Advent MPR-1 mic pre

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k brown

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Jul 6, 2021
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San Francisco
I'd love to get a knowledgeable person's take on this circuit; the MPR-1 was an accessory sold for the Advent cassette deck (I believe the first w/Dolby), to provide mic inputs for the set of Beyer dynamics that they also sold rebranded Advent.

It appears to be a bit more sophisticated than the usual 'ring of three' - Expected performance? Ideas for improvement? I modded mine for transformerless inputs (the stock ones are quite tiny), and three-position gain sw - but would love to know if more could be gotten out of it.

Thanks
Advent MPR-1 schematic copy.jpg
 

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