6
-
+
1
2
3
J_08
R_02
R_05
R_01
R_03
C_01
C_02
-
+
U_09B
C_08
C_09
R_15
R_14
R_13
-
+
U_08A
-
+
U_09A
-
+
U_06A
-
+
U_05A
-
+
U_05B
C_31
C_26
C_28
C_29
-
+
U_06B
-
+
U_14A
C_15
C_22
RN_09-1
R_20
R_22
R_23
R_21
R_19
-
+
U_02B
C_12
C_13
R_18
R_16
R_17
-
+
U_03A
C_23
-
+
U_04A
-
+
U_04B
C_14
-
+
U_02A
-
+
U_03B
C_11
C_16
C_17
C_19
-
+
U_10B
-
+
U_10A
R_55
R_54
R_52
RN_09-7
-
+
U_14B
R_43
R_44
R_49
R_72
R_71
C_64
C_52
RN_09-6
R_06
C_56
C_66
R_79
R_80
R_51
R_48
R_47
-
+
U_16B
R_12
R_64
R_66
R_67
R_07
-
+
U_16A
C_04
C_30
C_27
R_11
R_10
-
+
U_07A
R_38
R_37
R_40
R_39
R_42
R_41
R_36
R_35
C_34
C_32
C_35
C_37
C_06
-
+
U_07B
R_09
R_08
-
+
U_01B
-
+
U_08B
C_07
-
+
U_01A
RN_09-3
RN_09-5
+
C_53
+
C_57
VR_01
R_53
R_56
R_57
VR_03
R_65
R_68
R_69
1
2
3
J_06
SW3
1
2
3
J_05
-
+
U3A
R6
R5
C_18
C_10
C_33
C_36
C_71
J1
C5
L1
+
C2
+
C3
SW1
S1
U2
U1
+
C4
+
C1
J2
D9
D6
D5
R2
R1
D1
SW2
RN_09-4
C_05
+
C_03
RN_09
J5
J3
R4
R3
C_72
C_67
C_68
R_78
R_81
R_70
R_73
D_01
D_02
10S2125A
MX250 CLOSE COUPLED ELECTRONIC PROCESSOR
12/27/99
JRD
A
WHITINSVILLE, MA 01588
ONE MAIN STREET
NONE
1
1
REV.
DRAWING NO.
SCHEMATIC DIAGRAM
DATE:
DATE:
OF
SHEET
SCALE:
APPROVED:
DRAWN:
EASTERN ACOUSTIC WORKS
+A
-A
Q
F
F
Q
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
7
8
6
5
2
1
3
4
6
5
4
3
21
CW
CW
5
6
8
7
2
1
3
4
8
7
5
6
1
2
4
3
ALL CAPACITOR VALUES ARE MICROFARAD
UNLESS OTHERWISE NOTED ALL RESISTORS ARE 5%
RIGHT CHANNEL = "1xx" - CENTER = "2xx" - LEFT = "3xx"
PART NUMBERS WITH NO "_" PREFIX ARE UNIQUE COMPONENTS
THE "_" PART NUMBER PREFIX REFLECTS WHICH CHANNEL IS USED.
NOTES:
FREQUENCY (Hz)
TIME (S)
(Pi)Fr
2
T =
GROUP DELAY
4th ORDER HI-PASS and LO-PASS FILTERS
-9
WHEN C = .001uF
WHEN C = .01uF
-8
(8.9 x 10 )F
(8.9 x 10 )F
1
1
R =
R =
ALL-PASS
(Pi)RC
.7071
Fr =
* 14 PIN DIP RES. NETWORK
-15V TO ALL OPAMPS
+15V TO ALL OPAMPS
6-7
5
8
4
2
1
L
R
IN
OUT
IEC 320
ACINLET
3
1
2
3
2
1
3
120/240
NEUT
GROUND
HOT
POWER
240V
120V
1%
1%
1%
1%
1%
1%
1%
1%
10.0k 1%
10.0k 1%
10.0k 1%
10.0k 1%
10.0k 1%
10.0k 1%
ONE OF TWO SHOWN
BALANCED INPUTS (LEFT-RIGHT)
30K
0
0
10.0K
10.0K
10.0K
10.0K
10.0K
10.0K
10.0K
* RN_02
* RN_01 (3)
* RN_03
*
*
*
*
YEL
1.5K
1.5K
.1uF
.1uF
1.5uF
1.5uF
4003
4003
4003
4003
4003
4003
4003
4003
.1uF
* RN_08
* RN_07
*
**
*
47uF
27P
FROM LEFT-CEN-RIGHT INPUT
10K
10K
47u
47u
7915
7815
PARAMETRIC EQ.
-A
+A
Q
F
F
*
**
.01
.01
*
*
2.7K RES NET
4.99K
CENTER CHANNEL INPUT SUMMING
CENTER
LEFT & RIGHT SUM
RIGHT
LEFT
INPUT INVERTER
10K
10K
10K
10K
47NP
47NP
47NP
47NP
.1
.1
.1
.1
.1
.1
.001
.001
.001
.001
.001
.001
27p
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
.01
35V
1000
35V
1000
INPUT
10K
10K
10K
10K
10K
10K
**
**
*
*
*
10k
10k
10k
10k
10k
10k
LO IN
HI IN
180
180
180
0
0
0
680
680
680
680
4th ORDER HI-PASS
HIGH OUTPUT
LOW OUTPUT
4TH ORDER LO-PASS
4TH ORDER HI-PASS WITH VAR. "Q"
2ND ORDER ALL-PASS
4TH ORDER LO-PASS
*
*
*
*
1k
100
27p
27p
10k
10k
1k
100
27p
27p
10k
10k
100
100
1k
1k
1k
1k
1k
1k
1k
1k
Q
* R
27P
27P
27p
27p
10k
10k
10k
10k
10k
10k
(NONE)
D7
D8
D2
D3
R-U3B
L-U4A
