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- Apr 24, 2019
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Yes, I would imagine that separate inputs would be necessary if there were to be two separate RIAA stages. But judging from your message, you clearly know more about these issues than I do .I looked hard at the pics of the preamp and its PCB and think that there is only on RIAA stage (the opamps with those 2 red caps, 1 per channel) and probably also only one amplifying stage (U5 for one channel) in front of it, with the Dip switches changing the gain. Those preamps which are optimized for both MM and MC usually have separate inputs, separate amplifying stages and very often separate RIAA stages. I might be wrong though.