4

• The DIP switches

The 6-DIP switch located on the rear panel provides phantom power for each individual microphone input, selects mono or

stereo output operation, and activates the internal limiter. The limiter is used to compress the overall MX442 signal to a level

which will not exceed +4 dB. Note that this limiter may be adjusted by the screwdriver potentiometer located between the

Channel 3 and Channel 4 Pan pots. If the MX442 is being used in an area where there is a wide dynamic range of sounds

(the sound varies from very quiet to very loud), the limiter is used to keep the signal within a certain manageable range. The

Mono/Stereo switch, when in the Mono (down) position, both the Right and Left outputs are summed together. Finally,

switches 3 through 6 provide the indicated channel with +48 volts of phantom power to power condenser type microphones.

SPECIFICATIONS

Input Impedance: 10k ohms bal./unbal.Output Impedance: 50 ohmsMax Input Level: +14 dBmOutput Level: +20 dBV maxMax Gain: 70 dBPhantom Power: +48 VDC (Individually switchable)Slate Tone: 20 HzLevel/Setup Tone: 400 HzLow Cut switch: 100 HzEIN: -128 dBTHD: <.003%

0

ROLLS CORPORATION

5968 South 350 West

Salt Lake City,UT 84107

019-Jul-2000

Title

Size:

Date:

Rev:

Sheet of

Rb

PHAN
PHAN
LE F T
V+
V+
V+
M O NI T O R
+VB
+VB
BA L OU T
BA L IN
12 - 1 6 V DC
TI P N EG
GA IN
+VB
+VB +VB
+VB
+VB
+VB
+VB
V+ V+
BA T T
AU X IN
PHAN
+VB
+VB
BA L IN
GA IN
+VB
V+
PHAN
+VB
+VB
BA L IN
GA IN
+VB
V+ V+
PHAN
+VB
+VB
BA L IN
GA IN
+VB
V+
SL A T E
+VB
V+
V+
V+
V+
V+
V+
ST E R E O
M O N O
LE F T
RI G H T
40 0 H Z
20 H Z
M O N O
SL AT E M IC
V+
V+
V+
V+
AU X OU T/
HDPHN
TH R S H
M O NI T O R
46
5
P1 3 B
P1 00 K X 2
Q4 03
M P S A 05
1 2
3
J1
XL R F P C
12
3
SW 1 A
DP D T
45
6
SW 1 B
DP D T
R1 0 1
6. 8 K
R1 0 2
6. 8 K
R1 0 3
10 K
R1 0 5
1K 1%
R1 0 7
4. 7 K
R1 1 2
1K 1%
C1 0 6
10 2
C1 0 7
12 0 P F C1 0 8
.0 4 7
C1 1 0
47 0 P F
C1 1 1
12 0 P F
R2 0 1
6. 8 K
R2 0 2
6. 8 K
R2 0 3
10 K
C2 0 3
50 3 R2 0 7
4. 7 K
C2 1 1
12 0 P F
C2 0 6
10 2
C2 0 7
12 0 P F C2 0 8
.0 4 7
R2 1 2
1K 1%
C2 1 0
47 0 P F
C2 0 4
47 0 P F
C3 0 4
47 0 P F
C3 0 3
50 3
R3 0 3
10 K
R3 0 1
6. 8 K
R3 0 2
6. 8 K
R3 0 4
10 K
R3 0 5
1K 1%
R3 0 7
4. 7 K
C3 1 1
12 0 P F
C3 0 6
10 2
R3 1 2
1K 1%
C3 1 0
47 0 P F
R3 0 6
2K
C3 0 8
.0 4 7
Q3 02
R4 0 1
6. 8 K
R4 0 2
6. 8 K
R4 0 3
10 K
R4 0 4
10 K
R4 0 5
1K 1%
R4 0 7
4. 7 K
C4 1 1
12 0 P F
C4 0 6
10 2
C4 0 9
10 U
C4 0 7
12 0 P F
C4 1 0
47 0 P F
R4 1 2
1K 1%
12
3
SW 2 A
DP D T
12
3
SW 3 A
DP D T
45
6
SW 3 B
DP D T
12
3
SW 4 A
DP D T
12
3
SW 5 A
DP D T
45
6
SW 5 B
DP D T
12
3
SW 6 A
DP D T
45
6
SW 7 B
DP D T
12
3
SW 8 A
DP D T
1 2
3
J2
XL R F P C
1 2
3
J3
XL R F P C
1 2
3
J4
XL R F P C
2
31
4
U4 A
45 6 0
6
57
8
U5 B
45 6 0
2
31
4
U5 A
45 6 0
6
57
8
U4 B
45 6 0
4 6
5
P1 4 B
P1 00 K X 2
R9
10 K
R1 0
10 K
R1 1
10 K
R1 3
1K
R2 3
10 K
R2 4
10 K
R2 5
1K
R2 6
1K
P7
P1 0 0 K
P8
P1 0 0 K
1
23
SW 1 1 A
DP D T
J9
J8
PH O NE 1/4
2
31
4
U7 A
45 6 0
31
2
SW 9
SPST
2
3
1
J1 0
JA P D C
P4
C1 0 K
C3
10 U
C4
.0 4 7
C6
10 U
C7
10 U
C1 8
1U
C2 0
10 U
C2 1
47 U
R5 7
22 K R5 8
22 K
R6 0
47 K
C2 6
1U
C2 7
1U
C2 8
1U
C2 9
1U
CR7
1N 4 1 4 8 CR8
1N 4 1 4 8
CR6
1N 4 1 4 8
CR5
1N 4 1 4 8
R6 1
10 0 K
R6 2
10 0 K
C2 5
12 0 P F
R5 9
10 0 K
BT 1
+1 8 V
D1
1N 4 0 0 1
R5 6
1K C 2 2
1K U F C2 4
47 U
6
57
8
U7 B
45 6 0
C4 0 3
50 3
12
3
SW 7 A
DP D T
C4 0 4
47 0 P F
Q4 02
C1 0 3
50 3
P5
P1 0 0 K
P6
P1 0 0 K
P9
P1 0 0 K
C1 9
1U
R3 6
10 0 K
R3 5
10 0 K
6
57
8
U6 B
45 6 0
2
31
4
U6 A
45 6 0
R4 9
1M
P1 0
P1 0 0 K
P1 1
P1 0 0 K
R2 1 0
4. 7 K
R2 0 8 3 0
R4 0 8 3 0
R3 0 8 30
R1 0 8 3 0
C1 0 4
47 0 P F
C1 0 5
47 0 U
C2 0 5
47 0 U
C3 0 5
47 0 U
Q3 01
2N 5 0 8 7
C4 0 5
47 0 U
R4 0 9
2K
R4 0 6
2K
5
6
7
8
U8 B
14 5 8
C3 7 . 0 47
C3 8
.0 4 7
R6 3
10 0 K
R6 4
10 0 K
C4 0 8
.0 4 7
TP 1
TP 5 0 K
C3 3
.0 4 7
Q3
2N 3 9 0 4 C3 2
.0 4 7
R1 2 1K
C2 10U R7 8 4 7 0
R7 9
10 K R8 1
10 K
R8 0
47 0
R5 1
22 K
R7 4
10 K
R7 6
47 0
R7 5
47 0
R7 7
10 K
2
HD 1 B
HD2
1HD 1 A
HD2
12
3
SW 1 6 A
4P D T
45
6SW 1 6 B
4P D T
10 11
12
SW 1 6 D
4P D T
78
9
SW 1 6 C
4P D T
3
HD 3 C
CR4
1N 4 1 4 8
R4 1 5
10 K
R4 1
47 K
R4 2
47 K
R4 3
47 K
R4 5
10 0 K
C8
.1 5
C9
.1 5
C1 0
.1 5
C1 1
.1 5
R5 0
3. 3 K
C1 2
.0 1
R4 6
22 K
R4 7
22 K
R4 8
22 K
R1
22 K
R2
22 K
R4
22 K
R5
22 K
R1 4
22 K
R1 5
22 K
R1 6
22 K
R1 7
22 K
R2 7
22 K
R2 8
22 K
R2 9
22 K
R3 0
22 K
R3 1
22 K
R3 2
22 K
R3 3
22 K
R3 4
22 K
R7 2
10 0 K
Q4 04
2N 3 9 0 4
1 3
2
P1 4 A
P1 00 K X 2
R3
10 0 K
R8 2 2 K
R2 2
1M
R2 0
22 K
R2 1
10 0 K
3
2
1
4
U8 A
14 5 8
3
21
4
U2 A
TL 0 6 2
5
67
8
U2 B
TL 0 6 2
3
21
4
U1 A
TL 0 6 2
5
67
8
U1 B
TL 0 6 2
5
HD 3 E
HD5
4
HD 3 D
HD5
2
HD 3 B
HD5
1
HD 3 A
HD5
1
HD 4 A
HD5
2
HD 4 B
HD5
4
HD5
HD 4 D
5
HD 4 E
HD5
R6
10 0 C 1
47 P F
Q1 02
R1 1 0
4. 7 K
P1
C1 0 K
R1 0 9
2K
R1 0 6
2K
C1 0 9
10 U
P2
C1 0 K
Q2 02
R2 0 9
2K
R2 0 6
2K
R2 0 5
1K 1%
R2 0 4 10 K
R1 0 4 1 0 K
Q2 01
2N 5 0 8 7
Q1 01 2N 5 0 8 7
R3 1 0
4. 7 K
P3
C1 0 K
R3 0 9
2K
C3 0 9 1 0 U
C3 0 7
12 0 P F
C2 0 9 10 U
R4 1 0
4. 7 K
Q4 01
2N 5 0 8 7
R1 9
47 0 K
R1 8
47 0 K
R5 5
47 K
R6 5
TP 5 0 K C 1 3
.0 1 2
C1 4
.0 1 2
C1 5
.0 1 2
R3
10 0 C 5
47 P F
R3 7
10 K
R5 2
50 0
13
2
P1 3 A
P1 00 K X 2
C3 9
10 U
C4 0
10 U
D2
LD R R
R7 3
4. 7 K
R1 1 3
33 K
R1 1 1
33 K
R2 1 1
33 K
R2 1 3
33 K
R3 1 1
33 K
R3 1 3
33 K
R4 1 1
33 K
R4 1 3
33 K
P1 2
P1 0 0 K
R6 6
10 K
R6 7
10 K
Q4 2N 3 9 0 4
Q5
2N 3 9 0 6
R7 1
10 0
R7 0
10 0
C1 6
47 U
R3 8
50
R4 0
50
C1 7
47 U
1
2
4
3
U9
VT L 5 C 3
1
2
4
3
U3
VT L 5 C 3
R5 3
50 0
P1 5
5K TR IM
R6 9 2 2 K
R6 8 10K
D6
1N 4 1 4 8
D3
1N 3 4 A
D5
1N 4 1 4 8
D4
1N 3 4 A
R3 9
10 K
2
3
5
61
4
SW 1 3 A
SW D P5 TR OT
1
2
4
56
3
SW 1 3 B
SW D P5 TR OT
J7
PH O NE 1/4
C3 7 .04 7
C3 8
.0 4 7
C2 3
50 3
C3 4
50 3
C3 5
50 3
C4 1
50 3
C3 6
50 3
SW 1 2 F
DI P 6
SW 1 2 E
DI P 6
SW 1 2 D
DI P 6
SW 1 2 C
DI P 6
SW 1 2 B
DI P 6
SW 1 2 A
DI P 6 SW 1 0
SW SPST
1
2
3
J5
XL R JAC K M
12
3
J6
XL R JAC K M
M A
M 1
M A
M 2
C1 0 1
10 UF N P
C1 021 0U F NP
C2 0 1
10 UF NP
C2 021 0U F NP
C3 0 1
10 UF N P
C3 02 10U F NP
C4 0 1
10 UF N P
C4 021 0U F NP

ROLLS FIELD MIXER MX442

B
Q2
J1 1 3
PI N 2 "H OT "
V+
R4 4 1 M
2N 3 9 0 4
Q1
M ETE R VU
SW 1 1
SW M O M
HD5
M ETE R VU

Document Number:MX442SCH

+VB

+VB
+VB
+VB
2N5087
2N5087
+VB
2N5087
+VB
2N5087

SCHEMATIC