Rolls MX442 owner manual Specifications, Ein, Thd

• 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 ohms
Max Input Level:	+14 dBm
Output Level:	+20 dBV max
Max Gain:	70 dB
Phantom Power:	+48 VDC (Individually switchable)
Slate Tone:	20 Hz
Level/Setup Tone:	400 Hz
Low Cut switch:	100 Hz
EIN:	-128 dB
THD:	<.003%

SCHEMATIC

TP50K

V+

TP1

C33

R8

22K

V+

V+

SW12F PHAN

R111

C111

8

R3

V+

U9

P14B

33K

120PF

100K

1

4

P100KX2

.047

R22

R20

DIP6

GAIN

5

TL062

5

1M

22K

PIN2"HOT" 2

R72

C103

R108

30

R110

U1B

7

R1

R2

SLATE

Q3

HD1B

6

100K2

3

4

6

503

4.7K

22K

22K

2N3904

C32

SLATEMIC

HD2

SW16A

R107

C105

R21

2

4PDT

J5

R103

R102

4.7K

470U

C10K

P9

VTL5C3

R6

100K

.047

1

2

3

XLRJACKM

R101

10K

+VB

R113

100

C1

HD1A

6.8K

SW1A

P1

P100K

P5

R71

47PF

R12 1K

HD2

33K

6.8K

DPDT C104

Q101

2N5087

P100K

1

C1013

V+

3

470PF

2N5087

C106

R78 470

2

100

8

R11

C2 10U

J1

1

Q102

102

R112

+VB

6

4560

R10

10K

4

3

1

V+

2 10UFNP

1

R105

R109

1K1%

C107

C108

SW2A

7

10K

2

4560

R13

C3

R79

5

R81

SW1B

1K1%

120PF .047

DPDT

5

U4B

U4A

1

10K

6

10K

C10210UFNP4

R106

2K

+VB

3

R4

R5

3

SW16B

R80

R51

5 +VB

2K

2

22K

22K

1K

10U

4PDT

470

22K

6

C110

1

+VB

XLRFPC

C21

R9

+VB

470PF

SW12B

BALIN

C109

10K

R441M

R104

10K

DPDT

MONO

4

R46

C12

R41

C8

10U

V+

DIP6

47U

THRSH

22K

.01

47K

.15

SW12E PHAN

R211

C211

TP50K

C20 SW12A

R47

R42

2N3904

33K

120PF

R65

10U

DIP6

C13

SW10

C9

DIP6

GAIN

3

TL062

Q404

400HZ 22K

.012

Q2

47K

.15

Q1

C203

R208

30

R210

2

U1A

1

2N3904

3

1

R48

J113

R43

503

4.7K

R14

R15

C14

C10

C205

R18

22K

SW SPST

47K

R203

R207

C10K

CR4

.012

.15

4.7K

470U

R49

R50

20HZ

R202

10K

+VB

4 R213

P10

22K

22K

470K

C4

1N4148

C15

1M

3.3K

C11

R45

R201

6.8K

SW3A

P2

.012

.15

100K

33K

R19

.047

6.8K

2N5087

P100K

P6

R415

SW11A2

C201

3

DPDT C204

P100K

R55

10K

3

470PF

2N5087

C206

470K

47K

DPDT

J2

1

2

Q201

Q202

102

+VB

2

1

P100KX2

R25

C6

R212

VTL5C3

2

10

SW16D

1

10UFNP

R205

C207

R16

R17

P14A

1

2

SW3B

1K1%

R209

1K1%

120PF

C208

SW4A

U3

1

3

R24

1K

10U

R76

R74 12

11

J6

C20210UFNP4

R206

2K

.047

DPDT

4PDT

3

22K

22K

470

10K

XLRJACKM

5 +VB

+VB

3

2

R3

R23

10K

2K

C5

C210

100

SW16C

XLRFPC

6

1

47PF

2

4560

R26

C7

7

BALIN

470PF

C209

U5A

1

8

R204

10K

DPDT

10U

V+

10K 3

R75

R77

BALOUT

9

2

SW12D PHAN

V+

V+

8

+VB

1K

10U

470

4PDT

LEFT

GAIN

R311

C311

8

6

4560

2N3906

10K

33K

120PF

TL062

3

4

R67

4

DIP6

5

U5B

7

10K

V+

C37

.047

D3

R308

30

R310

7

5

500 HD3A

M1

C303

6

U2B

R66 V+

Q5

R6922K

503

C305

4.7K

R27

R28

HD5

10K

1N34A

R52

R307

470U

R70

R37

P100KX2

1

1

R303

C10K

+VB

MA

4.7K

10K

P13A

R302

100

D6

2

10K

+VB

R313

22K

22K

Q4 2N3904

3

1

HD5

R301

6.8K

SW5A

2N5087

P3

33K

P11

V+

1N4148

HD4A

METERVU

HD4B

6.8K

Q301

P100K

P7

8

C39

HD5

DPDT

C304

R68 10K

C301 3

C16

10U

3

470PF

2N5087

C306

C307

P100K

2

4560

HD5

J3

2

6

47U

1

Q302

102

+VB

STEREO

2

7

HD3B

R312

120PF

U6B

1

10UFNP

R305

R29

R30

MONO

3

5

2

2

1K1%

R309

1K1%

C308

SW6A

LEFT

4

R38

+VB

SW5B

R306

2K

.047

DPDT

RIGHT

5

1

+VB

AUXOUT/

C30210UFNP4

2K

+VB

3

22K

22K

MONITOR

6

50

HDPHN

SW11

R304

5 +VB

2

R31

R32

SW13A

R39

P100KX2

J9

SW MOM

HD3C

C310

XLRFPC

6

1

SW DP5TROT

10K

P13B

3

470PF

BALIN

V+

C309

10U

6

4

BATT

10K

DPDT

22K

22K

HD5

SW12C PHAN

GAIN

R411

C411

P12

P8

R35

1

C38

R40

V+

33K

120PF

100K

5

50

TL062

.047

4560

DIP6

R408

30

R410

3

P100K

P100K

PHONE1/4

2

2

1

C403

4.7K

U2A

1

C37 .047

J7

3

U6A

4

503

C405

2

+VB

4

6

3

C17

P15

P4

R403

R407

470U

C10K

R33

R34

5

SW13B

+VB

47U

5KTRIM

HD3D

R402

4.7K

SW DP5TROT

10K

+VB

4 R413

4

D5

HD3E

M2

HD5

R401

6.8K

33K

22K

22K

R36

C38

V+

1N4148

HD5

6.8K

100K

5

5

C404

2N5087

C25

R60

C26

.047

HD5

C401 3

120PF

AUXIN

4

D4

MA

4

3

470PF

2N5087

C406

500

HD4E

HD4D

SW7A

1458

1N34A

J4

1

2

Q401

Q402

102

2

R53

HD5

47K

1U

1

C18

METERVU

10UFNP

DPDT

R412

CR6

U8A

C40

R405

C407

CR7

PHAN

3

1

2

1K1%

C408

SW8A

R592

4560

CR8

10U

SW7B

1K1%

R409

120PF

C27

1N4148

1N4148

R63

C19

J8

.047

DPDT

1

1U

PHONE1/4

C40210UFNP4

R406

2K

+VB

3

100K

U7A

100K

R404

5 +VB

2K

2

3

MONITOR

C410

1U

1N4148

C29

1U

6

C409

1

CR5

XLRFPC

C28

1U

BALIN

SW9

MPSA05

470PF

10U

1N4148

ROLLS CORPORATION

10K

DPDT3

1

Q403 V+

R57

V+

4

R61

R62

V+

1U

1458

+VB

V+

C41

J10

2

R58

8

100K

100K

6

R64

503

5968 South 350 West

2BT1

22K

7

Salt Lake City,UT 84107

SPST

R56

R73

22K

4560

U8B

100K

C23

3

4.7K D2

6

5

C36

Title

ROLLS FIELD MIXER MX442

12-16VDC

D1

7

1

C22

U7B

503

503

TIPNEG

+18V

1K

C24

5

Size:

Document Number:

Rev:

JAPDC

1KUF

LDRR

+VB

8

C34

C35

MX442SCH

B

1N4001

47U

503

503

Rb

Sheet 0 of

0

Date: 19-Jul-2000

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