Alto MS SERIES Schematic
MODEL: MS12/15/152/153/154
www.altoproaudio.com
Version 1.0
CONTENT
1. Introduction……………………………………………………..…………..1
2. Specification……………………..………………….……………………...2
3. Block Diagram……………………..…………..…………………...………5
4. Schematic Diagram…………….……………..…………………..….……10
5. Wiring Diagram…………………….…………………..…...….…….……..15
6. PCB Layout……………………….……………..……….…...…….….……20
7. Exploded View & Mechanical Parts List…………….…….…….……...23
8. BOM…………………………………………………….…...…..….……….…33
1.Introduction
- 1 -
MS series cabinets are designed for professional stage performance. This series
use high density plywood material for the body of the cabinet. With the accuracy
crossover point makes the tone color more clear. MS12/MS15/MS152 adopt
spherical horn in polypropilene reinforced shows excellent tweeter and has wide
directional angle 90 °H ※ 60°V (1KHZ-16KHZ), MS153/MS154 adopt square
horn in polypropilene Reinforced.
The power inside are as following:
MS12/ Continuous 200Watts/400W Peak
MS15/ Continuous 300Watts/600W Peak
MS152/ Continuous 500Watts/1000W Peak
MS153/ Continuous 400Watts/800WPeak
MS154/ Continuous 700Watts/1400W Peak
All these characters made them very suitable for any place.
Model No. MS12
g
g
2. Technical Speciation
- 2 -
Passive System Type 2-way vented box
Continuous Power 200Watt AES Standard
Peak Power 400Watt Peak
Max SPL at 1m 119dB Nominal / 122dB Peak
Frequency Response 65Hz / 20kHz at -10dB
Impedance 8 Ohm
Crossover Frequency 2k5Hz / 12dB/Oct
Protection Electronic Dynamic Protection
Low Frequency Device 12”woofer / 2” voice coil
High Frequency Device 1” Neodymium Driver / 1” voice coil
Coverage H° x V° 90° H x 60° V Elliptical Wave Guide
Connectors 2 x SPK4 @ Power Input / Link
Cabinet
Dimensions H x W x D H650 x W400 x D365(mm)
Net Weight (lbs/kg) 43.87lbs/19.90kg
Trapezoidal Shape / Composite wood/ Metal
Handle / Black Paint finishin
Model No. MS15
Passive System Type 2-way vented box
Continuous Power 300Watt AES Standard
Peak Power 600Watt Peak
Max SPL at 1m 122dB Nominal / 124.5dB Peak
Frequency Response 55Hz / 20kHz at -10dB
Impedance 8 Ohm/ 4 Ohm
Crossover Frequency 2kHz / 12dB/Oct
Protection Electronic Dynamic Protection
Low Frequency Device 15”woofer / 2.5” voice coil
High Frequency Device 1” Neodymium Driver / 1” voice coil
Coverage H° x V° 90° H x 60° V Elliptical Wave Guide
Connectors 2 x SPK4 @ Power Input / Link
Cabinet
Dimensions H x W x D H750 x W450 x D420(mm)
Net Weight (lbs/kg) 55.07lbs/24.98kg
Trapezoidal Shape / Composite wood/ Metal
Handle / Black Paint finishin
g
g
Model No.
- 3 -
MS152
Continuous Power 500Watt AES Standard
Peak Power 1000Watt Peak
Max SPL at 1m 127dB Nominal / 130dB Peak
Frequency Response 55Hz / 20kHz at -10dB
Impedance 4 Ohm
Crossover Frequency 250Hz~2kHz / 12dB/Oct
Protection Electronic Dynamic Protection
Low Frequency Device 2 x 15”woofer / 2.5” voice coil
High Frequency Device 1”Driver / 1.35” voice coil
Coverage H° x V° 90° H x 60° V Elliptical Wave Guide
Connectors 2 x SPK4 @ Power Input / Link
Cabinet
Trapezoidal Shape / Multi-layer Plywood/ Metal
Handle / Black Paint finishin
Dimensions H x W x D H1100 x W450 x D443(mm)
Net Weight (lbs/kg) 78.66lbs/35.68kg
Model No.
MS153
Continuous Power 400Watt AES Standard
Peak Power 800Watt Peak
Max SPL at 1m 123dB Nominal / 126dB Peak
Frequency Response 50Hz / 20kHz at -10dB
Impedance 8 Ohm or 4 Ohm
Crossover Frequency 700Hz - 3kHz / 12dB/Oct
Protection Electronic Dynamic Protection
Low Frequency Device 15” woofer / 2.5” voice coil
Mid Frequency Device 8” midrange / 2” voice coil
High Frequency Device 1” Neodymium Driver / 1” voice coil
Coverage H° x V 90° H x 45° V Dual Wave Guide
Connectors 2 x SPK4 @ Power Input / Link
Cabinet
Trapezoidal Shape / Multi-layer Plywood/ Metal
Handle / Black Paint finishin
Dimensions H x W x D H900 x W450 x D415 (mm)
Net Weight (lbs/kg) 67.59lbs/30.66kg
g
Model No.
- 4 -
MS154
Continuous Power 700Watt AES Standard
Peak Power 1400Watt Peak
Max SPL at 1m 128dB Nominal / 131dB Peak
Frequency Response 45Hz / 20kHz at -10dB
Impedance 4 Ohm
Crossover Frequency 700Hz - 3kHz / 12dB/Oct
Protection Electronic Dynamic Protection
Low Frequency Device 2 x 15” woofer / 2.5” voice coil
Mid Frequency Device 8” midrange / 2” voice coil
High Frequency Device 1” Driver / 1.35” voice coil
Coverage H° x V 90° H x 45° V Dual Wave Guide
Connectors 2 x SPK4 @ Power Input / Link
Cabinet
Trapezoidal Shape / Multi-layer Plywood/ Metal
Handle / Black Paint finishin
Dimensions H x W x D H1250 x W450 x D443 (mm)
Net Weight (lbs/kg) 95.22lbs/43.19kg
D
3. Block diagram
- 5 -
654321
C
B
A
INVERTED
Ω
MS12 WOOFER
WOOFER SPEAKER
MS12 BLOCK DIAGRAM
CROSSOVER CIRCUIT
B
SPK2
2-
1+
2+
DRIVER SPEAKER
PA-D597NH 8
2-
B
SPK1
2+
1+
1-
D
C
INPUT
1-
1 2 3 4 5 6
B
A
D
- 6 -
654321
C
WOOFER SPEAKER
WOOFER SPEAKER
MS15 WOOFER
MS15 WOOFER
B
DRIVER SPEAKER
PA-DE34 8O INVERTED
A
MS152 BLOCK DIAGRAM
CROSSOVER CIRCUIT
D
C
B
SPK2
2-
1+
2+
1-
2-
B
SPK1
2+
1+
1-
INPUT
1 2 3 4 5 6
B
A
D
- 7 -
654321
C
B
A
MID SPEAKER
WOOFER SPEAKER
MS15 WOOFER
MS153 BLOCK DIAGRAM
CROSSOVER CIRCUIT
8"
DRIVER SPEAKER
PA-D597NH 8O INVERTED
B
SPK2
2-
1+
2+
1-
2-
B
SPK1
2+
1+
1-
INPUT
1 2 3 4 5 6
D
C
B
A
D
b
- 8 -
654321
C
B
A
INVERTED
Ω
DRIVER SPEAKER
WOOFER SPEAKER
MS15 WOOFER
PA-D597NH 8
MS15 BLOCK DIAGRAM
CROSSOVER CIRCUIT
B
1+
D
C
SPK2
2-
2+
1-
B
2+
INPUT
2-
SPK1
1+
1-
1 2 3 4 5 6
B
A
D
列
圖
- 9 -
654321
C
B
A
MID SPEAKER
WOOFER SPEAKER
WOOFER SPEAKER
MS15 WOOFER
MS15 WOOFER
MS154 BLOCK DIAGRAM
CROSSOVER CIRCUIT
8"
DRIVER SPEAKER
PA-DE34 8O INVERTED
B
SPK2
2-
1+
2+
1-
2-
B
SPK1
2+
1+
1-
INPUT
1 2 3 4 5 6
D
C
B
A
D
4.Schematic Diagram
MS12 PASSIVE CROSSOVER
- 10 -
C
B
A
INVERTED
4321
DRIVER
1" PA-D597NH 8O
P1
12" ELVIS 6O
WOOFER
(BROWN)
(BLACK)
_
+
+
LOW
C1
10uF/250V
(BLACK)+(BLUE)
_
Hi O/P
P3
+
PTC1
0.5A/60V
_
P2
R4
DS2
10R/20W
DS1
I2V 2.1A
I2V 2.1A
HI
R3
39R/20W
_
P4
L1
1.55mH (BIG)
+
R2
3R3/20W
L2 0.35mH
C2
3.3uF/250V
R1
1R5/20W
IN
_
1 2 3 4
D
C
B
A
D
MS15 PASSIVE CROSSOVER
- 11 -
4321
C
B
A
P1
WOOFER 15" ELVIS 6O
+
(BLACK)
_
LOW
C1
8.2uF /250V
_
P2
R4
(BROWN)
+
P3
PTC1
DS2
10R/20W
DS1
R2
Hi O/P
(BLACK)
+
+
HI
0.5A/60V
I2V 2.1A
I2V 2.1A
R3
3R3/20W
(BLUE)
INVERTED
DRIVER 1" PA-D597NH 8O
_
P4
_
39R/20W
L1
L2 0.35mH
2.0mH (BIG)
C2
3.3uF/250V
R1
1R5/20W
IN
+
D
_
1 2 3 4
C
B
A
D
MS15.2 PASSIVE CROSSOVER
- 12 -
4321
C
B
A
INVERTED
DRIVER PA-DE34
(BLACK)+(RED)
_
WOOFER ELVIS 15 6O
(RED)
+
WOOFER ELVIS 15 6O
(BLACK)
_
Hi O/P
P5
_
+
HI
P6
P1
L3
(BROWN)
+
+
LOW1
4.2mH IRON
(BLACK)
_
_
PTC1
P3
_
+
P4
0.5A/60V
LOW2
P2
10R/20W
R5
1R5/20W
DS2
DS1
R2
R1
I2V 2.1A
I2V 2.1A
JUMP2
1R5/20W
R4
39R/20W
L2
0.35mH (AIR)
C1
6.8uF/250V
R3
IN
+
D
_
L1
1.55mH(R10*30mm)
C2
3.3uF/250V
PTC1
JUMP1
1 2 3 4
C
B
A
D
MS15.3 PASSIVE CROSSOVER
- 13 -
4321
C
B
A
INVERTED
DRIVER PA-D597NH
(BLACK)+(BLUE)
_
WOOFER ELVIS 15 6O
(RED)
+
(BLACK)
_
+
_
P4
MID SPEAKER 8" 8O
(RED)
P5
+
(BLACK)
_
+
_
MID
P6
R7
DS2
10R/20W
P7
PTC1
Hi O/P
_
0.5A/60V
I2V 2.1A
HI
P8
+
BLACK +
P12
L2
P11
WHITE +
ELVIS 15 LOW2 250/300W
C2
22uF /AC250V
C1
22uF /AC250V
3mH IRON P3
L4
C3
R1
JUMP
C4
10uF /250V
R2
4R7/20W
L3
1.8mH(R50*20mm)
4.7uF /250V
R3
4R7/20W
4R7/20W
DS1
C6
R5
R4
I2V 2.1A
R6
39R/20W
1R5/20W
L5
0.35mH (AIR)
2.2uF/250V
1R5/20W
+
D
IN
1 2 3 4
_
C
B
A
D
MS15.4 PASSIVE CROSSOVER
- 14 -
4321
C
B
A
INVERTED
DRIVER PA-DE34
(BLACK)+(RED)
_
P1
WOOFER ELVIS 15 6O
(BROWN)
+
+
(BLACK)
_
_
(RED)
+
+
P2
WOOFER ELVIS 15 6O
(BLACK)
_
P5
(ORANGE)
+
+
_
P4
MID SPEAKER 8" 8O
(BLACK)
_
_
MID
P6
R7
DS2
10R/20W
P7
PTC1
Hi O/P
_
0.5A/60V
I2V 2.1A
HI
P8
+
P10
L1
4.2mH IRON
P9
RED + BLACK -
ELVIS 15 LOW1 250/300W
L2
ELVIS 15 LOW2 250/300W
C2
22uF /AC250V
C1
22uF /AC250V
P12
3mH IRON P3
P11
BLACK -
WHITE +
R9
6R8/20W
L4
C3
R1
C5
4.7uF/250V
0.4mH(AIR)
C4
10uF /250V
R2
6R8/20W
R8
6R8/20W
L3
1.8mH(R50*20mm)
10uF /250V
R3
6R8/20W
6R8/20W
DS1
C6
R5
R4
I2V 2.1A
R6
39R/20W
1R5/20W
L5
0.35mH (AIR)
3.3uF/250V
1R5/20W
IN
+
_
D
1 2 3 4
C
B
A
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