I think I have resolved the Flying Mole Input Impedance question; at least I have an official reply from Flying Mole. I'm glad I didn't assume that the value quoted in the Soundstage Review (100kohm) was correct or the value in the owner's manual (4.7 kohm) either, because apparently neither is correct.
This is the message I sent to Flying Mole:
I have read in some places that the input impedance of these units is 100kohm, yet in the owner's manual it states that it is 4.7 kohm. Which value is correct?
This is the reply I received from Flying Mole
You are right we made wrong answer to some magazine in last year
simply due to misunderstanding.
We have not change input impedance of DAD-M100pro;
HT type has 10kohm and BB/BI type have 47kohm.
We apologize creating your confusion.
Thank you for your kind understanding.
Regards,
Customer Relations
Hideo Sugimori