I struggled a bit with the auto-translated version, especially since the article seems to assume some more knowledge in the terminology than I have. How has th

I struggled a bit with the auto-translated version, especially since the article seems to assume some more knowledge in the terminology than I have. How has the quality been lowered? Is it that the added resistance of the adapter (the article doesn't mention its capacitance/inductance, so I'd guess that's less significant) interacts with the inductive load of a speaker to create a filter, so now the frequency response is less flat?