Apparently, I can set the speaker impedance under the Yamaha's advance setup menu. Excerpt from the manual:
■ Speaker impedance SPEAKER IMP.
Use this feature to set the speaker impedance of this unit
so that it matches that of your speakers.
Choices: 8ΩMIN, 6ΩMIN
• Select “8ΩMIN” to set the speaker impedance to 8 Ω .
• Select “6ΩMIN” to set the speaker impedance to 6 Ω
Speaker Imp........Speaker.......Impedance Level
8ΩMIN................Front..........The impedance of each speaker must be 8Ω or higher.
8ΩMIN................Centre........The impedance of each speaker must be 8Ω or higher.
8ΩMIN................Surround......The impedance of each speaker must be 8Ω or higher.
6ΩMIN................Front..........The impedance of each speaker must be 4Ω or higher.
6ΩMIN................Centre........The impedance of each speaker must be 6Ω or higher.
6ΩMIN................Surround......The impedance of each speaker must be 6Ω or higher.
So does that mean the receiver is capable of driving a 4Ω front speaker like M80?
