Rolls MA252 Connection Manual
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2
MA252
20 + 20 watt
Mixer/Amplifi er
Connection guide
Salt Lake City, Utah
09/11
• RCA Inputs, XLR Mic with Phantom Power
• Volume controls for each Channel
• Low noise, effi cient operation
• Small compact size
• Class D high effi ciency amp
The MA252 is a very compact 20 + 20 watt high effi ciency amp
with a four channel stereo mixer built in. Left and Right stereo
speaker outputs. The unit is perfect for small speakers in small
environments. Great for in ceiling and projector applications where
small size is needed along with class D low radiated heat loca-
tions.
WARNING:
WARNING:
THE MINIMUM SPEAKER IMPEDANCE IS 4
OHMS EACH.
IF YOU CONNECT AND USE THE MA252 WITH A LOW-
ER SPEAKER IMPEDANCE THAN LISTED ABOVE
YOU WILL DAMAGE THE UNIT AND POSSIBLY OTHER
EQUIPMENT THAT IS CONNECTED TO THE MA252.
CH 4
CH 1
CH 2
CH 3CH 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
CH 4
CH 1
CH 2
CH 3CH 4
LEVEL
LEVEL
LEVEL
LEVEL
LEFT
RIGHT
INPUT
+
+
SPEAKER OUTPUTS
PHANTOM
CH 1
INPUT
CH 2
INPUT
CH 3
INPUT
POWER
LINE
OUT
OFF - ON
CH 2
MONO
INPUT
MUTE
010
010
010
010
-
-
PS24
HI CLASS AMP
20 + 20 WATT MIX/AMP
MA252
MADE IN USA
www.rolls.com
SPECIFICATIONS:
Line Input Impedance: 10K Ohms Line
600 Ohms Mic.
Power Output: 20 Watts X 2 (4 Ohms)
Voltage Gain: 55 dB Mic
30 dB Line
Maximum Supply Voltage: 24 VDC
THD: .05% typical
EIN: 3 mV
Effi ciency: 85%
Input Sensitivity: 28 mV
Bandwidth: 20Hz - 25 kHz +/- 3dB
+Size: 6.75" x 3.5" x 1.5"
Weight: 1 lb.