Fredenstein HD High Permance Microphone Preamplifier

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HD Micpre
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HD MicPre

The Fredenstein HD microphone preamplifier utilizes a completely new approach to microphone level amplification.
With 96 kHz/192 kHz sampling rates becoming very popular while tracking, studios are still using equipment which cannot provide the frequency response or bandwidth provided by modern A/D converters.
The HD Pre overcomes these limitations especially for wider bandwidth sources such as acoustic instruments.

It is the preferred choice for classical recordings and Jazz recordings as well.
Besides incorporating a fully discrete signal path and a Class-A balanced output stage, the HD Pre uses a revolutionary current amplification circuit, which neutralizes limiting internal transistor capacitance.
As a result, the HD Pre features an unprecedented bandwidth of over 900 kHz.

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  • Frequency Response: 12 Hz – 700,000 Hz, +/- 1 dB
  • Distortion: < 0.0082 at +4 dBu Output Level (31 dB Gain)
  • Input Noise: < -131 dB at 150 Ohms Source Impedance (64dB Gain)
  • Input Impedance: > 200 kOhms or 1000 Ohms selectable
  • DI Impedance: > 2 MOhms
  • Max. Input Level: + 20 dBu,
  • PAD attenuation: - 20 dB
  • Output Impedance: 600 Ohms
  • Max. Output Level: + 26 dBu
  • Max Input Signal: +20 dBu (PAD activated)
  • (DI or Microphone Input) + 0dBu (without PAD)
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