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.Features

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

SpecificationsMicrophone 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