Pioneer GM-D9704 User Manual

Before you start

21

21

Before you start Setting the unit

Owner’s Manual
Manual de instrucciones

BRIDGEABLE FOUR-CHANNEL POWER AMPLIFIER
AMPLIFICADOR DE POTENCIA DE CUATRO CANALES EN PUENTE

GM-D8704
GM-D9704

English

Español

http://pioneer.jp/en/info/globalnetwork/

PIONEER CORPORATION

28-8, Honkomagome 2-chome, Bunkyo-ku,
Tokyo 113-0021, JAPAN

PIONEER ELECTRONICS (USA) INC.

P.O. Box 1540, Long Beach, California 90801-1540, U.S.A.
TEL: [phone]

PIONEER EUROPE NV

Haven 1087, Keetberglaan 1, B-9120 Melsele, Belgium/Belgique
TEL: [phone]

PIONEER ELECTRONICS ASIACENTRE PTE. LTD.

2 Jalan Kilang Barat, #07-01, Singapore 159346
TEL: [phone]

PIONEER ELECTRONICS AUSTRALIA PTY. LTD.

5 Arco Lane, Heatherton, Victoria, 3202 Australia
TEL: [phone]

PIONEER ELECTRONICS DE MÉXICO S.A. DE C.V.

Blvd.Manuel Ávila Camacho 138, 10 piso
Col.Lomas de Chapultepec, México, D.F. 11000
TEL: [phone]
FAX: [phone]

先鋒股份有限公司

台北市內湖區瑞光路407號8樓

電話： 886-(0)2-2657-3588

先鋒電子（香港）有限公司

香港九龍長沙灣道909號5樓

電話： 852-2848-6488

© 2018 PIONEER CORPORATION.
All rights reserved.

© 2018 PIONEER CORPORATION.
Todos los derechos reservados.

Thank you for purchasing this PIONEER
product

To ensure proper use, please read through this
manual before using this product. It is espe­cially important that you read and observe
WARNINGs and CAUTIONs in this manual.

Please keep the manual in a safe and accessible
place for future reference.

Visit our website

Visit us at the following site:

http://pioneer.jp/en/info/globalnetwork/

We offer the latest information about
PIONEER CORPORATION on our website.

If you experience problems

Should this product fail to operate properly,
please contact your dealer or nearest author­ized Pioneer Service Station.

Before connecting/
installing the amplifier

WARNING

! Slots and openings in the cabinet are provided

for ventilation to ensure reliable operation of
the product, and to protect it from overheat­ing. To prevent fire hazard, the openings
should never be blocked or covered with items
(such as papers, floor mat, cloths).

! This unit is for vehicles with a 12 V battery and

negative grounding. Before installing in re­creational vehicles, trucks or buses, check the
battery voltage.

! When installing this unit, make sure to con-

nect the ground wire first. Ensure that the
ground wire is properly connected to metal
parts of the car’s body. The ground wire of the

one of this unit must be connected to the car
separately with different screws. If the screw
for the ground wire loosens or falls out, it
could result in fire, generation of smoke or
malfunction.

! Be sure to install the fuse to the battery wire.
! Always use a fuse of the rating prescribed.

The use of an improper fuse could result in
overheating and smoke, damage to the pro­duct and injury, including burns.

! Check the connections of the power supply

and speakers if the fuse of the separately sold
battery wire or the amplifier fuse blows. Deter­mine and resolve the cause, then replace the
fuse with and identical equivalent.

! Always install the amplifier on a flat surface.

Do not install the amplifier on a surface that
is not flat or on a surface with a protrusion.
Doing so could result in malfunction.

! When installing the amplifier, do not allow

parts such as extra screws to get caught be­tween the amplifier and the automobile.
Doing so could cause malfunction.

! Do not allow this unit to come into contact

with liquids. Electrical shock could result.
Also, damage to this unit, smoke, and over­heating could result from contact with liquids.
The surfaces of the amplifier and any attached
speakers may also heat up and cause minor
burns.

! In the event of any abnormality, the power

supply to the amplifier is cut off to prevent
equipment malfunction. If this occurs, switch
the system power off and check the power
supply and speaker connections. If you are un­able to determine the cause, please contact
your dealer.

! Always disconnect the negative * terminal of

the battery beforehand to avoid the risk of
electric shock or short circuit during installa­tion.

! Do not attempt to disassemble or modify this

unit. Doing so may result in fire, electric
shock or other malfunction.

! When installing the amplifier, make sure to

leave space around the amplifier for ventila­tion to improve heat radiation. And install to a
location where it cannot be touched during
operation.

CAUTION

! Always keep the volume low enough to hear

outside sounds.

! Extended use of the car stereo while the en-

gine is at rest or idling may exhaust the bat­tery.

! This product is evaluated in moderate and tro-

pical climate condition under the Audio, video
and similar electronic apparatus - Safety re­quirements, IEC 60065.

! The graphical symbol

product means direct current.

placed on the

About the protection function

This product has protection function. When this
product detects something abnormal, the follow­ing functions will operate to protect the product
and speaker output.
! The POWER/PROTECT indicator will turn red

and the amplifier will shut down in the situa­tions outlined below.
— If the temperature inside the amplifier gets

too high.

— If a DC voltage is applied to the speaker

output terminal.

! The POWER/PROTECT indicator will turn red

and the output will be muted in the situations
outlined below.
— If the speaker output terminal and speaker

wire are short-circuited.

What’s what

GM-D8704

Front side

4

5

3

Rear side

GM-D9704

Front side

4

5

3

Rear side

To adjust the switch, use a flathead screwdri­ver if needed.

1 BASS BOOST REMOTE (bass boost level
remote control) jack

By connecting the Bass boost level remote
control to the jack on the main unit, you will
be able to select a bass boost level from
0 dB to 18 dB.
! Bass boost level setting applies only to

CHANNEL B (channel B) output.

6

6

<KYTZ18I>

<5707000013010V> ES

En

En

Setting the unit

Setting the unit Connecting the units

Connecting the units

Connecting the units

! For instruction of connecting the bass

boost remote control to the amplifier, see
the Connection diagram.

2 FREQ (cut off frequency) control

Cut off frequency selectable from 40 Hz to
500 Hz if the LPF/HPF select switch is set to
LPF or HPF.

3 GAIN (gain) control

Adjusting gain controls CHANNEL A (chan­nel A) and CHANNEL B (channel B) helps
align the car stereo output to the Pioneer
amplifier. Default setting is the NORMAL
position.
If the output remains low, even when the car
stereo volume is turned up, turn the con­trols to a lower level. If distortion occurs
when the car stereo volume is turned up,
turn these controls to a higher level.
! If using only one input plug, set the gain

controls for speaker outputs A and B to
the same position.

! For use with an RCA equipped car stereo

(standard output of 500 mV), set to the
NORMAL position. For use with an RCA
equipped Pioneer car stereo, with maxi­mum output of 4 V or more, adjust level
to match that of the car stereo output.

! For use with an RCA equipped car stereo

with output of 4 V, set to the H position.

4 LPF (low-pass filter)/HPF (high-pass fil­ter) select switch

Switch the settings based on the connected
speaker.
! When the Subwoofer is connected:

Select LPF. This eliminates high range
frequency and outputs low range fre­quency.

! When the full range speaker is con-

nected:
Select HPF or OFF. HPF eliminates low
range frequency and output high range
frequency. OFF outputs the entire fre­quency range.

5 INPUT SELECT (input select) switch

Select 2CH for two-channel input and 4CH
for four–channel input.

6 POWER/PROTECT indicator

The power indicator lights up to indicate
power ON.
! If something is not normal, the indicator

turns red.

Setting gain properly

! Protective function included to prevent

malfunction of the unit and/or speakers
due to excessive output, improper use or
improper connection.

! When outputting high volume sound etc.,

this function cuts off the output for a few
seconds as a normal function, but output
is restored when the volume of the head
unit is turned down.

! A cut in sound output may indicate impro-

per setting of the gain control. To ensure
continuous sound output with the head
unit at a high volume, set amplifier gain
control to a level appropriate for the preout
maximum output level of the head unit, so
that volume can remain unchanged and to
control excess output.

! Despite correct volume and gain settings,

the unit sound still cuts out periodically. In
such cases, please contact the nearest
authorized Pioneer Service Station.

Gain control of this unit

Preout level: 2 V (Standard: 500 mV)

Preout level: 4 V

Above illustration shows NORMAL gain set­ting.

Relationship between amplifier gain
and head unit output power

If amplifier gain is raised improperly, this will
simply increase distortion, with little increase
in power.

Signal waveform when outputting at
high volume using amplifier gain
control

If the signal waveform is distorted due to high
output, even if the amplifier gain is raised, the
output power will change only slightly.

Connection diagram

7

3

2

5

j

k

1

g

1 Battery wire (sold separately)

d

f

! The maximum length of the wire be-

tween the fuse and the positive + term­inal of the battery is 30 cm.

! For the wire size, refer to Connecting the

power terminal. The battery wire, the

ground wire and the optional direct
ground wire must be same size. After
making all other connections at the am­plifier, connect the battery wire terminal
of the amplifier to the positive + term­inal of the battery.

2 Fuse 80 A (GM-D8704) / 100 A (GM-D9704)

(sold separately)
Each amplifier must be separately fused at
80 A (GM-D8704) / 100 A (GM-D9704).

3 Positive + terminal
4 Negative (*) terminal
5 Battery (sold separately)
6 Ground wire, Terminal (sold separately)

8

6

4

9

a

b

h

c

e

i

The ground wires must be same size as the
battery wire.
Connect to metal body or chassis.

7 Car stereo with RCA output jacks (sold sepa-

rately)

8 External output

If only one input plug is used, do not connect
anything to RCA input jack B.

9 Connecting wire with RCA pin plugs (sold se-

parately)

a RCA input jack A
b RCA input jack B
c Amplifier with RCA input jacks (sold sepa-

rately)

d RCA output jack

Outputs the signal input to CH A.

e Speaker output terminals

Please see the following section for speaker
connection instructions. Refer to Connections
when using the speaker input wire.

f System remote control wire (sold separately)

Connect male terminal of this wire to the sys­tem remote control terminal of the car stereo.
The female terminal can be connected to the
auto-antenna relay control terminal. If the car
stereo lacks a system remote control terminal,
connect the male terminal to the power term­inal via the ignition switch.

g Fuse 30 A × 2 (GM-D8704) / 40 A × 2 (GM-

D9704)

h Front side
i Rear side
j Bass boost level remote control wire (5 m)
k Bass boost level remote control

Note

INPUT SELECT (input select) switch must be set.
For details, see Setting the unit.

Before connecting the
amplifier

WARNING

! Secure the wiring with cable clamps or adhe-

sive tape. To protect the wiring, wrap sections
in contact with metal parts in adhesive tape.

! Never cut the insulation of the power supply

to feed power to other equipment. Current ca­pacity of the wire is limited.

CAUTION

! Never shorten any wires, the protection circuit

may malfunction.

! Never wire the speaker negative cable directly

to ground.

! Never band together multiple speaker’s nega-

tive cables.

! If the system remote control wire of the ampli-

fier is connected to the power terminal via the
ignition switch (12 V DC), the amplifier will re­main on with the ignition whether the car
stereo is on or off, which may exhaust battery
if the engine is at rest or idling.

! Install and route the separately sold battery

wire as far as possible from the speaker wires.
Install and route the separately sold battery
wire, ground wire, speaker wires and the am­plifier as far away as possible from the anten­na, antenna cable and tuner.

About bridged mode

! Do not install or use this amplifier by wiring

speakers rated at 2 W (or lower) in parallel to
achieve a 1 W (or lower) bridged mode (Dia­gram B).
Amplifier damage, smoke, and overheating
could result from improper bridging. The am­plifier surface could also become hot to the
touch and minor burns could result.
To properly install or use a bridged mode and
achieve a 2 W load, wire two 4 W speakers in
parallel with Left + and Right * (Diagram A)
or use a single 2 W speaker.
In addition, refer to the speaker instruction
manual for information on the correct connec­tion procedure.

! For any further enquiries, contact your local

authorized Pioneer dealer or customer
service.

About suitable
specification of speaker

Ensure speakers conform to the following
standards, otherwise there is a risk of fire,
smoke or damage. Speaker impedance is 2 W
to 8 W,or4W to 8 W for two-channel and other
bridge connections.

Subwoofer

Speaker channel Power

Four-channel output

Two-channel output

Three-channel
Speaker output A

Three-channel
Speaker output B

Other than subwoofer

Speaker channel Power

Four-channel output

Two-channel output

Three-channel
Speaker output A

Three-channel
Speaker output B

Nominal input:
Min. 100 W (GM-D8704)
Min. 130 W (GM-D9704)

Nominal input:
Min. 300 W (GM-D8704)
Min. 400 W (GM-D9704)

Nominal input:
Min. 100 W (GM-D8704)
Min. 130 W (GM-D9704)

Nominal input:
Min. 300 W (GM-D8704)
Min. 400 W (GM-D9704)

Max. input:
Min. 200 W (GM-D8704)
Min. 260 W (GM-D9704)

Max. input:
Min. 600 W (GM-D8704)
Min. 800 W (GM-D9704)

Max. input:
Min. 200 W (GM-D8704)
Min. 260 W (GM-D9704)

Max. input:
Min. 600 W (GM-D8704)
Min. 800 W (GM-D9704)

En

En

En

En

Connecting the units

5

Connecting the units

Connecting the units

Connecting the units

Connecting the speakers

The speaker output mode can be four-channel,
three-channel (stereo and mono) or two-chan­nel (stereo or mono). Connect the speaker
leads based on the mode and the figures
shown below.

Four-channel output

1

4

2

2

3

1

1 Left
2 Right
3 Speaker output A
4 Speaker output B

Two-channel output (Stereo)

1

2

1 Speaker output (Right)
2 Speaker output (Left)

Two-channel output (Mono)

1 Speaker output (Mono)

Three-channel output

1 Left
2 Right
3 Speaker output A
4 Speaker output B (Mono)

Connections when using

1

the RCA input jack

Connect the car stereo RCA output jack and

4

the RCA input jack of the amplifier.
! The RCA output jack of this unit outputs

the signal that comes from The RCA input
jack A.

Four-channel / Three-channel output

! Slide INPUT SELECT (input select) switch

1

1

3

2

4

to 4CH position.

5

1 RCA input jack A
2 RCA input jack B
3 Connecting wires with RCA plugs (sold sepa-

rately)

4 From car stereo (RCA output)

If only one input plug is used, e.g. when the
car stereo has only one output (RCA output),
connect the plug to RCA input jack A rather
than B.

5 INPUT SELECT (input select) switch (4CH po-

sition)

1

2

3

4

1 RCA input jack A

For two-channel output, connect the RCA
plugs to the RCA input jack A.

2 Connecting wire with RCA pin plugs (sold se-

parately)

3 From car stereo (RCA output)
4 INPUT SELECT (input select) switch (2CH

position)

Two-channel output (Stereo) / (Mono)

! Slide INPUT SELECT (input select) switch

to 2CH position.

1

Connections when using
the speaker input wire

Connect the car stereo speaker output wires
to the amplifier using the supplied speaker
input wire with RCA pin cord.

Solderless terminal
connections

! Since the wire will become loose over time,

it must be periodically inspected and tigh­tened as necessary.

! Do not solder or bind the ends of the

twisted wires.

2

! Fasten while making sure to not to clamp

the insulating sheath of the wire.

3

! Use the supplied hexagonal wrench to

tighten and loosen the terminal screw of
the amplifier and use it to securely fasten
the wire. Be careful to avoid excessive tigh­tening of this screw, which may damage

1 Car Stereo
2 Speaker output
3 Red: Right +
4 Black: Right *
5 Black: Left *
6 White: Left +
7 Speaker input wire with RCA pin cord

To the RCA input jack of this unit

Notes

! If speaker input wires from a headunit are

connected to this amplifier, the amplifier will
automatically turn on when the headunit is
turned on. When the headunit is turned off,
the amplifier turns off automatically. This
function may not work with some headunits.
In such cases, please use a system remote
control wire (sold separately). If multiple am­plifiers are to be connected together synchro­nously, connect the head unit and all
amplifiers via the system remote control wire.

! Connect the system remote control wire when

you wish to only turn on the car stereo, not the
amplifier.

! This amplifier automatically selects an input

signal mode between the RCA level and the
speaker level by detecting an input signal.

the wire.

Connecting the power terminal

WARNING

If the battery wire is not securely fixed to the term­inal using the terminal screws, there is a risk of
overheating, malfunction and injury, including
minor burns.

! Always use the recommended battery and

ground wire, which is sold separately. Con­nect the battery wire directly to the car bat­tery positive (+) terminal and the ground
wire to the car body.

! Recommended wires size (AWG: American

Wire Gauge) is as follows. The battery wire,
the ground wire and the optional direct
ground wire must be same size.

! Use a wire of 8 AWG to 16 AWG wire for the

speaker wire.

Battery wire and ground wire size

GM-D8704

Wire length Wire size

less than 4.5 m 8 AWG

less than 7.2 m 6 AWG

less than 11.4 m 4 AWG

GM-D9704

Wire length Wire size

less than 2.2 m 8 AWG

less than 3.6 m 6 AWG

less than 6.4 m 4 AWG

1 Route battery wire from engine com­partment to the vehicle interior.

! When drilling a cable pass-hole into the ve-

hicle body and routing a battery wire thor­ough it, take care not to short-circuit the
wire damaging it by the cut edges or burrs
of the hole.

After completing all other amplifier connec­tions, finally connect the battery wire terminal
of the amplifier to the positive + battery term­inal.

2

1

1 Positive + terminal
2 Battery wire (sold separately)

The maximum length of the wire between
the fuse and the positive + terminal of the
battery is 30 cm.

3 Fuse 80 A (GM-D8704) / 100 A (GM-D9704)

(sold separately)
Each amplifier must be separately fused at
80 A (GM-D8704) / 100 A (GM-D9704).

3

2 Use wire cutters or a utility knife to
strip the end of the battery wire, ground
wire and system remote control wire to ex­pose about 10 mm of the end of each of
the wires, and then twist the exposed ends
of the wires.

Twist

10 mm

3 Connect the wires to the terminal.

Fix the wires securely with the terminal
screws.

7

6

2

4

1

3

1 Battery wire
2 Power terminal
3 Ground wire
4 GND terminal
5 System remote control wire
6 System remote control terminal
7 Terminal screws

En

En

En

En