ROLLS CORPORATION SALT LAKE CITY, UTAH · RA2100b is a stereo 100W/channel RMS power amplifier in a...

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RA2100b Power Amplifer 100 WATT STEREO - 200 WATT BRIDGED SPECIFICATIONS Power Output, Stereo: 100 Watts RMS/ch. 4 70 Watts RMS/ch. 8 Bridged - 200 Watts RMS or 70 Volt 8 Input Connectors: 1/4" TRS balanced and RCA Output Connectors: 5-way binding posts t u p t u o l l u f r o f S M R V 1 < : y t i v i t i s n e S ) t t a W 1 @ z H k 1 ( % 8 0 . < : D H T U B d 6 0 1 : o i t a R N / S Power Bandwidth: 50 Hz - 25 kHz, +/- 1 dB Damping Factor: > 150 d n o c e S o r c i m / s t l o V 0 0 1 : e t a R w e l S z H k 0 2 - z H 0 2 , . g e D 0 1 < : t f i h S e s a h P Input Impedance: 10 KBalanced A 5 . 2 z H 0 6 C A V 0 2 1 : r e w o P 230 VAC 50Hz 5 . 7 x 5 . 3 x 9 1 : e z i S (48 x 9 x 19 cm) ) g k 5 . 5 ( s b l 2 1 : t h g i e W Quick Start Guide ROLLS CORPORATION SALT LAKE CITY, UTAH 09/10 CHANNEL 1 CHANNEL 2 Mosfet Power Amplifier RA2100b 200 Watt / 70 Volt

Transcript of ROLLS CORPORATION SALT LAKE CITY, UTAH · RA2100b is a stereo 100W/channel RMS power amplifier in a...

RA2100b Power Amplifer100 WATT STEREO - 200 WATT BRIDGED

SPECIFICATIONSPower Output, Stereo: 100 Watts RMS/ch. 4 Ω

70 Watts RMS/ch. 8 ΩBridged - 200 Watts RMS or 70 Volt 8 Ω

Input Connectors: 1/4" TRS balanced and RCAOutput Connectors: 5-way binding posts

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UBd 601:oitaR N/SPower Bandwidth: 50 Hz - 25 kHz, +/- 1 dBDamping Factor: > 150

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Quick Start Guide

ROLLS CORPORATIONSALT LAKE CITY, UTAH

09/10

CHANNEL 1 CHANNEL 2

Mosfet PowerAmplifier

RA2100b200 Watt / 70 Volt

INTRODUCTION

Thank you for your purchase of the ROLLS RA2100b Power Amplifier. TheRA2100b is a stereo 100W/channel RMS power amplifier in a standard 2 rackspace format. It is intended for professional audio and distributed musical applica-tions. The unit features 100 Watts per channel RMS into four ohms, 85 Watts perchannel into eight ohms, and for the contractor - 70 Volts / eight ohms.The unit also features MOSFET drivers in a voltage and current gain circuit, aone-second input turn-on delay, and LED power output meters. The RA2100b willdrive 25 Volt speaker lines directly from each channel, or 70 Volt lines bridged.

INSPECTION1. Unpack and inspect the RA2100b box and package.If obvious physical damage is noticed, contact the carrier immediately to make adamage claim. We suggest saving the shipping carton and packing materials forsafely transporting the unit in the future.

2. Please complete the Warranty Registration at www.rolls.com.

INSTALLATIONConnect the power cord to an AC power source, connect the input to the signalsource and to the RA2100b via the RCA or 1/4” input jacks. Speakers may beconnected by using the dual banana posts. Turn theVolume controls fully counterclockwise (off), and turn on the power switch, thepower LED should light. With the program material running, slowly increase theVolume controls until the desired level of sound is present. There is a one secondturn-on delay provided to prevent possible speaker damage in case all equipmentis on a signal power strip.

BRIDGINGTo bridge the RA2100b, first ensure the power is off. Switch the Bridging switch tothe “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 twopositive (red) banana jacks (CH1 + is + and CH2 + is now -). Make no connections to the black posts.

FAULT PROTECTIONThe fault protection in the RA2100b limits the current to the output stage in thefaulted channel and turns on the CLIP LED for that channel. This mode is entered

whenever the output stage is called upon for too much power, it may also befooled by impedances lower than four ohms - which may cause the output stageto overheat and burn up the MOSFETs.Since the RA2100b is convection cooled, the unit radiates heat from the rearpanel and , depending on the load demand, it may become very hot if drawn uponheavily.

DRIVING 25 OR 70 VOLT LINESThe RA2100b will drive 25 or 70 Volt lines directly with no added transformerswhen 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. Inorder to drive two 70 volt lines, two 8 ohms to 70 Volt conversion transformers willbe needed.

SCHEMATIC

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ROLLS CORPORATION5143 South Main StreetSalt Lake City, UT 84107

128-Jun-1999

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