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You're welcome, but I would suggest you should always take manufacturer's specs, be it Apple, Yamaha, or JBL, with a grain of salt. They often contain errors and typos.
Also don't take "-10dBV" and "+4dBu" literally. [And notice they aren't even the same units!] They are just shorthand/ballpark ways of describing "low level signals found in typical consumer gear" and "stronger level signals found in more pro gear".
JBL describes the input sensitivity as "92 dB @ 1M using the -10dBV setting of the switch" but they don't state:
A. what position the rotary knob is at during the test
B. the voltage level of the incoming signal
so it is not really very meaningful.
Last edited by m. zillch; 07-18-2018 at 12:20 AM.