Thank you for your purchase of the Rolls RA280 Power Amplifier. The RA280 is a stereo 80 Watt/channel RMS power amplifier in a standard 2 rack space format. It is intended for professional audio, musical, and studio applications. The unit features 80W per channel RMS into four ohms, 50W per channel RMS into eight ohms, and 150 watts into eight ohms bridged.
The unit also features MOSFET drivers in a voltage and current gain circuit, a
INSPECTION
1. Unpack and Inspect the RA280 package
Your RA280 was carefully packed at the factory in a protective carton. Nonetheless, be sure to examine the unit and the carton for any signs of damage that may have occurred during shipping. If obvious physical damage is noticed, contact the carrier immediately to make a damage claim. We suggest saving the shipping carton and packing materials for safely transporting the unit in the future.
2.Please complete the Warranty Registration Card and return it to the factory.
INSTALLATION
Connect the power cord to an AC power source, connect the input to the signal source and to the RA280 via the RCA or 1/4" input jacks . Speakers may be connected by using 1/4" jacks, or the dual banana posts which are preferred. When using in bridged mode, the banana connectors must be used.
Turn the Volume controls fully counterclockwise (off), and turn on the power switch, the power LED should light. With the program material running, slowing increase the Volume controls until the desired level of sound is present.
We've included the one second
4A 120V - 2A 230 V |
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OUTPUT 2 | OUTPUT 1 | SERIAL NUMBER |
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| OUTPUT 1 | MADE IN U.S.A. |
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| CAUTION |
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| TO REDUCE THE RISK OF ELECTRIC |
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| SHOCK DO NOT NOT REMOVE LID. NO |
MAINS POWER | + |
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| CHANNEL 2 INPUT | CHANNEL 1 INPUT | USER SERVICABLE PARTS INSIDE. | |||
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| SERVICE PERSONNEL | |
For continued prootection against |
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risk of fire, replace only with |
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same type and rating of fuse. |
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| WARNING: |
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| To reduce the risk of electric |
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| shock or fire do not expose | |
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| this device to rain or moisture. |
RISQUE DE CHOC - NE PAS ENLEVER
BRIDGING
To bridge the RA280, move the Bridging switch to the "Bridge" position. The Channel 1 knob controls the level of the bridged output, Channel 2 knob is inactive.
Connect the input to Channel 1 input, then connect the load to the two positive (red) banana jacks. Make no connections to the black banana jacks. The level meters will both light, and the output power into 8 ohms is the sum of the LEDs that light.
FAULT PROTECTION
The fault protection in the RA280 limits the current to the output stage in the faulted channel and turns on all the LEDs in that channel. This mode is entered whenever the output stage is called upon for too much power, it may also be fooled by impedances lower than four ohms which may cause the output stage to overheat and burn up the MOSFETs.
IMPORTANT: Since the RA280 is convection cooled, the unit radiates heat from the rear and, depending on it's load demand, it may become very hot if drawn upon heavily.
Should the unit need service, contact Rolls directly, obtain a Return Authoriza- tion number (RA Number), and return the unit to us for repair.
