It was tried today by chance in order to find out if the connections in the input transformer box are in phase between input and output.
A very bad sound had been expected as the 1:10 ratio steps a 200Ω mic impedance to 20KΩ.
Signal path:
Male voice - Shure Unidyne B Mexico - Sowter 3104 connected as 1:10 - Sony TC-D5M connection to mic in L channel - Sennheisr HD580 - listener's ear, brain
Whiteout the input transformer the sound is nice.
With the input transformer the sound is impressive, focused, with no excessive bass or treble, much louder.
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