Yamaha A-S300BL owner manual Rear panel, 4 En, IMPEDANCE SELECTOR switch

CONTROLS AND FUNCTIONS

Rear panel

(Taiwan and Central/South America models)

1CD input jacks

Used to connect a CD player (see page 5).

2PHONO jacks and GND terminal

Used to connect a turntable that uses an MM cartridge, and to ground the terminal (see page 5).

3Audio input/output jacks

Used to connect external components, such as a tuner, etc (see page 5).

4DOCK jack

Used to connect an optional Yamaha Universal Dock for iPod or Wireless System for iPod (see page 10).

5SUBWOOFER OUT jack

Used to connect a subwoofer with built-in amplifier (see page 5).

6POWER MANAGEMENT switch

Enables or disables the automatic power down function (see page 7).

7SPEAKERS A/B terminals

Used to connect one or two speaker sets (see page 5).

8VOLTAGE SELECTOR switch

(Taiwan and Central/South America models only)

The VOLTAGE SELECTOR switch must be set to your local main voltage before plugging the power cable into the wall outlet (see page 7).

9IMPEDANCE SELECTOR switch

See IMPEDANCE SELECTOR switch on this page.

0Power cable

Connect the power cable into the wall outlet (see page 7).

■IMPEDANCE SELECTOR switch

CAUTION

Do not change the IMPEDANCE SELECTOR switch while the power of this unit is turned on, as doing so may damage the unit.

If the unit fails to turn on, the IMPEDANCE SELECTOR switch may not be fully slid to either position. If this is the case, remove the power cable and slide the switch all the way to either position.

Select the switch position (LOW or HIGH) according to the impedance of the speakers in your system.

Switch	Impedance level
position
	• If you use one set (A or B), the impedance of
	each speaker must be 6 Ω or higher.
	• If you use two sets (A and B) simultaneously,
HIGH	the impedance of each speaker must be 12 Ω
	or higher.
	• If you make bi-wire connections, the
	impedance of each speaker must be 6 Ω or
	higher. See page 6 for details.
	• If you use one set (A or B), the impedance of
	each speaker must be 4 Ω or higher.
	• If you use two sets (A and B) simultaneously,
LOW	the impedance of each speaker must be 8 Ω or
	higher.
	• If you make bi-wire connections, the
	impedance of each speaker must be 4 Ω or
	higher. See page 6 for details.

4 En