
H:\MX23\100459-1.SCH 22-Jan-1998
NOTES (UNLESS OTHERWISE SPECIFIED):
1. ALL RESISTORS 1/4W 1% METAL FILM
2. ALL SWITCHES SHOWN IN THEIR 'OUT' OR 'OFF' POSITION
LEFT INPUT
RIGHT INPUT
S HEADRECK R JEFFS
ACTION:
NO CHANGE TO PART,
NEW DOC# FJ 16JAN98
GND
LOW CROSSOVER
100459-2.SCH
20K
R33
20K
GND
R32
-15
1K
9.09K
10K
GND
20K
GND
R5
R7
R9
-15
4 6
22/25
R10
2
Z2A
TL072
10KA
R1B
1
5
C3
3
84
XLR FEM
1
330pF
2
Z1A
TL072
+15
XLR FEM
GND
10KA
R1A
J2
1
2
3
+
-
R21
1K
C7
330pF
6
Z1B
TL072 C9
9.09K
R23
5
R25
10K
GND
7
J1
2
3
+
-
R22
R4
1K
C1
9.09K
R6
1K
9.09K
R24
3
R26
10K
R8
+15
84
GND
10K
1
GND
1 3
2
20K
22/25
R27
INPUT
LEVEL
GND
GND
3
R35
-15
2
TL072
Z4A
+15
84
20K
R34
20K
1
CHECKED BY:DRAWN BY:
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Mukilteo WA 98275-5098
SHEET:
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SCHEM: INPUTS MX 23
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MID/HIGH CROSSOVER
100459-3.SCH
LOW/SUB OUTPUTS
100459-4.SCH
MID/HIGH OUTPUTS/POWER
100459-5.SCH
100459
GND GND
22.1K
R12
150K
R13
TL072
100
.33
.33
.33
5
6
Z2B
7
LX
TO SH. 2
R11
C4
C5
C6
9.53K
R14
GND
GND
GND
1K
R68
C103
1/35
+
R19
100K
TL072
+4dBu
5
10K
5817
10K
1.0V
Z3B
7
-15
R67
G
6
D1
R17
D9
5817
10K
D2
R18
R15
3.74K
-15
4
3
Z3A
TL072
10K
OL
-155.0V
1
R20
R
R28
100
R29
150K
R30
.33
.33
.33
C10
C11
C12
10K
R16
22.1K
GND GND
-15
2
+15
8
6
TL072
Z4B
5
9.53K
R31
7
D7
RX
TO SH. 2

H:\MX23\100459-2.SCH 22-Jan-1998
FREQUENCY
CROSSOVER
GND
100KB
1K
R66
CW
GND
GND
VOLTAGE RANGE = .7V ->0V
FRENQUENCY RANGE = 80 Hz -> 1 kHz
10/16
C31
6
+
511
20K
R63
5
+15
R64
R65
GND
30.1K
20K
Z5B
TL072
7
R62
10
GND
+
10/16
C32
GND
3
2
Z5A
-15
4
TL072
+15
8
1
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ACTION:
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NEW DOC# FJ 16JAN98
CHECKED BY:DRAWN BY:
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SHEET:
SCHEM: LOW XOVER MX 23
100459
R85
R84
5.11K
GND
GND
R83
GND
GND
-15
GND
470pF
20K
470pF
0.1
470pF
C21
GND
C22
GND
R78
470pF
C19
GND
-15
C20
511
3
9
GND
C30
GND
TL074
R58
511
14
SSM2164
10
TL074 12
33.2K
R60
511
11
SSM2164
Z12D
TL074
14
TL072
33.2K
R53
511
6
SSM2164
3
Z12A
TL074 5
33.2K
R56
Z11A
841
SSM2164
Z12B
7
33.2K
R57
15
Z11D
13
9
Z12C
8
R59
10
Z11C
12
13
.0047
6
1
R55
2
6
20K
Z14B
7
R52
7
Z11B
5
2
.0047
LX
5
411
16
100K
.0047
C26
R77
R54
FROM SH. 1
22/25
LEFT F2
TO SH. 3
+15
.0047
0.1
GND
C24
C25
7.15K
C124
C23
C29
+15
R76
7.15K
R75
GND
30.1K
20K
R46
R45
5.11K
GND
GND
R44
GND
-15
GND
470pF
20K
GND
470pF
0.1
470pF
C13
GND
C14
GND
R39
-15
470pF
C2
GND
-15
R47
511
C8
3
9
GND
C28
GND
TL074
R49
511
14
SSM2164
10
TL074 12
33.2K
R51
511
11
SSM2164
Z8D
TL074
14
2
TL072
33.2K
R41
511
6
SSM2164
3
Z8A
TL074 5
1
33.2K
2
Z6A
841
SSM2164
6
Z8B
7
33.2K
R48
15
Z6D
13
9
Z8C
8
R50
10
Z6C
12
13
.0047
20K
Z14A
1
7
Z6B
5
2
R43
RX
R38
3
84
R40
411
16
100K
.0047
.0047
C18
22/25
+15
R42
GND
FROM SH. 1
7.15K
+15
C123
RIGHT F2
TO SH. 3
.0047
C15
C27
0.1
C16
C17
+15
R37
7.15K
R36
LEFT LP
TO SH. 4
RIGHT LP
TO SH. 4

H:\MX23\100459-3.SCH 22-Jan-1998
CROSSOVER
FREQUENCY
GND
100KB
1K
R187
CW
GND
GND
VOLTAGE RANGE = .83V ->0V
FRENQUENCY RANGE = 350 Hz -> 7 kHz
10/16
+
C112
6
511
16.5K
R181
5
+15
R185
R186
GND
30.1K
20K
R106
R86
Z23B
TL072
7
R184
10
GND
+
10/16
C113
GND
3
2
Z23A
-15
4
TL072
+15
8
1
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Mukilteo WA 98275-5098
3 5
of
ACTION:
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NEW DOC# FJ 16JAN98
CHECKED BY:DRAWN BY:
10802 47th Avenue West
SHEET:
SCHEM: MID/HIGH XOVR MX 23
100459
5.11K
GND
GND
R104
GND
GND
-15
GND
470pF
470pF
20K
470pF
0.1
C45
GND
C51
GND
R82
470pF
C43
GND
-15
C44
511
3
GND
C111
GND
TL074 10
R179
511
14
SSM2164
TL074 12
33.2K
R180
511
11
SSM2164
Z13D
TL074
14
TL072
R175
511
6
SSM2164
3
TL074 5
33.2K
R178
9
841
SSM2164
Z13B
7
33.2K
15
Z28D
13
9
Z13C
8
R170
10
Z28C
12
13
20K
6
Z27B
33.2K
Z28B
Z13A
1
R112
2
Z28A
6
R113
680pF
LEFT F2
R81
5
7
R111
7
5
2
411
16
R183
100K
680pF
680pF
C98
FROM SH. 2
LEFT HP
TO SH. 5
+15
680pF
C85
C110
0.1
GND
C87
C89
7.15K
+15
R102
7.15K
R101
GND
30.1K
20K
R105
R80
5.11K
GND
GND
R103
GND
-15
GND
470pF
20K
GND
470pF
0.1
470pF
C41
GND
C42
GND
R79
-15
470pF
C39
GND
-15
C40
511
3
9
GND
C109
GND
TL074
R173
511
14
SSM2164
10
TL074 12
33.2K
R174
511
11
SSM2164
Z7D
TL074
14
2
TL072
33.2K
R171
511
6
SSM2164
3
Z7A
TL074 5
1
33.2K
R172
2
Z24A
841
SSM2164
6
Z7B
7
R109
33.2K
15
Z24D
13
9
Z7C
8
R110
10
Z24C
12
13
680pF
RIGHT F2
20K
3
Z27A
1
R107
7
Z24B
5
2
411
R108
16
100K
680pF
680pF
C82
FROM SH. 2
R74
+15
84
RIGHT HP
TO SH. 5
+15
680pF
R182
0.1
GND
C70
C81
C60
C102
7.15K
+15
R100
7.15K
R99
LEFT MID
TO SH. 5
RIGHT MID
TO SH. 5

H:\MX23\100459-3.SCH 22-Jan-1998
CROSSOVER
FREQUENCY
GND
100KB
1K
R187
CW
GND
GND
VOLTAGE RANGE = .83V ->0V
FRENQUENCY RANGE = 350 Hz -> 7 kHz
10/16
+
C112
6
511
16.5K
R181
5
+15
R185
R186
GND
30.1K
20K
R106
R86
Z23B
TL072
7
R184
10
GND
+
10/16
C113
GND
3
2
Z23A
-15
4
TL072
+15
8
1
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Mukilteo WA 98275-5098
3 5
of
ACTION:
NO CHENGE TO PART,
NEW DOC# FJ 16JAN98
CHECKED BY:DRAWN BY:
10802 47th Avenue West
SHEET:
SCHEM: MID/HIGH XOVR MX 23
100459
5.11K
GND
GND
R104
GND
GND
-15
GND
470pF
470pF
20K
470pF
0.1
C45
GND
C51
GND
R82
470pF
C43
GND
-15
C44
511
3
GND
C111
GND
TL074 10
R179
511
14
SSM2164
TL074 12
33.2K
R180
511
11
SSM2164
Z13D
TL074
14
TL072
R175
511
6
SSM2164
3
TL074 5
33.2K
R178
9
841
SSM2164
Z13B
7
33.2K
15
Z28D
13
9
Z13C
8
R170
10
Z28C
12
13
20K
6
Z27B
33.2K
Z28B
Z13A
1
R112
2
Z28A
6
R113
680pF
LEFT F2
R81
5
7
R111
7
5
2
411
16
R183
100K
680pF
680pF
C98
FROM SH. 2
LEFT HP
TO SH. 5
+15
680pF
C85
C110
0.1
GND
C87
C89
7.15K
+15
R102
7.15K
R101
GND
30.1K
20K
R105
R80
5.11K
GND
GND
R103
GND
-15
GND
470pF
20K
GND
470pF
0.1
470pF
C41
GND
C42
GND
R79
-15
470pF
C39
GND
-15
C40
511
3
9
GND
C109
GND
TL074
R173
511
14
SSM2164
10
TL074 12
33.2K
R174
511
11
SSM2164
Z7D
TL074
14
2
TL072
33.2K
R171
511
6
SSM2164
3
Z7A
TL074 5
1
33.2K
R172
2
Z24A
841
SSM2164
6
Z7B
7
R109
33.2K
15
Z24D
13
9
Z7C
8
R110
10
Z24C
12
13
680pF
RIGHT F2
20K
3
Z27A
1
R107
7
Z24B
5
2
411
R108
16
100K
680pF
680pF
C82
FROM SH. 2
R74
+15
84
RIGHT HP
TO SH. 5
+15
680pF
R182
0.1
GND
C70
C81
C60
C102
7.15K
+15
R100
7.15K
R99
LEFT MID
TO SH. 5
RIGHT MID
TO SH. 5

H:\MX23\100459-4.SCH 22-Jan-1998
FROM SH. 2
FROM SH. 2
20K
GND
3
Z18A
-15
4
TL072
22/25
R134
100K
GND
100
S HEADRICK R JEFFS
ACTION:
NO CHANGE TO PART,
NEW DOC# FJ 16JAN98
1
R133
2
C56
R131
8
+15
47pF
C55
GND
10K
1
R127
20K
R128
R132
20K
GND
+
3
2
J5
XLR MALE
10KA
R2B
GND
4 6
5
22/25
C52
6.81K
R126
R125
20K
GND
5
6
Z18B
47pF
C53
TL072
7
22/25
R130
C54
100K
R129
100
LEFT LP OUT
LEFT LP
30.1K
R135
GND
-15
4
TL072
C57
.33
GND
.033
C59
GND
6
TL072
100 Hz FILTER
SUBWOOFER
IN/OUT
1P2T
S2
22/25
3
Z19A
5.11K
37.4K
6.04K
Z19B
7
1
R137
R138
R139
5
C125
2
8
.33
5.11K
R136
+15
CW
25K TRIM
C58
R176
LEVEL
LEVEL
SUB OUT
GND
30.1K
LOW OUT
GND
-15
4
TL072
R124
100K
R115
3
22/25
100
20K
Z17A
1
R123
2
C50
R121
8
+15
47pF
C49
GND
R122
10K
1
XLR MALE
20K
20K
+
3
2
J4
10KA
R2A
GND
1 3
2
22/25
6.81K
R114
R116
R117
GND
20K
5
6
Z17B
R118
47pF
C47
TL072
7
22/25
C48
R120
100K
GND
R119
100
RIGHT LP OUT
RIGHT LP
C46
CHECKED BY:DRAWN BY:
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Mukilteo WA 98275-5098
SHEET:
4 5
SCHEM: LOW/SUB OUTS MX 23
of
100459
GND
GND
-15
100K
4
TL072
R159
3
22/25
100
20K
Z21A
1
R158
2
C69
R156
8
RIGHT
+15
47pF
C68
10K
GND
20K
R157
20K
GND
+
3
1
2
J7
XLR MALE
6.81K
R150
R151
R152
20K
GND
5
6
47pF
100K
C66
R155
Z21B
TL072
22/25
100
7
C67
R154
R153
MONO SUB OUT

H:\MX23\100459-5.SCH 22-Jan-1998
0.1
0.1
0.1
C119
C108
C97
0.1
0.1
0.1
C118
C96
C95
GRN
LINECORD
FROM SH. 3
LEFT MID
FROM SH. 3
RIGHT MID
C90
0.1
C101
0.1
0.1
0.1
0.1
0.1
0.1
C99
C100
C91
C93
C83
DECOUPLING CAPS
C92
0.1
C94
0.1
C84
0.1
C86
0.1
C88
0.1
J10A
J10B
.4
H
N
WHT
BLK
FOR 230V)
(150 mA
W2
W3
FOR 120V
190mA
.4
W1 .4
-15
S HEADRICK R JEFFS
NEW DOC# FJ 16JAN98
CHECKED BY:DRAWN BY:
10802 47th Avenue West
Mukilteo WA 98275-5098
SHEET:
5 5
SCHEM: MID/HI OUT/PS MX 23
of
+15
-15
+15
150-063
SHIELD
SHIELD
GND
4004
81
W38
W37
D4
ACTION:
NO CHANGE TO PART,
GND
2200/35
0.1
7915
Q1B
4004
+
C106
C78
0.01
7.5K
C122
R192
S3A
D6
2 7
63
GND
4004
2200/35
0.1
C120
0.1
C121
0.1
100459
10/16
C107
+
10/16
J9A
P1
120V UNITS 230V UNITS
ONLYONLY
0.01
C76
R191
7.5K
2P2T
S3B
D3
+
C104
C77
+
C105
J9B
GND
4 5
T1
POWER SUPPLY
4004
D5
7815
Q1A
-15
GND
GND
100K
-15
4
TL072
22/25
R73
GND
R169
100K
3
100
4
TL072
20K
Z32A
1
R98
3
22/25
100
R94
2
C38
20K
Z22A
1
R168
8
C75
47pF
R166
2
100K
R70
R145
GND
6.81K
C114
22/25
GND
6.81K
C62
22/25
R188
100
R141
100
R190A
10KA
1 3
2
22/25
C33
R87
20K
5
6
Z31B
TL072
7
C34
R95
10KA
R3A
1 3
2
22/25
C61
R140
20K
5
6
Z20B
TL072
7
C63
R144
FROM SH. 3
RIGHT HP
R190B
+15
C117
GND
10K
R69
3
1
XLR MALE
20K
20K
+
2
J11
10KA
GND
4 6
5
22/25
6.81K
R189
R92
20K
GND
5
6
Z32B
R93
47pF
C116
TL072
7
22/25
C37
100K
R72
GND
R97
100
LEFT MID OUT
C36
R91
GND
GND
3
-15
4
TL072
22/25
100K
R71
100
FROM SH. 3
20K
Z31A
1
R96
2
C35
R90
8
+15
47pF
LEVEL
10K
C115
MID
OUT
GND
R88
20K
GND
20K
R61
R89
GND
RIGHT MID OUT
+
3
1
2
J3
XLR MALE
47pF
LEFT HP
10KA
R3B
GND
4 6
5
22/25
C71
GND
20K
C74
10K
20K
R167
+15
8
47pF
GND
R162
R163
GND
47pF
100K
6.81K
C72
R165
R161
6
22/25
100
20K
Z22B
7
R164
5
TL072
C73
R160
GND
GND
-15
100K
4
TL072
R149
3
22/25
100
20K
2
Z20A
1
C65
R148
R146
8
+15
47pF
LEVEL
C64
10K
OUT
GND
HIGH
20K
20K
R147
GND
R142
R143
47pF
GND
100K
-15
0.1
C80
GND
POWER
Y
C79
0.1
R177
5.11K
D8
+15
LEFT HP OUT
+
3
1
2
J8
XLR MALE
RIGHT HP OUT
+
3
1
2
J6
XLR MALE