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Rolls RA2100b Stereo Power Amplifier - 70W per Channel into 8 Ohms with 25/70V Audio Distribution

B&H # RORA2100B Mfr # RA2100B
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The RA2100b is a stereo power amplifier, utilizing MOSFET drivers in a voltage and current gain circuit. It is intended for professional audio applications such as recording studios and small live venues.

The RA2100b is designed to drive 4 or 8 ohm speakers, but will also distribute audio to 25V speakers (individual channels) or 70V speakers (in bridged mode.) It features a bridging switch, one-second power-up delay and LED power-output meters. The unit includes a special high performance transformer, and a fused power line. The MOSFET output stage is fault protected which allows the amplifier to forgive momentary output shorts and has over-temperature protection. The amplifier is convection cooled, hence no fan noise.

Stereo power amplifier
Each channel offers both 4 and 8 ohm, or 25V (both channels) and 70V (bridged) operation
MOFSET drivers in a voltage and current gain circuit
Four LED power-output meters per channel
Fault protected outputs
Power Rating Stereo @ 4 ohms: 100 watts RMS per channel
Stereo @ 8 ohms: 70 watts RMS per channel
Bridged @ 8 ohms: 200 watts
Bridged @ 70V: 200 watts
Damping Factor >150
Input Sensitivity <1 VRMS for full output
Input Impedance 10k ohms balanced
Gain Not specified by manufacturer
Frequency Response 50Hz to 25kHz +/-1dB
Signal-to-Noise Ratio >106dBu
Total Harmonic Distortion (THD) <0.08%, 1kH @ 1 watt
Input Connections 2 x 1/4" TRS phono, 2 x RCA coaxial
Output Connectors 2 x Pair 5-way binding posts, 2 x 1/4" TS phono
Controls Front Panel 2 x Rotary level control
Power switch
Controls (Rear) 1 x Stereo/Mono Bridge switch
Indicators 1 x 4 LED level metering per channel
1 x Protect, 1 x Power LED
Cooling Convection
Power Consumption Not specified by manufacturer
Dimensions 19" x 7 1/2" x 3 1/2"
Weight 12 lbs
Specialties One second turn-on delay
Rolls RA2100b Stereo Power Amplifier - 70W per Channel into 8 Ohms with 25/70V Audio Distribution
  • External Power Adapter
  • One Year Warranty
  • REVIEW SNAPSHOT®

    by PowerReviews
    RollsRA2100b Amplifier
     
    4.3

    (based on 3 reviews)

    Ratings Distribution

    • 5 Stars

       

      (1)

    • 4 Stars

       

      (2)

    • 3 Stars

       

      (0)

    • 2 Stars

       

      (0)

    • 1 Stars

       

      (0)

    100%

    of respondents would recommend this to a friend.

    Pros

    • Easy to use (3)

    Cons

      Best Uses

        Reviewed by 3 customers

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        Displaying reviews 1-3

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        4.0

        Amp works great

        By sound and lighting guru

        from Lexington, MA

        About Me Experienced

        Verified Buyer

        Pros

        • Easy To Use
        • Excellent Sound

        Cons

          Best Uses

            Comments about Rolls RA2100b Amplifier:

            I bought this amp to use in a PA system for a corporate office. So far, all works as hoped; no issues I am very satisfied with the unit.

            Share this review

             
            5.0

            Quality Product

            By Bruce

            from Ottawa Canada

            About Me Experienced

            Verified Buyer

            Pros

            • Easy To Use
            • Simple Power

            Cons

              Best Uses

              • Boardroom

              Comments about Rolls RA2100b Amplifier:

              For boardroom applications wireless microphones it is a simple solution coupled with a small mixer

              Bruce D

              Share this review

               
              4.0

              Easy to hook-up and easy to use!

              By Allen

              from Jasper, GA

              About Me Novice

              Verified Buyer

              Pros

              • Easy To Use
              • Excellent Sound
              • Powerful

              Cons

                Best Uses

                • Performances

                Comments about Rolls RA2100b Amplifier:

                In courtroom to replace a 32 year old unit.

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