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Earthworks 521 ZDT now shipping

Earthworks’ first 500 series module, the 521 ZDT preamp, features Zero Distortion Technology designed by David Blackmer. The preamp was announced at Winter NAMM 2013.

Earthworks’ first 500 series module, the 521 ZDT preamp, is now shipping. The company launched the 521 ZDT at NAMM 2013. Based on Zero Distortion Technology (ZDT) designed by David Blackmer, the Earthworks 521 features the same sonic quality found in the company’s 1U ZDT preamp units. “Earthworks is continually developing precision audio products that elevate the audio chain,” said Heidi Blackmer Robichaud, president/CEO of Earthworks. “We are thrilled to introduce the new 521 preamp, our first ever 500 series preamp, giving recordists an Earthworks ZDT preamp option for their 500 series racks.” The solid state 521 features switchable phantom power, polarity invert, and peak amplitude clip detection, just as in the original ZDT Zero Distortion preamplifiers. The transformerless output stage of the 521 will easily drive long cable runs without loss of quality. Transparent gain is switchable from 5dB to 60dB in 5dB steps. According to the company the Earthworks mic amp topology provides outstanding common mode rejection, overload margin and low noise floor, combined with the ultra wide bandwidth of the ZDT Preamps (1Hz to 200kHz +0.5dB) and distortion of less than 1 part per million (0.0001%). This level of performance is maintained over a range of impedances applied to the input, making the 521 ZDT suitable for a wide range of microphones – ribbon, dynamic or condenser.