Rolls MX51s User Manual
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-
12V DC
OUTPUT
INPUT
+
-
INPUT
INPUTS
CH 2
CH 3
CH 4
PHANTOM
POWER
CH 1
INPUT
tioned for Channels 3 and
4, or to a source such as
a wireless microphone or
instrument.
CH 1 INPUT: XLR jack
LINE/
HEADPHONE
OUTPUT
CH 4
LEVEL
STEREO LINE MIXER
MX51s
LEVEL
LEVEL
CH 1CH 2CH 3
LEVEL
for connection to a microphone. Switchable jumper
phantom power as labeled on unit.
LINE/HEADPHONE OUTPUT: 1/8” Stereo jack for connection 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 amplifi 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.
SCHEMATIC
1
2
+B
R3
1K
H1A
HD3
PHANTOM
C8
10U
C6
1U
1
HD3
2
3
C1
1U
3
H1C
HD3
MONO
R13 100K
U1A
4
Q1
2N3904
+V
R17
C4
100K
100K
47U
C9
27PF
+V
8
C3
R20
47U
100
7
U1B
4560
C2 27PF
R16
100
1
J6
3.5STJK
LINE/HDPHONE
RCAX4 PC
J2A
1
3
LINE OUTS
2
C5
47U
Rolls Corporation
5968 S 350 W
Murray Utah 84107
Title
M51S 4CH MIXER PLUS
Size: Document Number:
FXa
Date:
9 NOVEMBER 2007
MX51S.SCH
Sheet of
H1B
HD3
R7
6
5
+B
H2A
H2B
HD3
H2C
STEREO
HD3
4560
2
3
+B
C12
47U
CH 4
J5
XLR F PC
3.5STJK
CH 2
IN 9-15 VAC/VDC
J4
CH 3
RCAX4 PC
CH1
1 2
RCAX4 PC
J3A
RCAX4 PC
J1
JAPDC
R14
R10
3.3K
3
J3B
5
2
J2B
5
3.3K
XFMRAUDIO
R6
10K
4
6
R8
10K
R9
10K
1
3
R11
10K
10K
R10
4
6
R12
10K
2
3
1
C10
1U
Q2
2N3904
P4
T1
R4
10K
R5
10K
1N4001
R22
P100K
100K
R21
10K
+B
R14
1K
P3A
2
P100K X2
1 3
P3B
5
P100K X2
4 6
P2A
2
P100K X2
1 3
P2B
5
P100K X2
4 6
P1A
2
P100K X2
1 3
P1B
5
P100K X2
4 6
D2
R19
+V
18K
R18
R15
C7
1000 UF
22K
4.7K
D1
LDRR
signals to a mono output.
... anywhere you need to mix up to four line
- Live
- Studio
- Install
MX51s 4-Channel Mixer
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)
WARRANTY
For information on the Rolls One Year Limited Warranty, and
to register this product, visit our website at www.rolls.com
Rev:
A
1
1
Rolls Corporation
Salt Lake City, UT
05/2008
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