Yamaha R-V905 Owner's Manual - Page 20
Impedance Selector Switch, If This Unit Fails To Turn On When The Standby
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IMPEDANCE SELECTOR SWITCH WARNING Do not change the IMPEDANCE SELECTOR switch setting while the power of this unit is on, otherwise this unit may be damaged. IF THIS UNIT FAILS TO TURN ON WHEN THE STANDBY/ ON SWITCH IS PRESSED, the IMPEDANCE SELECTOR switch may not be fully set to either end. If so, set the switch to either end fully. IMPEDANCE SELECTOR (U.S.A. model) Select the position whose requirements your speaker system meets. (Upper position) Main: If you use one pair of main speakers, the impedance of each speaker must be 4Ω or higher. If you use two pairs of main speakers, the impedance of each speaker must be 8Ω or higher. Center: The impedance of the speaker must be 6Ω or higher. Rear: The impedance of each speaker must be 6Ω or higher. IMPEDANCE SELECTOR SET BEFORE POWER ON MAIN A OR B: 4ΩMIN. /SPEAKER A + B: 8ΩMIN. /SPEAKER CENTER: 6ΩMIN. /SPEAKER REAR : 6ΩMIN. /SPEAKER MAIN A OR B: 8ΩMIN. /SPEAKER A + B:I6ΩMIN. /SPEAKER CENTER: 8ΩMIN. /SPEAKER REAR : 8ΩMIN. /SPEAKER AC OUTLETS SWITCHED 100W MAX. TOTAL L MAINS (Lower position) Main: If you use one pair of main speakers, the impedance of each speaker must be 8Ω or higher. If you use two pairs of main speakers, the impedance of each speaker must be 16Ω or higher. Center: The impedance of the speaker must be 8Ω or higher. Rear: The impedance of each speaker must be 8Ω or higher. 20