Pioneer A-20-K: Connecting up

Connecting up 02

English

Chapter 2:

Connecting up

Making cable connections

Caution

• Before making or changing the connections, switch off the power and disconnect the power cord from the AC

outlet.

• Connect the power cord after all the connections between devices have been completed.

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En

• During playback, be sure that both the SPEAKERS

Caution

A button and SPEAKERS B button are set to ON

•The SIGNAL GND terminal is provided to reduce

(page 7).

noise when connecting the unit to components

such as an analog turntable.

• Do not connect the PHONO (MM) terminals to any

component other than a turntable; also, do not

connect to a turntable equipped with built-in

equalizer. An excessively high sound output may be

produced, resulting in damage to your speakers or

other devices.

• The unit’s PHONO (MM) terminals are designed to

be used with turntables equipped with MM

(moving-magnet) type cartridges. Turntables

equipped with MC (moving-coil) cartridges cannot

be used.

• Make sure not to bend the cables over the top of

this unit (as shown in the illustration). If this

happens, the magnetic field produced by the

transformers in this unit may cause a humming

noise from the speakers.

• The unit’s POWER AMP DIRECT terminals should

never be connected to any other component’s

connectors except PRE-AMP OUT.

• If your turntable has a grounding wire, secure it to

the ground terminal on this amplifier.

Caution

Note

• When using bi-wiring to connect speakers, avoid

• When connecting a tape cassette deck, playback

adverse affects on the amplifier by being sure to

noise may be heard, depending on the installation

remove the HIGH and LOW short bars provided

location. This noise is caused by leakage flux from

with the speakers. For detailed information, consult

the amplifier’s transformer. In this event, change

the instructions provided with the speakers.

the installation location, or move the deck farther

• When using speakers with removable network

from the amplifier.

circuits, note that if the network is removed, no

• iPod is a trademark of Apple Inc., registered in the

effect will be produced and damage may be caused

U.S. and other countries.

to the speaker.

• Another method of connection is to connect the

SPEAKERS A terminals to HIGH and the

SPEAKERS B terminals to LOW (reverse that shown

About “Bi-wiring”

in the illustration).

This unit can be used with speakers that support bi-

wiring. Be sure to connect the high-frequency and

low-frequency connections correctly.

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02 Connecting up

Connecting speaker cables

Connecting audio cables

Connect the white plug to the left (L) jack, and the red

1 Twist the cable cores.

plug to the right (R) jack. Be sure to insert the plugs fully

into the jacks.

2 Loosen the nut on the

SPEAKERS

terminal, and insert the speaker cable into

the exposed hole in the terminal shaft.

3 Retighten the terminal nut.

123

Caution

• When using only one set of speaker terminals

(SPEAKERS A or SPEAKERS B), or when utilizing

bi-wiring connections, the speaker used should

have a nominal impedance between 4 Ω and

16 Ω. When using both sets of terminals, the

connected speakers should have nominal

impedance between 8 Ω and 32 Ω. Consult the

instructions accompanying your speakers for

details regarding the impedance value.

• Make sure the positive and negative (+/–) terminals

on the amplifier match those on the speakers.

• These speaker terminals carry HAZARDOUS live

voltage. To prevent the risk of electric shock when

connecting or disconnecting the speaker cables,

disconnect the power cord before touching any

uninsulated parts.

• Make sure that all the bare speaker wire is twisted

together and inserted fully into the speaker

terminal. If any of the bare speaker wire touches the

back panel it may cause the power to cut off as a

safety measure.

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En

Using centralized control with other

Plugging in

Pioneer components (Except A-10)

Multiple Pioneer components equipped with CONTROL

Important

IN/OUT jacks can be connected to the A-30/A-20 unit,

• When going on a trip or otherwise not using the

allowing centralized control of the components via the

unit for an extended period, always disconnect the

remote sensor on the A-30/A-20. This also allows remote

power cord from its outlet. Note that various

control of components not equipped with a remote

internal settings will not be lost even if the power

sensor, or installed in places where the component’s

cord is disconnected from its outlet for an extended

remote sensor cannot be accessed.

time.

• If it is necessary to detach the power cord, first be

sure to press the 

/I

STANDBY/ON button on the

IN

front panel of the unit so the A-30/A-20 is turned

OFF or the A-10 is in standby mode before

OUT

detaching the cord.

CONTROL

Caution

• The use of a power cord other than the one provided

will invalidate the warranty, since Pioneer will not

be responsible for any damage incurred. (The

power cord provided with the model A-30 has a

rated current capacity of 10 A, while the cord

provided with the A-20/A-10 has a rated current

capacity of 2.5 A.)

• Do not use any power cord other than the one

supplied with this unit.

• Do not use the supplied power cord for any purpose

other than that described below.

After you’ve finished making all connections, plug the

unit into an AC outlet.

Note

• For connections use a commercially available

monaural miniplug cord (without resistor).

• When connecting the CONTROL IN/OUT jacks,

commercially available audio cords must also be

used to make analog connections. Merely

connecting the CONTROL IN/OUT jacks alone will

not allow proper system control.

1 Plug the supplied power cord into the

• When a control cord is connected to the A-30/A-

AC IN

socket on the rear panel of the unit.

20’s CONTROL IN jack, the unit cannot be

controlled by pointing the remote control at the A-

2 Plug the other end into an AC outlet.

30/A-20 (the remote sensor is automatically

disabled).

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