Rolls RA900 User manual
R A900 Power Amplifier
The R A900 Power Amplifier is a two channel amp with
two 410 watt RMS - 4 ohm outputs via 1/4" jacks or 5-
way binding posts. It may be bridged and connected to a
4 or 8 ohm load supplying up to 1100 Watts or 850 Watts
respectively. The unit is housed in a painted steel chas-
sis and includes a special high performance transformer,
and a fused power line.
The R A900 is ideal for DJs, musicians, or other sound
reinforcement applications like powering front-of-house
speakers or monitors.
SPECIFICATIONS
Power Output, Stereo: 570 W RMS/ch. 2Ω
410 W RMS/ch. 4 Ω
260 W RMS/ch. 8 Ω
Bridged: 1100 Watts RMS 4 Ω
850 Watts RMS 8 Ω
Input Connectors: 1/4" TRS balanced and XLR balanced
Output Connectors: 1/4" and 5-way binding posts
Sensitivit y: 0.9 V rms 0 dB V
THD: <.05% (20Hz - 20 kHz)
@ rated output, 8 Ω)
Frequency response: @ 1 Watt rms 8 Ω; 10Hz to 40kHz
@ rated output, 8 Ω; 20Hz to 20kHz
Hum and Noise: 100 dB, unweighted
Power Consumption: 7A and 120 VAC
Cooling System: 2 speed fan
Transformer: Toroidal
Size: 19" x 3.5" x 15.9"
(48.3 x 8.8 x 40.5 cm)
Weight: 31 lbs (14 kg)
ROLLS Coporation
5143 South Main Street, Salt Lake City, UT, 84107
(801) 263-9053 FAX (801) 263-9068
CHANNEL A
0 10
RA900
CHANNEL B
0 10
PROTECT
CLIP
SIGNAL
POWER
POWER
INPUT
BAL
BA
Channel B Channel A
INPUT
THRU
BA
CAUTION
MINIMUM LOAD IMPEDANCE
2 OHMS PER CHANNEL
4 OHM BRIDGE
FUSE
15A/120V
- BRIDGE MONO +
POWER AMPLIFIER
+
-
+
2-
3
1234
BA
14
23
LOW
CUT FILTER
ON=30Hz
OFF=50Hz
LOW
CUT FILTER
ON=30Hz
OFF=50Hz
1
GROUND
LIFT
AMP MODE
STEREO BRIDGE
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