Rolls MX51 User Manual

CH 1

INPUT

CH 1

LEVEL

MX51

MINI-MIX II

4 Channel Mixer

LIMITED WARRANTY

This product is warranted to the original consumer purchaser to
be free from defects in materials and workmanship under normal installa­tion, use and service for a period of one (1) year from the date of purchase
as shown on the purchaser’s receipt.

The obligation of Rolls Corporation under this warranty shall be
limited to repair or replacement (at our option), during the warranty period
of any part which proves defective in material or workmanship under
normal installation, use and service, provided the product is returned to
Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products
returned to us or to an authorized Service Center must be accompanied by
a copy of the purchase receipt. In the absence of such purchase receipt, the
warranty period shall be one (1) year from the date of manufacture.

This warranty shall be invalid if the product is damaged as a
result of defacement, misuse, abuse, neglect, accident, destruction or
alteration of the serial number, improper electrical voltages or currents,
repair, alteration or maintenance by any person or party other than our
own service facility or an authorized Service Center, or any use violative
of instructions furnished by us.

This one-year warranty is in lieu of all expressed warranties,
obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGA­TIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN DURA­TION TO THE ONE YEAR DURATION OF THIS WRITTEN LIMITED
WARRANTY. Some states do not allow limitations on how long an
implied warranty lasts, so the above limitation may not apply to you.

IN NO EVENT SHALL WE BE LIABLE FOR ANY SPE­CIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR
BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR
IMPLIED, WHATSOEVER. Some states do not allow the exclusion or
limitation of special, incidental or consequential damages so the above
limitation or exclusion may not apply to you. This warranty gives you
specific legal rights, and you may also have other rights which vary from
state to state.

CH 2

INPUTS

CH 3

INPUT

CH 4

INPUT

OUTPUT

INPUT

DC PWR

CH 2

LEVEL

MX51

MINI- MIX II

CH 3

LEVEL

CH 4

LEVEL

LINE/

OUTPUT

HEADPHONE

MX51 MINI MIX 2

• For mixing up to two 1/4" inputs with
up to three RCA input signals

• Four channels total

• Line / Headphone output level

• AC adapter included

The MX51 Mini Mix 2 is small four-channel
mixer with individual volume controls, and a
headphone / line output. The unit has two 1/
4" inputs and 3 sets of stereo RCA inputs
that are mixed to mono. It has enough gain
and output level to connect to a power ampli­fier, has two RCA and one 1/4" output. The
MX51 is powered by an included 12 VDC
adapter.

Rolls Corporation

Salt Lake City, UT

9/95

Owners Manual

INTRODUCTION

Thank you for your purchase of the MX51 Mini-Mix II. The MX51 is a f our
channel mixer designed for Audio Visual and Aerobics applications.
Channels 1 and 2 have 1/4" inputs, Channels 3 and 4 have dual RCA
jacks mix ed to mono. Channel 2 has both RCA and 1/4" inputs. The unit
also features a headphone output that will driv e up to 600 Ω headphones
with full frequency response. The MX51 is intended f or professional
applications and has an FR4 glass epoxy circuit board and vinyl lami­nated steel chassis. All inputs are mono - although the RCA inputs
appear to be stereo, the signals are mixed to mono in order to have all
signals present for A/V or aerobics applications where stereo amplifica­tion is not desirable .

DESCRIPTION

DC PWR: For connection to the power supply.
OUT: Stereo RCA jacks (mono signal) for connection to a mixer or
amplification 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 1/4" jacks (paralleled) for connection
to a signal source such as that mentioned for Channels 3 and 4, or to a
source such as a wireless microphone or instrument.
CH 1 INPUT: 1/4" unbalanced jack for connection to a source such as a
wireless microphone or instrument.
LINE/HEADPHONE OUTPUT: 1/4" Stereo jack for connection to a mixer,
amplifier or stereo headphones.
CH 1 - 4 LEVEL: Adjusts the volume level of each channel.

DC PWR

INPUT

OUTPUT

CH 4

INPUT

CH 3

INPUT

CH 2

INPUTS

CH 1

INPUT

MINI- MIX II

MX51

LINE/

HEADPHONE

OUTPUT

CH 4

LEVEL

CH 3

LEVEL

CH 2

LEVEL

CH 1

LEVEL

OPERATION

To operate the MX51, properly connect cords from the sources to be
mixed (wireless mics, cassette decks, CD players etc.) into the channel
inputs. Connect the outputs to an amplification 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 MX51 front.

SPECIFICA TIONS

Input Impedance: 10K Ω unbalanced each jack
CH 1 Gain: 32 dB 1/4" jack (highest gain)
Ch2 Gain: 26 dB 1/4" and each RCA
Ch 3 and 4 Gain: 26 dB each RCA
Output: 1/4" stereo and stereo RCA
S/N Ratio: >90 dB
THD: <.008%
IMD(SMPTE): <.008%
P ower: 12 VDC adapter
Weight: 1 lbs. (.45 Kg)

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

R1

C1

P4

4.7K

1U

P100K

C2 25PF

4558

2

1

U1A

3

R4

10K

C4

1U

C6

1U

D2

1N4001

1000 UF

4

+B

C3

1U

C7

U1B

P3
P100K

+B

P2
P100K

R13 100K

+B

4560

2

U2A

P1

3

P100K

4

+B

+B

R19

+V

10K

R18

10K

R2

10K

100K

R7

C9

25PF

+V

4558

8

6

7

5

R3

+B

10K

C10 25PF

1

R14

10K

+B

C12
47U

C11

25PF

22K

R10

+V

4560

8

6

U2B

5

+B

C5

47U

7

R16

51

Title

Size Document Number REV

A MX51

Date: August 31, 1994 Sheet of

J6
PHONE 1/4

4

6

ROLLS CORPORATION

ROLLS MX51 MINI MIX 2

J2B
RCAX4 PC

5

LINE/HDPHONE

LINE OUTS

CH 1

CH 2

CH 3

CH4

IN 9-15 VAC/VDC

PHONE 1/4

RCAX4 PC

RCAX4 PC

RCAX4 PC

J5

PHONE 1/4

J3A

2

5

J2A

2

J4

J3B

J1

JAPDC

R5

10K

1

3

R6 10K

R8

10K

4

6

10K

R9

R11 10K

1

3

10K

R12

2
3
1