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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
Rolls RA2100b Amplifier

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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
UPC: 675889210019
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 Stereo Power Amplifier - 70W per Channel into 8 Ohms with 25/70V Audio Distribution
  • External Power Adapter
  • One Year Warranty
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