MPC-600 Mic Preamp Card: 

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!

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