John Hardy MPC-600 MicrophonePreamplfierCard Superior Plug-In Replacement for MCI 600-Series Preamplifiers

A superior plug-in replacement for MCI 600-series console mic preamps. The MPC-600 drastically improves performance by using a combination of the Jensen JT-16-B mic input transformer (Jensen's best mic input model), the 990C discrete class-A op-amp, and the total absence of coupling capacitors in the signal path. Just plug it in!

Features:

• Jensen's JT-16-B Input Transformer
• 990 Discrete Class-A Op-Amp
• Elimination of all coupling capacitors from the signal path
• 1% 100ppm Metal Film Resistors
• Electrolytic Capacitors with a 105°C Temperature rating
• Fully Sealed 25-turn Cermet Trim Pots

Specifications:

• E.I.N., 20-20kHz unweighted
  • 150 Ohm source: -129 dBu
  • 0 Ohm source: -132 dBu
• Maximum input level =20Hz: +9 dBu
• Maximum output level at 990 output 75 Ohm load: +21 dBu
• CMRR
  • 100Hz: 100 dB
  • 10kHz: 80 dB
• Deviation from linear phase 20Hz-120kHz: < 2 deg
• THD:
  • 60dB gain, 10k Ohm load, +21dBu output
    • 10kHz: 0.005 %
    • 1kHz: 0.004 %
  • 40dB gain, 600 Ohm load, +21dBu output
    • 10kHz: 0.003 %
    • 1kHz: 0.003 %
  • 40dB gain, 75 Ohm load, +21dBu output
    • 10kHz: 0.030 %
    • 1kHz: 0.005 %
  • DC offset < 100 µV