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アンプ Alto D4のPDF オーナーズマニュアルをオンラインで閲覧またはダウンロードできます。Alto D4 16 ページ。 Professional power amplifiers
Alto D4 にも: ユーザーマニュアル (12 ページ)
Front Panel:
1 POWER SWITCH & INDICATOR LED
It powers the D amplifier ON and OFF . When the D amplifier is turned on the
power switch illuminates blue.
2 SIGNAL LED
This LED will light up green when the signal at the output is at least -20 dB.
3 CLIP LED
This LED will flash when distortion reaches a level of 0.5%, Turn the relative
GAIN control down so that the CLIP LEDs only flash occasionally.
4 PROTECTION LED
It will light up when the unit is in Protection Mode due to short circuit, low
impedance load or other causes.
5 GAIN CONTROLS
These controls are used to adjust the output signal level.
6 COOLING VENTS
Allow air circulation from front to back of the amplifier.
SIG CL P PROT
0
1
6
2
6
CH1
SIG CLIP PROT
20
18
22
1
24
12
26
6
28
CH1
30
(dB)
3. CONTROL ELEMENTS
S G CLIP PROT
S G C IP PROT
SIG CL P PROT
2
2
1
2
22
1
22
24
16
24
16
24
16
4
6
1
26
1
26
12
6
28
6
8
6
28
6
28
CH2
CH3
CH4
30
dB)
0
dB)
0
(dB
0
dB)
3
4
2
SIG CL P PROT
S G CLIP PROT
SIG CLIP PROT
20
20
20
18
22
18
22
18
16
24
1
24
16
12
26
12
26
12
6
28
6
28
6
CH2
CH3
CH4
30
dB)
30
(dB)
5
1
6
22
24
6
28
30
dB)
D2
500W 4
5