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  • RA-PowerPre-500

    Radial Engineering PowerPre 500 Series Mic Preamp Module

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    The Radial PowerPre™ is a high performance microphone preamplifier designed to be used with the Radial Workhorse and other 500 series modular racks. It features 100% discrete components for optimal signal transfer and employs a 'vintage' Hammond broadcast output transformer for warmth and exceptionally smooth tone.

      • Radial PowerPre 500 PRODUCT FEATURES:

        • Hand selected 100% discrete electronics
        • Hammond broadcast transformer output
        • AccuState™ low-noise input circuit
        • 3-position Vox control for added air or punch
      • Radial PowerPre 500 TECHNICAL SPECIFICATIONS:




        Specifications are subject to change without notice.
        *Refers to use with Radial Workhorse rack and mixer

        Microphone Input


        Circuit type:

        100% discrete, transformer coupled output

        Microphone Input:

        Accustate input fully variable gain control

        Current draw:

        130mA (maximum draw)

        Frequency response:

        20Hz ~ 20KHz +0/-1dB

        Input Impedance:

        2.2kΩ (1.5kΩ with pad)

        Mic preamp gain:


        Maximum gain:

        +70dB when used with Workhorse*

        Maximum output:


        Output impedance:

        75O @ 1kHz

        Output type:

        Transformer isolated

        Common mode rejection (CMRR):


        Equivalent Input Noise (EIN):

        -122dBu @ maximum gain

        Dynamic range:


        Total Harmonic Distortion (THD+N):

        0.03% @ mid gain with +10dBu output

        Intermodulation distortion (IMD):

        0.012% @ 50dB gain with +10dBu output

        Instrument Input


        Omniport input Impedance:

        150kΩ, unbalanced*

        Instrument preamp gain:

        +55dB, unbalanced*

        Equivalent Input Noise (EIN):

        -95dBu, unbalanced*

        Total Harmonic Distortion (THD+N):

        0.05% @ mid gain with +10dB output

        Control Panel



        10 segment peak indicator with hold




        Inverts pins 2 and 3 at XLR input*

        High-pass filter:

        150Hz cut off, -3dB @ 100Hz

        Vox Control:

        3 position preset EQ

        Phantom power:

        48VDC - 10mA (as supplied by 500 frame)

        XLR configuration:

        AES spec: pin-1 ground, pin-2 (+), pin-3 (-)

        Ground lift (rear panel):

        Lifts ground on front panel XLR input only




        1.5lbs (0.7Kg)

        Shipping size:

        9 x 6.5 x 2 (inches)

        Compliance (API):


        Compliance (WHOS-Doc):



        For use in dry locations only between 5°C and 40°C


        3 years, transferable

    Need more info on the Radial PowerPre 500? Click HERE for the Radial website >>>