LIMITED WARRANTY
This product is warranted to the original consumer purchaser to
be free from defects in materials and workmanship under normal installa-
tion, use and service for a period of one (1) year from the date of purchase
as shown on the purchaser’s receipt.
MX51 MINI MIX 2
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
• 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
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.
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 ampli-
fier, has two RCA and one 1/4" output.The
MX51 is powered by an included 12 VDC
adapter.
This one-year warranty is in lieu of all expressed warranties,
obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGA-
TIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN DURA-
TION 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 SPE-
CIAL, 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.
Rolls Corporation
Salt Lake City, UT
9/95
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INTRODUCTION
OPERATION
Thank you for your purchase of the MX51 Mini-Mix II.The MX51 is a four
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 mixed to mono. Channel 2 has both RCA and 1/4" inputs.The unit
also features a headphone output that will drive up to 600 Ω headphones
with full frequency response. The MX51 is intended for professional
applications and has an FR4 glass epoxy circuit board and vinyl lami-
nated 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 amplifica-
tion is not desirable.
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.
SPECIFICATIONS
Input Impedance:
CH 1 Gain:
Ch2 Gain:
Ch 3 and 4 Gain:
Output:
10K Ω unbalanced each jack
32 dB 1/4" jack (highest gain)
26 dB 1/4" and each RCA
26 dB each RCA
1/4" stereo and stereo RCA
>90 dB
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.
S/N Ratio:
THD:
<.008%
IMD(SMPTE):
Power:
<.008%
12 VDC adapter
Weight:
1 lbs. (.45 Kg)
Size:
3" x 5" x 1.25" (8 x 13 x 3.2 cm)
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.
R1
C1
1U
J5
P4
P100K
4.7K
PHONE 1/4
CH
1
C2
25PF
4558
R2
2
3
10K
1
U1A
C11
R4
J4
4
25PF
10K
+B
PHONE 1/4
100K
R7
OUTPUT
CH 3
INPUT
CH 2
INPUTS
CH 1
INPUT
DC PWR
INPUT
CH 4
INPUT
J6
22K
PHONE 1/4
R10
C9
25PF
LINE/HDPHONE
+V
CH
2
+V
4558
6
8
J3A
C3
1U
C5
47U
4560
8
R5
J2B
RCAX4 PC
RCAX4 PC
7
6
5
10K
U1B
1
P3
P100K
5
7
4
6
U2B
R3
3
+B
R16
51
LINE OUTS
MINI- MIX II
10K
+B
R6
10K
2
+B
5
MX51
C4
J3B
RCAX4 PC
1U
R8
10K
4
6
P2
P100K
R13
100K
CH
3
10K
R9
5
+B
C10
25PF
4560
J2A
2
3
RCAX4 PC
1
R11
10K
U2A
P1
1
3
R14
10K
P100K
CH4
4
C6
1U
+B
10K
R12
2
+B
+V
LINE/
HEADPHONE
OUTPUT
CH 4
LEVEL
CH 3
LEVEL
CH 2
LEVEL
CH 1
LEVEL
D2
R19
10K
+B
1N4001
J1
2
3
1
R18
10K
C12
47U
C7
1000 UF
JAPDC
ROLLS CORPORATION
IN 9-15 VAC/VDC
Title
ROLLS MX51 MINI MIX
2
Size
Document Number
REV
A
MX51
Date:
August 31, 1994
Sheet
of
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