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User Manual for Earthworks 521 ZDT Single-Channel Mic Preamplifier for 500 Series Racks Click to enlarge the picture
Contents of the user manual for the Earthworks 521 ZDT Single-Channel Mic Preamplifier
- Product category: Microphone Preamps Earthworks
- Brand: Earthworks
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Earthworks Microphone Preamps
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User manual for the Earthworks 521 ZDT Single-Channel Mic Preamplifier contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Earthworks product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Earthworks user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Earthworks product will considerably shorten its lifespan!
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Product description Based on the ZDT Preamp technology designed by David Blackmer, the 1 RU space 521 ZDT Single-Channel Mic Preamplifier from Earthworks brings the exacting standards of the Zero Distortion Technology preamplifiers to the convenient 500 series format.
The solid-state 521 ZDT Preamplifier features switchable phantom power, polarity invert, and peak amplitude clip detection. The transformerless output stage of the 521 ZDT preamplifier can easily drive long cable runs without loss of quality, making it suitable for remote recordings. Transparent gain is switchable from 5 to 60 dB in 5 dB steps.
The Earthworks microphone preamplifier topology provides strong common mode rejection, a high overload margin, and a low noise floor, combined with the wide bandwidth of the ZDT preamplifiers (1 Hz to 200 kHz +0.5 dB), and distortion of less than one part per million (0.0001%). This level of performance is maintained over an extensive range of impedances applied to the input, making the 521 ZDT preamplifier suitable for practically any microphone—ribbon, dynamic, or condenser. - Clean, uncolored 500 series preamplifier for standard 500 series racks (required; sold separately)
- Zero distortion, less than 1 ppm (>0.0001%)
- Solid state, transformerless
- Switchable 48V phantom power
- Peak amplitude clip detection
- Transparent gain switchable from 5 to 60 dB in 5 dB steps
- High output level of +30 dBu
- Fully differential (balanced) from input to output (i.e., no internal conversion to single-ended)
- All discrete components; Class A amplification (no ICs and electrolytic capacitors in signal path)
- Greater transparency with minimum signal path and features
- Suitable for most ribbon, dynamic, or condenser microphones
In the Box Earthworks 521 ZDT Single-Channel Mic Preamplifier for 500 Series Racks (1 RU Space) Limited 15-Year Warranty on Parts & Labor Table of Contents
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Technical parametersEarthworks 521 Specs | Preamplifier | Type: Solid state | | Number of Channels | 1 | | Frequency Response | 2 Hz to 100 kHz ± 0.1 dB
1 Hz to 200 kHz ± 0.5 dB | | Impulse Response | 1.4 µs | | Distortion | XLR Out: less than 1 ppm (0.0001%)
1/4" Out: 0.001% | | Input Noise | 1.6 nV/Hz½ at 20 dB gain
0.6 nV/Hz½ at 60 dB gain | | EIN | -132 dBV at 20 dB gain
-143 dBV at 60 dB gain | | Slew Rate | 22 V/µs | | Output | DC Offset: ±1 mV typical, servo balanced | | Input / Output Connectors | 500 series EDAC Edge connector | | Input Impedance | XLR: 10 kΩ phantom on
100 kΩ phantom off | | Front Panel | Balanced Out: 1/4" TRS XLR female, balanced, transformerless (variable) | | Dimensions | One 500 series rack space: 1.50 x 5.25 x 6.00" (38.10 x 133.35 x 152.40 mm) | | Weight | 0.80 lb (0.36 kg) |
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