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Background musical signals
ain nputMI
Vocal signal
AUX In 1
5.4 The HPA4 in Mono / Stereo Application
Mode Switch control. Press the Mode Switch for Mono application, the Mono LED (8) lights up. In Mono application,
the input two signals are combined together and the resulting mono signal routes to both the Left and Right Head-
phone Out Outputs.
10
LTO
INPUT LEVEL(dBu)
DIRECT IN
INPUT GAIN
OUTPUT LEVEL(dBu)
MUTE
R
L
3
MONO
24
5
6
1
0
4-Channel
HEADPHONE
AMPLIFIER
HPA4
0
15
15
CHANNEL 1
BASS
HEADPHONE OUT
TREBLE
OUTPUT GAIN
0
AUX IN
15
15
24
5
6
1
0
3
0
12
CLIP
OUTPUT LEVEL(dBu)
18
12
6
6
MUTE
R
L
MONO
AUX
BALANCE OUTPUT GAIN
24
5
6
1
0
0
15
15
BASS
HEADPHONE OUT
TREBLE
0
AUX IN
15
15
0
12
CLIP
OUTPUT LEVEL(dBu)
18
12
6
6
MUTE
R
L
MONO
AUX
BALANCE OUTPUT GAIN
24
5
6
1
0
3
MAIN SECTION
0
15
15
BASS
HEADPHONE OUT
TREBLE
0
AUX IN
15
15
0
12
CLIP
OUTPUT LEVEL(dBu)
18
12
6
6
MUTE
R
L
MONO
0
15
15
BASS
HEADPHONE OUT
TREBLE
0
AUX IN
15
15
AUX
BALANCE OUTPUT GAIN
24
5
6
1
0
3
CHANNEL 2 CHANNEL 3 CHANNEL4
ON
OFF
POWER
MUTE MUTE MUTE MUTE
MAIN IN MAIN IN MAIN IN
AUX
BALANCE
MAIN IN
3
0
12
CLIP
18
12
6
6
0
CLIP
18
12
6
6 18181812 18 18
R
Headphone Output 1
The HPA4 4-Channel Headphone Amplifier can be switched between the Mono and Stereo operational mode via