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The sound in tuner is born in intimidate frequency stage. Still it looks like the Sound of tuner is still mostly described by stereo decoder and output stage.  I have two Sansuis TU-X1 that have against the certain station virtually identical sound. I said “virtually” because the delta that is there is irrelevant for the experiment. So, I driver the TU-X1 multiplex decoder from Sansui’s own intimidate frequency and another TU-X1 with  totally another tuner. The other tuner has completely different way more sophisticated and immuned from overload front-end (10 gang tube-based, nuvistors) end completely different, nightly elaborate intimidate frequency stage. The set the input voltage to the Multiplex-only TU-X1 identical to what Sansui was getting from own IF stage.  Can you predict the result?

Wrong, the full TU-X1 and the Multiplex-only TU-X1 sound identical. I mean there is a minor difference but this difference is exactly the delta that I decried above as “virtual”. What does it say? That says that it should be given more attention to Multiplexing and out stage. To settle the thing I am experimenting with discrete tubes Multiplex decoders, who knows, perhaps the switching discrete decoders would be more interesting sonically. The minor problems that I have that I do not have any objections in regards to Sound I am getting out of the TU-X1’s Multiplex and output stage…

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