Yamaha A12 Руководство пользователя - Страница 3

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Connections

• Before connecting the device to other devices, turn off the power for all

devices. Before turning the power on or off for all devices, set all

volume levels to minimum.

• Use only speaker cables for connecting speakers to the speaker jacks.

Use of other types of cables may result in ﬁre.

• Be sure to observe the ampliﬁer's rated load impedance (see page 4),

particularly when connecting speakers in parallel. Connecting an

impedance load outside the ampliﬁer's rated range can damage the

ampliﬁer.

Handling caution

• When choosing a power ampliﬁer to use with your speakers, make sure

that its power output matches the speakers' power capacity (refer to the

Speciﬁcations on page 4). Even if the ampliﬁer's power output is lower

than the speakers' PGM (program) power capacity, the speakers may be

damaged when clipping of a high input signal occurs. The following

may cause damage to speakers:

- Feedback caused when using a microphone.

- Continuous high sound pressure level produced by electronic instruments.

- Continuous high-power output of distorted signals.

- Popping noises caused by turning on equipment, or by connecting or

disconnecting system components while the ampliﬁer is turned on.

• When turning on the AC power in your audio system, always turn on the

power ampliﬁer LAST, to avoid speaker damage. When turning the

power off, the power ampliﬁer should be turned off FIRST for the same

reason.

• Do not operate this device at high volume levels or at a level that is

uncomfortable, since it is capable of producing sound levels that could

cause permanent hearing loss. If you experience any discomfort or

ringing in the ears, or suspect an hearing loss, you should consult an

audiologist.

Yamaha cannot be held responsible for damage caused by improper use or modiﬁcations to the device.

Before Making Connections

■ Phone Plug Wiring

Phone plugs for connection to the phone jack inputs should be wired as

shown on the right. Be sure to use proper speaker cable — NOT shielded

instrument or line cable — for all speaker connections.

■ Neutrik NL4FC Plug Wiring

If you will be using the Neutrik connectors for speaker input,

wire the plugs as shown to the right. Be sure to use proper

speaker cable — NOT shielded instrument or line cable — for all

speaker connections.

Special Notice

Protective Circuit (poly switch)

All full-range loudspeakers are ﬁtted with a self-resetting poly switch that protects

the high-frequency driver from damage caused by excessive power. If a

loudspeaker cabinet loses high-frequency output, immediately remove power from

the unit and wait for two to three minutes. This should be long enough to allow the

poly switch to reset. Reapply power and check the performance of the high-

frequency driver before continuing, with the power reduced to a level that does not

cause the poly switch to interrupt the signal. (On the subwoofers, the poly switch

protects the woofer and a similar routine should be followed if the output is lost.)

• Use only Neutrik NL4FC plugs for connecting Speakon connectors.

* Illustrations in this manual are for explanatory purposes only, and may

not match the actual appearance of the product during operation.

* Company names and product names used in this Owner' s Manual are

trademarks or registered trademarks of their respective owners.

1+ : HOT (+)

1– : COLD (–)

Neutrik NL4FC connector

2– (NO USE)

2+ (NO USE)