REAR PANEL
SPEAKER OUTPUT: Push terminals for speaker wire.
PS12: For connection to the power supply.
INPUTS: RCA line level inputs.
MUTE JACK: By shorting out the RCA jack labeled MUTE, the Speaker Outputs
will be muted.
FRONT PANEL
CHANNEL VOLUME: Adjusts the level of signal from the Line Input to the Line
out RCA's and Speaker outputs.
3.5mm JACK: For connection to an ipod, MP3 player or computer TRS Stereo
(left, right and ground) connection to channel 4.
CONNECTION / OPERATION
To operate the MA254, properly connect cords from the sources to be mixed
(cassette decks, CD players, etc.) into the channel inputs. Connect the speaker
outputs to 4 Ohm or higher impedance speakers. Adjust the channel level con-
trols for the desired volume.
DESCRIPTION
NOTE: THIS MANUAL ASSUMES THE USER HAS A WORKING KNOWL-
EDGE OF AUDIO ELECTRONICS, BALANCED AND UNBALANCED CON-
NECTIONS, AND PROPER SIGNAL LEVEL SETTING.
INSPECTION / WARRANTY
1. Unpack and inspect the MA254 box and package.
If obvious physical damage is noticed, contact the carrier immediately to make a
damage claim. We suggest saving the shipping carton and packing materials for
safely transporting the unit in the future.
2. Please visit our web site at www.rolls.com and click on the Register Your War-
ranty Here button.
CH 4
CH 1
CH 2
CH 3
CH 4
LEVEL
LEVEL
LEVEL
LEVEL
MA254
INPUT
MADE IN USA
0
10
0
10
0
10
0
10
www.rolls.com
AMPMIX
5 + 5 WATT MIX/AMP
CH 4
CH 1
CH 2
CH 3
CH 4
LEVEL
LEVEL
LEVEL
LEVEL
PS12
CLASS AMP
5 + 5 WATT MIX/AMP
LEFT
RIGHT
MA251
3.5mm
STEREO
+
+
-
-
BOTH OUTPUTS MUST BE USED
PHANTOM
CH 1
INPUT
CH 2
INPUT
CH 3
INPUT
POWER
LINE
OUT
ON - OFF
CH 2
MONO
INPUT
MUTE
R
R
R
L
L
L
PS12
LEFT
RIGHT
+
+
SPEAKER OUTPUTS
LINE
OUT
CH 2
MONO
INPUT
MUTE
-
-
CH 1
INPUT
CH 2
INPUT
CH 3
INPUT
CH4
INPUT
INTRODUCTION
Thank you for your purchase of the MA254. The MA254 is a four channel mixer/
amplifi er designed for Audio and Visual applications. Channel 1-4 have RCA
stereo inputs and channel 4 has a 3.5mm stereo input. The MA254 is intended
for professional applications. It has a FR4(V94-0) rated glass epoxy circuit board,
and a powder coated steel chassis. All inputs are stereo. Outputs for Speaker
and Line are true stereo.
CHANNEL DESCRIPTION
CH 1 INPUT: Stereo RCA jack for connection to a signal source such as a CD
player, cassette deck, tuner, etc.
CH 2 INPUTS: Stereo RCA and one mono RCA for connection to a signal source
such as a CD player, cassette deck, tuner, etc.. PLEASE NOTE WITH A MONO
INPUT AS WELL AS A STEREO INPUT, CHANNEL 2 AT CERTAIN IMPED-
ANCES ON THE STEREO INPUT YOU MAY EXPERIENCE CROSS TALK BE-
TWEEN THE LEFT AND RIGHT. THIS IS NORMAL OPERATION AND SHOULD
BE EXPECTED.
CH 3 INPUT: Stereo RCA jack for connection to a signal source such as a CD
player, cassette deck, tuner, etc.
CH4 INPUT: Stereo RCA jack for connection to a signal source such as a CD
player, cassette deck, tuner, etc. CH4 also has a front connection for a stereo
3.5mm(1/8” jack).
LINE OUT: Stereo RCA jacks for connection to a mixer or amplifi cation device.
MU
T
E
+B
+B
+B
MO
N
O
I
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P
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LINE OUTS
VC
C
V+
CH 4
CH 3
CH2
IN 12-24 V
A
C
/V
DC
2
3
1
J1
J
APD
C
C3
1U
R9
100K
R6
4.
7K
C7
1U
R26
10K
R24
1K
R14
10K
R15
10K
R19
10K
R20
10K
R12
100K
R2
10K
C6
47U
D2
1N4001
R5
22K
C14
47U
C13
2200
R10
100
R8
18K
2
3
1
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6
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7
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AGN
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ROUT
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BSR
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AVC
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SPEAKER OUT
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1
Rolls Corporation
5968 S
350 W
Mu
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ta
h84107
1
M
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254.SCH
A
5 APRIL 2010
Title
S
ize:
D
ocum
ent Num
b
er:
Date:
Rev
:
S
heet
o
f
M
A
254 M
IXER AM
PLIFIER
Rb
VC
C
R25
220K
Q3
2N3904
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C16
1U
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1U
D3
1N4001
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1N4001
D4
1N4001
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2200
C11
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1
2
3
4
J6
PU
SH
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1K
R18
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R17
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J4
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R32
100K
R31
100K
CH 1
2
3
1
J5A
R
C
AX
4
PC
5
6
4
J5B
RCA
X
4
P
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J2B
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4
PC
2
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1
3
2
P4
A
P1
0
0
K X
2
4
6
5
P4
B
P1
0
0
K X
2
SCHEMATIC
