Rolls RA170 70 Volt Mono Installation Power Amplifier


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Dale #:ROLL-RA170

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  • The RA170 mono power amplifier was designed especially for the installation contractor, and is housed in a single rack-space unit with a choice of either an RCA coaxial or 1/4 TS phono unbalanced input. The 70 volt speaker outputs are provided via spring-loaded terminals and no transformer is required for speaker connection.

    The front panel includes a power indicator LED, a volume control, and two clip LED's which indicate circuitry overload. The output circuitry of the RA170 is protected from momentary shorting and excessive load by a specially designed protective circuit.


    • Mono 70 volt amplifier
    • Drives 70 volt speakers directly
    • Choice of RCA coaxial or 1/4 TS phono input
    • Spring loaded speaker output
    • Clip indication
    • Fault protection output
  • Power RatingMono @ 70V: 70 watts maximum
    Damping FactorNot applicable
    Input SensitivityNot specified by manufacturer
    Input Impedance147k ohm
    Frequency Response70Hz to 20kHz
    Signal-to-Noise RatioBetter than 114dB @ 70 watts
    Total Harmonic Distortion (THD)Not specified by manufacturer
    Input Connections1 x RCA coaxial, 1 x 1/4 TS phono
    Output Connectors1 x Pair spring loaded speaker connectors
    Controls Front PanelPower switch, 1 x Rotary volume
    Controls (Rear)None
    Indicators2 x Clip, 1 x Power LED's
    CoolingConvection (uses front panel for heat distribution)
    Power ConsumptionNot specified by manufacturer
    Dimensions19 x 5 x 1 3/4
    Weight5.5 lbs
    SpecialtiesRequires no transformer coupling to drive 70 volt speakers directly
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