INTRODUCTION
Thank you for your purchase of the ROLLS RA250 50 Watt per channel Power Amplifi er.
The RA250 is a virtually indestructible single rack space amplifi er intended for installa-
tions, musicians and studio applications. The unit is ideal for home studio applications
or wherever a clean, effi
cient, medium wattage amp is required. Please read the follow-
ing manual carefully to achieve the best results from this product.
DESCRIPTION
FRONT PANEL
RA250
Digital Stereo Power Amplifier
50 + 50 watt
VOLUME: This control adjusts the output level.
PWR: LED indicating the unit’s power status.
REAR PANEL
LEFT
RIGHT
INPUT
RISQUE DE CHOC - NE PAS ENLEVER
WARNING:
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER.
NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
-
+
-
+
RIGHT
LEFT
120-240 V
AC 50/60Hz 100V
A
1.5A
Fuse
USE ONL
Y
WITH A 250V FUSE
100-240 VAC 50/60 Hz 15 VA: IEC Power Cord. Connect to a properly grounded AC
source. NOTE: REPLACE THE FUSE WITH ONLY THE PROPER RATED FUSE. INSTALLING A
FUSE OTHER THAN THE RECOMMENDED RATING WILL DAMAGE THE UNIT.
Outputs: Spring loaded terminals to be connected to 4 or 8 Ohms speaker loads only.
INPUT: RCA jacks to be connected to line level signals to be amplifi ed. Note: Do not
directly connect the output of a phono player as those devices require special equal-
ization.
For MONO operation, plug one RCA connector between both RCA jacks.
INSTALLATION
Mount the RA250 in a safe and sturdy rack. Connect the output of the signal source to
the RA250, and connect the Outputs to your speakers.
Plug the AC cord into a properly grounded AC outlet.
Send signal to the RA250 and adjust the LEVEL for a comfortable listening level.
SPECIFICATIONS
Class D amplifi er
Main Input Voltage: 100-240 VAC 50/60 Hz
Recommended Load:
4-8 Ohms minimum
Frequency Response:
20 Hz to 20 kHz
Equiv. Input Noise:
100 microVolt typical, A weighted
600
Ohm
input
S/N Ratio:
90 dB @ 50 Watts
Gain:
25
dB
Input Impedance:
10 k Ohms
Effi
ciency 85%
Size (W x H x D):
19” x 1.75” x 5” (48 x 4.5 x 12.7)
Weight:
5.5
lbs
(2.5
kg)
