE 1 BUSS
WILL MUTE THE MUSIC FROM AUX 1.
SETTING INPUT 4 AS AUX 1 INPUT 4/AUX 1 DEFAULT SETTING
JUMPERS/SWITCH NO. FACTORY SETTING
SW212 - VOX JUMPER = OFF
SW217 - MUTE JUMPER = M 1
SW228 - AUX1-MIC4 SWITCH = AUX 1
PAGE 14
SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE DMS3040/3080/3120
INSTALLATION AND WIRING
PROFESSIONAL AUDIO & SOUND
®
TM
DIGITAL MUSIC SERIES
DIGITAL MUSIC AMPLIFIERS