User manual ROLLS RA280

[. . . ] SPECIFICATIONS Power Output, Stereo: Bridged Sensitivity: THD, IMD: S/N Ratio: Power Bandwidth: Damping Factor: Slew Rate: Phase Shift: Input Impedance: Power: Size: Weight: 80 Watts RMS/ch. 8 150 Watts RMS 8 <1 VRMS for full output <. 08% (1kHz @ 1 Watt). 05% 106 dBU 50 Hz - 25 kHz +/- 1dB > 150 100 Volts/microSecond <10 Deg. , 20Hz - 20kHz 10 K Balanced 120 VAC 60Hz 2. 5A 230 VAC 50Hz 19" x 3. 5" x 7. 5" (48 x 9 x 19 cm) 12 lbs (5. 5 kg) RA280 Power Amplifier 80 Watt Stereo 150 Watt Bridged LIMITED WARRANTY This product is warranted to the original consumer purchaser to be free from defects in materials and workmanship under normal installation, use and service for a period of one (1) year from the date of purchase as shown on the purchaser's receipt. The obligation of Rolls Corporation under this warranty shall be limited to repair or replacement (at our option), during the warranty period of any part which proves defective in material or workmanship under normal installation, use and service, provided the product is returned to Rolls Corporation, TRANSPORTATION CHARGES PREPAID. [. . . ] This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. VOLUME 1 VOLUME 2 PWR 1 4 28 80 1 4 28 80 WATTS 4 Ohms WATTS 4 Ohms RA280 MOSFET POWER AMPLIFIER Rolls Corporation Salt Lake City, UT 12/98 OWNERS MANUAL 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 one-second input turn on delay, and LED power output meters. The RA280 is built solid and has a painted steel chassis, special highperformance transformers and a fused power line. The MOSFET output stage is fault protected and helps the RA280 forgive output shorts. 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. 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. [. . . ] 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. The level meters will both light, and the output power into 8 ohms is the sum of the LEDs that light. [. . . ]