Rolls MA252 Connection Manual

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.

SPECIFICATIONS:

Line Input Impedance:
Power Output:
Voltage Gain:
Maximum Supply Voltage:
THD:
EIN:
Effi ciency:
Input Sensitivity:
Bandwidth:
+Size:
Weight:
Salt Lake City, Utah
09/11
10K Ohms Line
600 Ohms Mic.
20 Watts X 2 (4 Ohms)
55 dB Mic
30 dB Line
24 VDC
.05% typical
3 mV
85%
28 mV
20Hz - 25 kHz +/- 3dB
6.75" x 3.5" x 1.5"
1 lb.
MA252
20 + 20 watt
Mixer/Amplifi er
MA252
MADE IN USA
www.rolls.com
HI CLASS AMP
CH 4
INPUT
20 + 20 WATT MIX/AMP
LEVEL LEVEL LEVEL
1 CH 2 CH 3 CH
INPUT
INPUT
2 CH 3 CH LINE
POWER
PHANTOM
OFF - ON L L
INPUT
1 CH
R R
OFF - ON
CH 1 CH 2 LINE
CH 3
PHANTOM
INPUT INPUT OUT
INPUT
POWER
• 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-

Connection guide

tions.
0 10 0 10 0 10 0
CH 4 CH 3 CH 2
LEVEL LEVEL LEVEL LEVEL
LEVEL STEREO
4 CH 3.5mm MIX/AMP T T A W 5 +
4 CH AMP CLASS
MA251
OUT INPUT
MONO
L 2 CH
USED BE MUST OUTPUTS BOTH
RIGHT LEFT
R MUTE
+ - - +
CH 2
MONO
SPEAKER OUTPUTS
INPUT
- -
+ +
MUTE
RIGHT LEFT
10
CH 1
5
PS12
PS24