Earthworks 521 ZDT Mic Preamp

Earthworks' Zero Distortion Technology is designed to eliminate the subtle harmonic colorations often introduced by preamp circuitry. This results in an exceptionally clean, transparent signal that captures your microphone's output exactly as it sounds, without adding any unwanted character or grit.

Yes, the 521 ZDT is an excellent choice for ribbon microphones. Its ultra-low noise floor and high-quality gain allow you to capture the delicate nuances of ribbon mics without introducing hiss, even when you need to push the gain for quieter sources.

The 5dB steps provide precise, repeatable gain settings, which is ideal if you need to match levels between takes or stereo pairs. While it lacks a continuous gain knob, the stepped design ensures that your settings remain consistent and easy to recall for future sessions.

No, the 521 ZDT is strictly a microphone preamp and does not feature a dedicated instrument (DI) input. You will need a separate DI box if you intend to record high-impedance instruments like electric guitars or basses.

While the human ear cannot hear frequencies at those extremes, this wide bandwidth ensures that the preamp maintains perfect phase linearity and transient response within the audible spectrum. This results in a more 'open' and detailed sound, particularly in the high-frequency transients of percussion and acoustic instruments.

The 521 ZDT is compatible with any standard 500-series rack that provides the necessary power requirements. As long as your chassis is properly powered and meets the standard 500-series voltage specifications, this module will function perfectly.