Rolls MA251 Specifications

MSRP: $150.00 USD
5 + 5 WATT MIXER - AMPLIFIER
MADE IN USA
www.rolls.com
CLASS AMP
5 + 5 WATT MIX/AMP
LEVEL
1 CH
POWER
PHANTOM
OFF - ON
OFF - ON
PHANTOM
POWER
The new MA251 is a compact class D
stereo amplifier with a 4 CH. stereo mixer
built in. It has 5 watts per channel @ 4
Ohms. The class D low heat design gives
the MA251 the ability to be mounted in
very tight applications. It will work great in
ceilings by projectors, or anywhere small
and heat free amplification is required. The
MA251 is in an all metal chassis and
weighs 1 pound. Overall dimension are
6.75" X 3.5" X 1.5". Bottom mounts are
provided for permanent installations. The
MA251 has an included 12 VAC external
power supply. The 4 channel mixer section
consists of 2 separate RCA stereo inputs,
along with an XLR mic input and a 3.5mm
(1/8") stereo input perfect for an ipod or
laptop computer type input. Phantom
power is supplied to the XLR input by a
switch on the back of the MA251.

SPECIFICATIONS

Line Input Impedance: 10K Ohms line
600 Ohms mic
Power Output: 5 watts X 2 @ 4 Ohms.
Voltage Gain: 55 dB mic
30 dB line
Maximum Supply Voltage: 24 VDC
THD: .05% typical
Effi ciency: 85%
Bandwidth: 20Hz - 25 kHz
Size: 6.75" x 3.5" x 1.5"
Weight: 1 lb.
MA251
MA251
CH 4
INPUT
LEVEL LEVEL
2 CH
INPUT INPUT
2 CH 3 CH
L
L
INPUT
1 CH
R
R
CH 1 CH 2
CH 3
INPUT
INPUT INPUT
ROLLS ROLLS
MIXER - AMP MIXER - AMP
5 + 5 Watts 5 + 5 Watts
INSTALLATION MIX - AMPLIFIER
STEREO INPUTS AND OUTPUTS
ROLLS
5968 SOUTH 350 WEST S.L.C.,UT 84107
PHONE: 801-263-9053
FAX: 801-236-9068
DATA SHEET FOR MA251
0 10 0
CH 4 CH 3
LEVEL LEVEL
LEVEL STEREO
3 CH 4 CH
3.5mm
4
OUT INPUT
LINE MONO
L 2 CH
USED
RIGHT
R MUTE
+
CH 2
MONO
INPUT
+
LINE MUTE
RIGHT
OUT
www.rolls.com
10 0 10 0
CH 2 CH 1
LEVEL LEVEL
MIX/AMP WATT 5 +
CH
AMP CLASS
MA251
BE MUST OUTPUTS BOTH
LEFT
- -
+
SPEAKER OUTPUTS
-
-
+
LEFT
Size: 6.75" X 3.5" X 1.5"
PS12
- -
+
+
LEFT RIGHT
BOTH OUTPUTS MUST BE USED
MA251
CLASS AMP
CH 4
5 + 5 WATT MIX/AMP
3.5mm
STEREO
MADE IN USA
10
5
PS12
PS12
R
R R
MUTE
CH 1
INPUT
L L L
CH 2
ON - OFF
PHANTOM
MONO LINE CH 3 CH 2
POWER
INPUT OUT INPUT INPUT
CH 4 CH 3 CH 1
CH 2
LEVEL LEVEL LEVEL
LEVEL
Included - 12
VAC ROLLS
PS12 external
power supply
75889 02510
6 1