Alto MAC 2.4 Service Manual

2
1. Introduction
1.1 The stereo amplifier apparatus specialization in the performance, have versatility-changed
output (stereo, parallel and bridged selector), you will hear excellence music.
1.2. Input matching allows collection with any preamplifier
1.3. Excellent frequency echo and sound quality
1.4. XLR unbalanced and 6.3ф jack output.
1.5. High-speed and low noise fan for releasing heat. When the temperature rises, the fan
automatically switches to high- speed, it re-back to normal speed at other times to reduce
power consumption
1.6. The apparatus have changed limited overload function, when it turns on the apparatus
most output.
1.7. Status indicators of SIG and CLIP. When there is any signal added, the SIG LED lights up.
When there is overload, the CLIP LED lights up. If anything abnormal happens to the
circuits, the CLIP LED will be continuously on, with no action from the circuits. This helps
the user to determine which status it is in. .
1.8. Power supply of steady circuit adopted to unaided voltage output of highly cabinet.
1.9. Output jack specialization in female speaker jack.
2. Specification
Power s
p
ecifications MAC2.2 MAC2.3 MAC2.4
2Ohms 480 800 1400
4Ohms 300 450 750
Stereo mode (both channels
driven )20Hz~20KHz
8Ohms 205 310 575
8Ohms 560 900 1500
Bridge mono mode 20Hz~KHz
4Ohms 800 1400 2500
Electrical S
p
ecifications 600W 900W 1500W
In
p
ut sensitivit
y
1.15V
(
+3.4dBu
)
In
p
ut im
p
edance 10
K
Ω unbalanced 20
K
Ω balanced
Fre
q
uenc
y
res
p
onse
(
at 10dB 25Hz~25KHz +0/-1dB-3dB
p
oints:5Hz~50KHz
Volta
g
e Gain 30dB 32dB 34dB
Distortion
(
sm
p
te-1m
)
<0.03
%
Si
g
nal to noise ratio 100dB
General s
p
ecification 600W 900W 1500W
Protections
Full short circuit, open circuit, thermal, ultrasonic, and RF
protection stable into reactive or mismatched loads, turn
ON/OFF, muting, tried crowbar.
Controls
Front: AC switch 40-detect input level control for each
channel.
Rear: stereo/parallel/bridged selector, 30Hz filter selector
cli
p
ON/OFF selector.
Indicators Si
g
nal: 2×
g
reen LED CLIP:2×red LED
Connectors In
p
ut: Active balanced XLR and 1/4”
(
6.3mm
)
TRS
Power su
pp
l
y
A
vailable for 110-120V or 220~240VAC
,
50/60Hz
Dimensions 483
(
W
)
×400
(
D
)
×88.8
(
H
)
mm
Wei
g
ht 14.4k
g
16.5k
g
19.02k
g

Alto MAC 2.4 Specifications

General

Brand	Alto
Model	MAC 2.4
Category	Amplifier
Language	English