Rolls RA280 User Manual

RA280

MPLIFIER

A

CORPORATION

BRIDGE NORMAL

MADE IN U.S.A.

SERIAL NUMBER

CAUTION

TO REDUCE THE RISK OF ELECTRIC

SHOCK DO NOT NOT REMOVE LID. NO

USER SERVICABLE PARTS INSIDE.

WARNING:

To reduce the risk of electric

REFER SERVICING TO QUALIFIED

SERVICE PERSONNEL

CHANNEL 2 INPUT CHANNEL 1 INPUT

RA280 Stereo Power
Amplifier

The RA280 is a stereo 80 WRMS/channel audio
power amplifier in a standard 19" 2U rack format.
It is intended for pro-audio and musical applica­tions, and is ideal for a studio monitor amplifier,
small PA systems, or as a midrange/treble driver in

shock or fire do not expose

this device to rain or moisture.

high power systems. The RA280 is a CD servo type
amplifier and is built solid with a painted steel
chassis, anodized aluminum front panel, a special
high performance toroid transformer, and fused
power lines. The MOSFET output stage is fault
protected and helps the RP280 forgive momentary
output shorts. CAUTION: As with all convection
cooled power amplifiers the heat sink (rear panel
fins) must have proper ventilation.

VOLUME 2

PWR

OWER

P

OSFET

M

1 4 28 80

WATTS 4 Ohms

1 4 28 80

WATTS 4 Ohms

FEATURES:

 MOSFET drivers in a voltage and current gain
circuit
 1 second turn-on delay
 LED power output meters
 Fault protected outputs

SPECIFICATIONS

Power Output, Stereo: 80 Watts RMS/ch. 4 Ω

50 Watts RMS/ch. 8 Ω
Bridged - 150 Watts RMS 8 Ω

Sensitivit y: <1 VRMS for full output
THD: <.08% (1kHz @ 1 Watt)
S/N Ratio: 106 dBU
Power Bandwidth: DC - 30 kHz +/- 1dB
Damping Factor: > 150
Slew Rate: 100 Volts/microSecond
Phase Shift: <10 Deg., 20Hz - 20kHz

Input Impedance: 10 KΩ Balanced

OUTPUT 1

-

+

OUTPUT 2

+

Power: 120 VAC 60Hz 2.5A

-

Size: 19 x 3.5 x 7.5

230 VAC 50Hz

(48 x 9 x 19 cm)

Weight: 12 lbs (5.5 kg)

VOLUME 1

OUTPUT 2 OUTPUT 1

4A 120V - 2A 230 V

same type and rating of fuse.

For continued prootection against

risk of fire, replace only with

WARNING

RISQUE DE CHOC - NE PAS ENLEVER

MAINS POWER

ROLLS Coporation

5143 South Main Street, Salt Lake City, UT, 84107

[phone] FAX [phone]

[e-mail] • www.rolls.com