Earthworks 521 ZDT 500 Series Microphone Preamp
Earthworks 521 ZDT 500 Series Microphone Preamp

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LIST: $1,249.00
PRICE: $999.00

Availability: Usually Ships in 3 to 5 Days


Earthworks 521 ZDT Zero Distortion Preamplifier - 500-Series Mic Preamp

The exacting standards of the Earthworks Zero Distortion Technology preamplifiers in the convenient 500 series format.

The Earthworks 521 ZDT brings the Earthworks ZDT Zero Distortion Preamplifiers™ technology, designed by David Blackmer, to the convenient 500 series format, giving you an extremely clean, uncolored mic pre.

The solid state 521 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 521 ZDT easily drive long cable runs without loss of quality, making it ideal for long cable runs. 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 ZDT Preamps and distortion of less than 1 part per million. This exceptional level of performance is maintained over an extensive range of impedances applied to the input making the 521 suitable for practically any microphone – ribbon, dynamic or condenser.

Earthworks 521 ZDT Zero Distortion Preamplifier key features:

  • Clean, uncolored 500 series preamp
  • 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
  • Suitable for most ribbon, dynamic or condenser microphones

Don’t forget to check out RSPE’s Rack Revolution, a virtual 500-series rack builder that lets you custom-configure the perfect 500-series lunchbox for your studio, DAW, or mobile recording rig. RSPE carries every 500-series module imaginable, including mic preamps, compressor-limiters, equalizers, and 500 power racks.

Who's using Earthworks:

“It’s the purest piano mic pickup that I’ve ever heard. Like does not describe how good I feel about the PM40 PianoMic System.”
- Stevie Wonder

“There have always been a number of ways to mic a piano with the lid closed, but prior to the PM40, I never felt any of them sounded particularly good. Regardless of whether I close the lid or leave it open, the Earthworks PM40 has a special quality that is heads above anything else I’ve ever used."
- John Harris, Music Mixer for the Grammy Awards

“Earthworks microphones have delivered to me a consistent and reliable natural tone of each vocalist using it. I am extremely proud of my vocal mixes. Earthworks microphones have delivered the goods. Natural tone with nothing missing.”
- Brian J. Simon, FOH Engineer for Foreigner

About Earthworks

David Blackmer’s originally founded Earthworks Audio to design and manufacture audiophile loudspeakers. The goal when starting the company was to make the best sounding speakers on the planet. In order to achieve this goal, Blackmer realized he needed to create his own measurement tools, built to a much higher standard. The first of which was an omnidirectional microphone, and led to the manufacture the OM1. David now thought that he could get back to designing his “dream” loudspeaker. His colleagues, however, persuaded him to design other microphones and preamplifiers. These products would soon set a new world standard for realism in the art of recording music. While they no longer make loudspeakers, they still apply the same strict design principles to the microphones and preamplifiers they are now famous for. And it is all made right here in the USA!

If you've been looking for the clean, uncolored sound of Earthworks Zero Distortion Preamplifiers, put a 521 preamp module in your 500 rack/PSU. For more information, call or chat with an RSPE representative today.

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