The Earthworks 521 ZDT 500-Series Microphone Preamp brings the exacting standards of the ZDT Zero Distortion Preamplifiers to the convenient 500 series format, providing a pristine amplification option to the 500 series rack.
The Earthworks 521 ZDT 500-Series Microphone Preamp is based on the ZDT Preamp technology designed by David Blackmer and features switchable phantom power, polarity invert, and peak amplitude clip detection, just as in the original 1021 Single Channel ZDT Preamp. The transformerless output stage of the Earthworks 521 will easily drive long cable runs without loss of quality. Transparent gain is switchable from 5dB to 60dB in 5dB steps.
The Earthworks microphone preamplifier topology provides outstanding common mode rejection, excellent overload margin and an incredibly low noise floor, combined with the ultra-wide bandwidth of the Earthworks 521 ZDT Preamps (1Hz to 200kHz ±0.5dB) and distortion of less than 1 part per million (0.0001%). This exceptional level of performance is maintained over an extensive range of impedances applied to the input, making the Earthworks 521 suitable for practically any microphone – ribbon, dynamic or condenser.
Earthworks 521 ZDT 500-Series Microphone Preamp Features
- Zero Distortion - less than one part per million (>0.0001%)
- High output level +30dBu
- Very Low Output Impedance will drive long lines without interference or signal loss
- True 48 volt phantom, polarity reverse & clip indicator
- Lowest Noise of any preamp on the market
- All Discrete Components; Class A Amplification (No ICs in the signal path)
- No Electrolytic Capacitors in the signal path
- Greater Transparency with minimum signal path and minimum features
- Full Differential (balanced) from Input to Output (i.e. no internal conversion to single-ended)
- Clean, pristine, uncolored sound
- Solid-state, transformerless
- Switchable 48V phantom power
- Polarity invert switch
- Peak amplitude clip detection
- Transparent gain switchable from 5dB to 60dB in 5dB steps
- Ultra-low noise floor
- Ultra-wide bandwidth
- Front panel TRS connector with adjustable output level
- Suitable for most ribbon, dynamic or condenser microphones
- Requires a 500 series rack
Earthworks 521 ZDT 500-Series Microphone Preamp Specifications
- Preamp Type: Solid State
- Number of Channels: 1
- Frequency Response: 2Hz to 100kHz ±0.1dB, 1Hz to 200kHz ±0.5dB
- Impulse Response: 1.4µs
- Distortion: main output; less than 1ppm (0.0001%); 1/4" out; 0.001%
- Input Noise: 1.6nVHz at 20dB gain; 0.6nV/Hz at 60dB gain
- EIN: -132dBV at 20dB gain; -143dBV at 60dB gain
- Slew Rate: 22V/µs
- Output DC Offset: ±1 mV Typical, Servo Balanced
- Input / Output Connector: 500 Series EDAC Edge Connector
- Input Impedance: 10KO phantom on, 100KO phantom off
- Front Panel Balanced Out: ¼" TRS Fem. balanced transformerless (variable)
- Dimensions: 1 500 Series Rack Space 1.5" x 5.25" x 6"
- Weight: 0.8 lb. (0.36kg)
Earthworks 521 ZDT 500-Series Microphone Preamp Includes
- Earthworks 521 ZDT 500-Series Microphone Preamp
- User Manual
- 2 Year Warranty
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