JBL Stage A130 on a Yamaha R-N800A: which impedance setting, and why the menu hides it
Yes. The R-N800A into the Stage A130 stays inside the amplifier's impedance rating. At 3.0 m the pair reaches about 101.2 dB in a typical room.
The Yamaha R-N800A is a fair match for the JBL Stage A130. The nominal impedance is inside the amplifier's rating, which is the condition that matters.
At 3.0 m in a typical room, the stereo pair reaches about 101.2 dB. The second speaker and the room each contribute roughly 3 dB, which is the usual allowance for home listening. That sits 3.8 dB under a 105 dB theatrical peak, so loud film moments are where an amplifier with more voltage starts to matter.
Behind that level: the R-N800A is rated 100 W into 8 Ω, and the Stage A130 works out to about 84.8 dB for 1 W at 1 m from the sensitivity the maker actually published. Nominal impedance is 6 Ω.
An amplifier rated above the speaker is not automatically dangerous. Clipping from too little power is what sends extra energy into the tweeter. Keep the volume clean, and treat an unpublished impedance dip as unknown rather than as a guessed fraction of the nominal.