Alto HPA4, Руководство пользователя

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9
5.2 Use the HPA4 as Independent Power Amplifiers
5.3 The HPA4 in Studio Application
Generally, the Aux In Inputs are used to feed a further input signal, which can be mixed with the Main/Direct In
signal via Balanced Control, so that, well understood this function, you can get the wonderwork in the studio field.
Normal practice, if you want to record a vocal track which is intended to ride on an already existing background
musical tracks, take it easy, just use the Main Input to feed the musical background signals, and input the Vocal
signal through Aux In.
program source
Direct in
Headphone output 1
AUX in 1 AUX in 2 AUX in 3 AUX in 4
Headphone output 2 Headphone output 3 Headphone output 4
Headphone output 1 Headphone output 2 Headphone output 3 Headphone output 4
LTO
INPUT LEVEL(dBu)
DIRECT IN
INPUT GAIN
OUTPUT LEVEL(dBu)
MUTE R L
3
MONO
2 4
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
2 4
5
6
1
0
3
0 12 CLIP
OUTPUT LEVEL(dBu)
18 12 6 6
MUTE R L MONO
AUX
BALANCE OUTPUT GAIN
2 4
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
2 4
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
2 4
5
6
1
0
3
CHANNEL 2 CHANNEL 3 CHANNEL 4
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 18 18 18 12 18 18
R
LTO
INPUT LEVEL(dBu)
DIRECT IN
INPUT GAIN
OUTPUT LEVEL(dBu)
MUTE R L
3
MONO
2 4
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
2 4
5
6
1
0
3
0 12 CLIP
OUTPUT LEVEL(dBu)
18 12 6 6
MUTE R L MONO
AUX
BALANCE OUTPUT GAIN
2 4
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
2 4
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
2 4
5
6
1
0
3
CHANNEL 2 CHANNEL 3 CHANNEL 4
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 18 18 18 12 18 18
R
Instead of using the HPA4 as the Headphone Amplifier, in many particular circumstances, it can also be conducted
as the independent power amplifiers, as for this kind of application, please turn the Balanced Control to complete
clockwise.
By setting the Balanced Control to AUX position, the Main signal will then be muted, only the signals coming from
Aux In Input can be routed to the headphone amplifiers circuit. So, now, you can apply up to four independent
stereo program sources to the mixing console, and consequently, four different and individual monitor facilities for
up to four musicians can be created.