Rolls RA2100b Amplifier

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

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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Rolls RA2100B overview

  • 1Description

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
UPC: 675889210019
In the Box
Rolls RA2100b Stereo Power Amplifier - 70W per Channel into 8 Ohms with 25/70V Audio Distribution
  • External Power Adapter
  • One Year Warranty
  • Table of Contents
    • 1Description

    Rolls RA2100B specs

    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
    Packaging Info
    Package Weight 11.65 lb
    Box Dimensions (LxWxH) 22.126 x 9.055 x 5.669"

    Rolls RA2100B reviews

    RA2100b Amplifier is rated 4.3 out of 5 by 3.
    Rated 4 out of 5 by from Amp works great 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.
    Date published: 2014-05-13
    Rated 5 out of 5 by from Quality Product For boardroom applications wireless microphones it is a simple solution coupled with a small mixer Bruce D
    Date published: 2012-05-09
    Rated 4 out of 5 by from Easy to hook-up and easy to use! In courtroom to replace a 32 year old unit.
    Date published: 2010-12-20
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