PowerPre™ Specifications

The PowerPre has been optimized for sonic character while still delivering exceptional specifications. With 55dB of pure gain, yet measuring less than -122dBu of noise and greater than 97dB of dynamic handling, the PowerPre is more than capable of handling just about any microphone or source. During listening tests, the sound proves to be remarkably smooth yet astonishingly quiet. This is attributed to attention detail with respect to grounding and part placement along with use of the discrete electronics and the Hammond output transformer. The Vox control adds yet another dimension by introducing two carefully sculpted curves that will enhance and flatter most microphones.

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: +55dB
Maximum gain: +70dB when used with Workhorse*
Maximum output: +22dBu
Output impedance: 75Ω @ 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: 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  
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
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
Warranty: 3 years, transferable
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