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Earthworks 521 Zero Distortion Microphone Preamp
  • Earthworks 521 Zero Distortion Microphone Preamp
  • Earthworks 521 Zero Distortion Microphone Preamp
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Earthworks 521 Zero Distortion Microphone Preamp

Manufacturer: Earthworks, Inc.

Item #: ETW-521   •   MFG #: 521


List Price:$1,249.00
Our Price:$999.00

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Availability: Usually ships in 3-10 business days
This item is currently out of stock and will ship the minute we receive it – normally 3-10 business days. Need it sooner? Call 800-522-2025 and we'll make it happen,or email Customer Service for expedited delivery options. Certain Non-Stock Items Valued over $50.00 may Ship FREE UPS GROUND in the Continental US. Multiple quantities of the same non-Stock Item Valued below $50.00 may be ordered to meet the $50 minimum order requirement to qualify for Free UPS Ground Freight. This offer does not apply to certain freight-intensive or hazardous items. Certain restrictions may apply.
  • Special Order Item: non-cancelable, non-returnable, non-refundable.



Required Accessories

Based on the Earthworks ZDT Zero Distortion Preamplifiers technology designed by David Blackmer, the 521 brings the exacting standards of the Earthworks Zero Distortion Technology preamplifiers to the convenient 500 series format.

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.

  • 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
    • Requires a 500 series rack
  • Specifications

    • Preamp Type: Solid State
    • Number of Channels: 1
    • Frequency Response: 2Hz to 100kHz ±0.1dB, 1Hz to 200kHz ±0.5dB
    • Impulse Response: 1.4æs
    • Distortion: XLR out: less than 1ppm (0.0001%); 1/4" out: 0.001%
    • Input Noise: 1.6nVHz1/2 at 20dB gain; 0.6nV/Hz1/2 at 60dB gain
    • EIN: -132dBV at 20dB gain; -143dBV at 60dB gain
    • Slew Rate: 22V/æs
    • Output DC Offset: ±1 mV typical, servo balanced
    • Input / Output Connector: 500 Series EDAC Edge connector
    • XLR Input Impedance: 10K Ohms phantom on, 100K Ohms phantom off
    • Front Panel Balanced Out: 1/4" TRS XLR Fem. balanced transformerless (variable)
    • Dimensions: 1 500 series rack space 1.5" x 5.25" x 6"
    • Weight: 0.8 lb. (0.36kg)

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