MPDI-4
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Extreme Flexibility
The MPDI-4 is as musical as it is powerful and flexible. It features 4 individual Mic Preamp/DI circuits housed in a single 1RU chassis. With bypass-able transformers, switchable output headroom, and adjustable THD characteristics, the sound of the MPDI-4 can range from astonishingly pristine to warm, thick, and harmonically colorful. It may well be the only preamp that is truly perfect for every situation!
Class A, with or without transformers
The MPDI-4 grew out of the Class A console Eric Valentine and Larry Jasper built in 2007. Two things from that project make it possible: a Class A amplifier design that is as efficient as Class A/B, and high-voltage transistors with enough headroom that every transformer can be bypassed.
With the input and output transformers engaged, you get the familiar sound of a vintage Class A preamp in the tradition of EMI, Helios and Neve. Bypass them and the preamp runs transformerless and fully Class A, a strikingly pristine sound suited to classical, orchestral, jazz and film score recording.
Features
- -10 to -60 dB boost range (in stepped 5 dB increments)
- Switchable -20 dB input pad and -10 dB output pad
- Instrument DI
- Switchable 600 ohm output load
- Switchable low impedance mode ideal for passive ribbon microphones
- Front panel XLR and 1/4-inch (DI) combo input
- Phase reverse switch
- +48 V phantom power
- Bypass-able input and output transformers
- All-XLR mic-pre input and mic-pre direct line output
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“Just the idea that I can do all of this with a single-rackspace preamp has me in my happy place.”
“Overall, I absolutely loved this thing, and it's exciting to see smaller gear manufacturers take on the challenges of a “no compromises” attitude towards gear design.”