nisam siguran da li taj reciever uopće radi sa 4 ohma zvučnicima(mislim da je 6 min):
https://europe.yamaha.com/files/down...GLFH_En_D0.pdf
Speaker requirements
Speakers and subwoofers to be connected to the unit must meet the following
requirements:
• Under its default settings, the unit is configured for 8-ohm speakers. When
connecting 6-ohm speakers, set the unit’s speaker impedance to “6 Ω MIN”. For
details, see the following:
– “Setting the speaker impedance” (p.18)
Iako u speckama spominju 4 ohma, ja bih ipak stavio bar 6 ohma zvučnike. I prema toj logici, nije čudno da je reciever otišao u protected mod, jer su zvučnici s premalim otporom.