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HomepageMic Preamps500 Series Preamps › Radial Engineering PowerPre 500
Radial Engineering PowerPre 500

The Radial PowerPre is a 500 series 100% discrete mic preamp with Accustate input control for low noise and transformer coupled output for added warmth.

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.

The design begins with a front mounted XLR for instant connectivity plus a recessed 48V phantom power switch for safety. Unlike most mic preamps that require careful gain adjustment to avoid troublesome noise, the PowerPre is equipped with the newly developed AccuState™ input stage that automatically optimizes signal-to-noise at all levels with up to 55dB of gain. This is supported with a full 10 segment LED meter for precise signal monitoring.

To add extra character; a 3-position Vox control lets you set the PowerPre to 'breath' for added high frequency air such as when accentuating a vocal track or adding harmonic content to an acoustic guitar. The 'punch' setting adds body when recording electric guitar or can be used to fatten a voice. When set to linear, the PowerPre delivers a truly natural rendering for orchestral recording that will suit the most demanding purist. This is augmented with a gentle high-pass filter that helps control low end resonance when layering acoustic instruments.

Ultra quiet, low noise and exceptionally warm sounding... the PowerPre makes spectacular audio easy.
  • 100% discrete class-A instrument and mic preamp
  • Feed forward front-end, void of negative feedback
  • AccuState gain control for low noise at all levels
  • Variable low frequency cut for acoustic instruments
  • Specifications
    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 : 2.2k (1.5k with pad)
  • Mic preamp gain : +55dB
  • Maximum gain : +70dB when used with Workhorse*
  • Maximum output : +22dBu
  • Output impedance : 75O @ 1kHz
  • Output type : Transformer isolated
  • Common mode rejection (CMRR) : >75dB
  • Equivalent Input Noise (EIN) : -122dBu @ maximum gain
  • Dynamic range : >97dB
  • 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 : 150k, 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
  • Meter : 10 segment peak indicator with hold
  • Pad : -15dB
  • Polarity : 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

  • Mechanical
  • Weight : 1.5lbs (0.7Kg)
  • Shipping size : 9 x 6.5 x 2 (inches)
  • Compliance (API) : Yes
  • Compliance (WHOS-Doc) : Yes
  • Conditions : For use in dry locations only between 5°C and 40°C
  • Reviews
    Free shipping in Canada. Conditions
    Additional information
    For more information about the PowerPre 500, please visit the website of Radial Engineering
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