SPECIFICATIONS Power Output, Stereo: Input Connectors: Output Connectors: Sensitivity: THD: S/N Ratio: Power Bandwidth: Damping Factor: Slew Rate: Phase Shift: Input Impedance: Power: Size: Weight: 100 Watts RMS/ch. 4 70 Watts RMS/ch. 8 Bridged - 200 Watts RMS or 70 Volt 8 1/4" TRS balanced and RCA 1/4" and 5-way binding posts <1 VRMS for full output <.08% (1kHz @ 1 Watt) 106 dBU 50 Hz - 25 kHz, +/- 1 dB > 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) RA2100b Power Amplifer 100 WATT STEREO - 200 WATT BRIDGED 70 VOLT 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. 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. This one-year warranty is in lieu of all expressed warranties, obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN LIMITED WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, WHATSOEVER. Some states do not allow the exclusion or limitation of special, incidental or consequential damages so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. VOLUME 1 VOLUME 2 0 10 1 5 30 100 0 10 1 5 30 100 PROTEC WATTS 4 Ohms WATTS 4 Ohms CT POWER RA2100b MOSFET POWER AMPLIFIER ROLLS CORPORATION SALT LAKE CITY, UTAH 7/00 OWNERS MANUAL INTRODUCTION Thank you for your purchase of the ROLLS RA2100b Power Amplifier. The RA2100b is a stereo 100W/channel RMS power amplifier in a standard 2 rack space format. It is intended for professional audio and distributed musical applications. The unit features 100 Watts per channel RMS into four ohms, 85 Watts per channel into eight ohms, and for the contractor - 70 Volts / eight ohms. 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 RA2100b will drive 25 Volt speaker lines directly from each channel, or 70 Volt lines bridged. INSPECTION 1. Unpack and inspect the RA2100b box and package. 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 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 . 9 5 4 0 1 N 4 1 4 18 N 4 1 4 8 R35 10K 1 2 C3 .0 1 R2 10K 3 C2 470P. R4 33K R3 1K 4 Vr- 8 R36 10K R23 22K Q4 M PSA06 J4A RCAX2 1 R38 10K R12 6 .8 K P2 500 R13 1K Q2 2N 3904 R14 150 R15 10K VrQ7 2N 3904 .2 Vr+ 6A VV+ R61 6A .3 Q 17 2N 3906 R62 470 .1 4 R16 47K D2 1N 4148 R25 330 R26 330 C6 .0 0 2 1 2 R27 100 Q 10 IR . 5 4 0 R34 3 4 H4A H4B HD4 H4C HD4 H4D HD4 HD4 R42 33K H?A HCN2 2 D9 LDRG 32 J4B RCAX2 2 Vr- R 104 1M H?A HCN2 H1E SW 2A DPDT 1 1 1M R 105 D25 1N 4148 1 3 R40 10K R41 100K 2N 3904 Q 14 D10 LDRR 3 R17 47K D3 1N 4148 R30 470 R28 2K Q8 M PSA56 R29 22K 100 3 OUTPUT 1 SERIAL NUMBER BRIDGE NORMAL R47 33K 5 C O R P O R A T IO N MADE IN U.S.A. J2 CHANNEL2 R43 10K R45 1K C7 .0 0 1 R44 10K C8 470P. R46 33K D26 1N 4148 R90 10K D24 LDRR 1458 2 3 U2A R51 10K C11 50P. Vr+ R52 10K V+ 51 R32 1K R33 10K Q9 2N 3906 H E A T S IN K D14 1N 4148 D15 1N 4148 D16 1N 4148 Q 25 R 100 4 .7 K D17 LDRY 1 R80 100K 2N 3904 R82 100K R69 330 R70 100 R75 Q 23 IR . 5 4 0 51 R83 10K 2N 3904 R84 100K 2N 3904 H E A T S IN K 1K R74 10K Q 22 2N 3906 D13 1N 4148 V+ R85 33K Q 28 D20 LDRR Q 27 D19 LDRG 32 Q 26 D18 LDRG 5 V+ Lo Cut Q 15 J113 R50 470 1 2 3 + CHANNEL 2 INPUT 8 1 CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT NOT REMOVE LID. NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL 1458 C9 .0 1 P101 P100K R48 1K 6 5 R49 100K R55 6 .8 K U2B 7 R54 10K R53 1K R31 .1 4 MAINS POWER WARNING For continued protection against risk of fire, replace only with same type and rating of fuse. + OUTPUT 2 Vr- WARNING: CHANNEL 1 INPUT To reduce the risk of electric shock or fire do not expose this device to rain or moisture. R87 47K R88 47K Vr+ NORMAL H1A H1B H?A HCN2 SW 2B DPDT 4 6 1N 4148 D11 R63 R65 R66 22K 1K R67 10K R68 Q 20 IR . 9 5 4 0 R79 10K R78 10K 2N 3904 1 2 H?A HCN2 C10 120P. 5 1 1 2K Q 18 M PSA06 RISQUE DE CHOC - NE PAS ENLEVER PROTECT R91 Q 29 2N 3904 R 101 t SET P2AND P102 B R ID G E 500 P102 .O R 1 -2 m V AC R O SS R 11 AN D R 111 R56 1K Q 16 2N 3904 R57 150 R58 10K R59 47K Q 19 2N 3904 C12 51 .0 0 2 R81 10K R64 330 BRIDGING To bridge the RA2100b, first ensure the power is off. Move the Bridging switch to the "Bridge" position. The Channel 1 Volume control will be the master volume, Channel two Volume is inactive. Connect the input to Channel 1 input, then connect the load (speakers) to the two positive (red) banana jacks. Make no connections to the black posts. 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. This mode is entered 1K R92 10K Vr- Q 30 2N 3904 R89 1K V+ R98 C13 6800U . R 94 22K C14 6800U . 1K R99 10K VrQ 31 2N 3904 D22 ZD 12V Q 32 -1 2 V Vr2N 3906 D23 Vr+ R60 47K R71 D12 1N 4148 R72 2K Q 21 M PSA56 T H E R M IS T O R R73 22K 100 4AMP .5 SW SW 1 SPST 4 T1 C P8010 2 C18 503 1 R93 3 .3 K V- J3 D21 RED R95 1K R96 10K C16 10U BR1 Q 24 2N 3904 LAST R72 C15 R76 470 ROLLS CORPORATION Title Size: 5143 South Main Street Salt Lake City, UT 84107 RA200 POWER AMP BOARD Document Number: Rev: B RA200.SCH Rb Sheet 1 of 1 PLUG AC M ALE C15 10U ZD 12V 12V 3 M A IN S T R A N S . O R M E R .4 V- 6 A R77 .1 Date: 28-Jun-1999