User manual ROLLS RA2100

[. . . ] Products returned to us or to an authorized Service Center must be accompanied by a copy of the purchase receipt. In the absence of such purchase receipt, the warranty period shall be one (1) year from the date of manufacture. This warranty shall be invalid if the product is damaged as a result of defacement, misuse, abuse, neglect, accident, destruction or alteration of the serial number, improper electrical voltages or currents, repair, alteration or maintenance by any person or party other than our own service facility or an authorized Service Center, or any use violative of instructions furnished by us. [. . . ] The RA2100b will drive 25 Volt speaker lines directly from each channel, or 70 Volt lines bridged. 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 RA2100b via the RCA or 1/4" input jacks. Speakers may be connected by using the 1/4" output jacks, or the dual banana posts. Turn the Volume controls fully counterclockwise (off), and turn on the power switch, the power LED should light. With the program material running, slowly increase the Volume controls until the desired level of sound is present. There is a one second turn-on delay provided to prevent possible speaker damage in case all equipment is on a signal power strip. 4A 120V - 2A 230 V OUTPUT 2 OUTPUT 1 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. Since the RA2100b is convection cooled, the unit radiates heat from the rear panel and , depending on the load demand, it may become very hot if drawn upon heavily. DRIVING 25 OR 70 VOLT LINES The RA2100b will drive 25 or 70 Volt lines directly with no added transformers when used the following way: · Each channel will drive 25 volt lines directly. · A single 70 volt line may be driven when the RA2100b is in Bridged mode. In order to drive two 70 volt lines, two 8 ohms to 70 Volt conversion transformers will be needed. SCHEMATIC CHANNEL1 R1 10K C1 . 0 0 1 R5 33K Lo Cut 1458 2 3 U1A 1 R8 470 P1 P100K R6 1K C4 120P. R 103 1M H1D 6 5 Q1 Vr+ C17 1U J113 R7 100K U1B Vr+ R9 10K C5 Vr+ 50P. 1458 7 R11 10K R10 1K V+ D4 D5 D6 1N 4148 V+ R 102 Q 1 1 4 . 7 K 2N 3904 D7 LDRY 1 R37 100K Q 12 2N 3904 D8 LDRG 5 R39 100K 2N 3904 Q 13 J1 . 1 6A Q3 2N 3906 R18 . 1 R19 470 D1 1N 4148 R22 2K R20 1K R21 10K Q5 2N 3904 R24 51 Q6 IR . [. . . ] Connect the input to Channel 1 input, then connect the load (speakers) 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. FAULT PROTECTION The fault protection in the RA2100b limits the current to the output stage in the faulted channel and turns on all the LEDs in that channel. [. . . ]