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Rolls MiniMixII MX51s User Manual

Mx51s minimix ii, Mx51s 4-channel mix er, Mx51s mini mix 2

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MX51s 4-Channel Mix

er

Rolls Corporation

Salt Lake City, UT

05/2008

- Install

- Studio

- Live

... anywhere you need to mix up to four line

signals to a mono output.

SCHEMATIC

MX51s MiniMix II

MX51s MINI MIX 2

- For mixing a microphone XLR input with up to three

RCA input signals

- Four channels total

- Line / Headphone output level
- ROLLS PS27 AC adapter included

The MX51s Mini Mix 2 is small four-channel mixer with individual

volume controls, and a headphone / line output. The unit has one

XLR input along with an 1/8” input and 3 sets of stereo RCA inputs.

It has enough gain and output level to connect to a power amplifi er,

with either RCA or 1/8” jacks. The MX51 is powered by an included

ROLLS PS27 12 VDC adapter.

SPECIFICATIONS
Input Impedance:

10K

Ω unbalanced each jack

CH 1 Gain:

32 dB XLR jack (highest gain)

Phantom Power: for CH 1 microphone XLR
Ch2 Gain:

26 dB 1/8" and RCA

Ch 3 and 4 Gain:

26 dB each RCA

Output:

1/8" stereo and stereo RCA

S/N Ratio:

>90 dB

THD:

<.008%

IMD(SMPTE):

<.008%

Power:

ROLLS PS27 12 VDC adapter

Weight:

1 lbs. (.45 Kg)

Size:

3" x 5" x 1.25" (8 x 13 x 3.2 cm)

INTRODUCTION

Thank you for your purchase of the MX51s Mini-Mix II. The MX51s
is a four channel mixer designed for Audio and Visual applications.
Channels 1 has a microphone XLR input with switchable phantom
power. Channel 2 has 1/8” and RCA inputs. Channels 3 and 4 have
RCA jacks. The unit also features a 1/8” headphone output that
will drive up to 600

Ω headphones with full frequency response.

The MX51s is intended for professional applications. It has an FR4
glass epoxy circuit board, vinyl laminated steel chassis bottom and
a powder coated top. All inputs except CH 1 microphone are stereo.
All outputs are true stereo.

DESCRIPTION
DC PWR: For connection to the ROLLS PS27 power supply.
OUT: Stereo RCA jacks for connection to a mixer or amplifi -
cation device.
CH 4 and CH 3 INPUT: Stereo RCA jacks for connection to a
signal source such as a CD player, cassette deck, tuner, etc.
CH 2 INPUTS: Stereo RCA and one 1/8” jacks (paralleled)
for connection to a signal
source such as that men-
tioned for Channels 3 and
4, or to a source such as
a wireless microphone or
instrument.
CH 1 INPUT: XLR jack
for connection to a micro-
phone. Switchable jumper
phantom power as labeled on unit.
LINE/HEADPHONE OUTPUT: 1/8” Stereo jack for connec-
tion to a mixer, amplifi er or stereo headphones.
CH 1 - 4 LEVEL: Adjusts the volume level of each channel.

OPERATION
To operate the MX51s, properly connect cords from the
sources to be mixed (mics, cassette decks, CD players etc.)
into the channel inputs. Connect the outputs to an ampli-
fi cation device or sound system. Adjust the channel level
controls for the desired volume. For private listening, plug
stereo headphones into the LINE/HEADPHONE OUTPUT
on the MX51s front.

WARRANTY
For information on the Rolls One Year Limited Warranty, and
to register this product, visit our website at www.rolls.com

MX51s

STEREO LINE MIXER

PHANTOM

CH 1

INPUT

CH 2

INPUTS

CH 3

INPUT

CH 4

INPUT

OUTPUT

CH 1

CH 2

CH 3

CH 4

LEVEL

LEVEL

LEVEL

LEVEL

LINE/

HEADPHONE

OUTPUT

+

-

12V DC

POWER

1

Rolls Corporation

5968 S 350 W
Murray Utah 84107

1

MX51S.SCH

A

9 NOVEMBER 2007

Title

Size:

Document Number:

Date:

Rev:

Sheet

of

M51S 4CH MIXER PLUS

FXa

+B

+B

+B

LINE/HDPHONE

LINE OUTS

+V

+V

+V

CH 4

CH 3

CH 2

CH1

IN 9-15 VAC/VDC

P4
P100K

1

2

3

J2A

RCAX4 PC

2
3
1

J1

JAPDC

C6

1U

R3
1K

R7

100K

R4

10K

C1

1U

4

5

6

J3B

RCAX4 PC

R6

10K

R8

10K

1

2

3

J3A

RCAX4 PC

R9

10K

R11

10K

4

5

6

J2B

RCAX4 PC

R10

10K

R12

10K

R13

100K

R14
3.3K

C3

47U

D2

1N4001

R19

18K

R18

22K

C12

47U

C7

1000 UF

R20

100

R14

1K

2

3

1

4

U1A

4560

6

5

7

8

U1B

4560

R10
3.3K

C2 27PF

C9

27PF

1

2

3

J5

XLR F PC

J4

3.5STJK

J6
3.5STJK

C5

47U

R5

10K

R16

100

1

3

2

P1A
P100K X2

1

3

2

P3A
P100K X2

1

3

2

P2A
P100K X2

4

6

5

P3B
P100K X2

4

6

5

P2B
P100K X2

4

6

5

P1B
P100K X2

T1

XFMRAUDIO

1

H1A
HD3

2

H1B
HD3

3

H1C
HD3

R17

100K

Q1

2N3904

C4

47U

1

H2A

HD3

2

H2B

HD3

3

H2C

HD3

MONO

STEREO

PHANTOM

C8
10U

C101U

R21
10K

R22
100K

Q2
2N3904

+B

R15
4.7K

D1

LDRR