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Setting the Unit

Gain Control and Bass Level

Control

Adjusting the gain controls A and B and

the bass level control (CH SUB) will

help match the output of the car stereo

to the Pioneer amplifier. Normally, set

these controls to the “NORMAL

(NORM.)” position. If the output is low,

even when the volume of the car stereo

is turned up, turn these controls clock-

wise. If there is distortion when the vol-

ume of the car stereo is turned up, turn

these controls counter-clockwise.

• If you only use one input plug, set the gain

controls for speaker outputs A and B to the

same position.

• When using with an RCA equipped car

stereo (standard output of 500 mV), set to

the NORMAL position. When using with

an RCA equipped Pioneer car stereo with

max. output of 4 V or more, adjust level to

match the car stereo output level.

• When you want to boost bass, turn the bass

level control clockwise.

Power Indicator

The power indicator lights when the

power is switched on.

HPF (High-Pass Filter) Select Switch (CH A and CH B)

Set the HPF select switch as follows according to the type of speaker that is connected to the

speaker output connector and the car stereo system:

HPF Select Audio frequency range Speaker Remarks

Switch to be output Type

OFF (Left) Full range Full range

HPF (Right) Low Frequency range to Full range Use if you want to cut the

High Frequency range very low frequency range

because it is not necessary

for the speakers you are

using.

BFC (Beat Frequency Control) Switch

If you hear a beat while listening to an

AM broadcast with your car stereo,

change the BFC switch using a small

standard tip screwdriver.

Thank you for purchasing this PIONEER

product. Before attempting operation, be

sure to read this manual.

In case of trouble

When the unit does not operate properly,

contact your dealer or the nearest autho-

rized PIONEER Service Station.

About This Product

This product is a 5-channel Class D amp.

Connect full range speakers to channels A

and B, and a subwoofer to the SUB chan-

nel.

For the SUB channel, if both L (left) and R

(right) are connected to the RCA input,

output is a mixture of the L and R signals.

WARNING

•Always use the special red battery and ground

wires ([RD-223]

2), which are sold separately.

Connect the battery wire directly to the car battery

positive terminal (+) and the ground wire to the

car body.

•Do not touch the amplifier with wet hands.

Otherwise you may get an electric shock. Also, do

not touch the amplifier when it is wet.

•For traffic safety and to maintain safe driving

conditions, keep the volume low enough so that

you can still hear normal traffic sound.

•Check the connections of the power supply and

speakers if the fuse of the separately sold battery

wire or the amplifier fuse blows. Detect the cause

and solve the problem, then replace the fuse with

another one of the same size and rating.

•To prevent malfunction of the amplifier and

speakers, the protective circuit will cut the power

supply to the amplifier (sound will stop) when an

abnormal condition occurs. In such a case, switch

the power to the system OFF and check the

connection of the power supply and speakers.

Detect the cause and solve the problem.

•Contact the dealer if you cannot detect the cause.

•To prevent an electric shock or short-circuit

during connection and installation, be sure to

disconnect the negative (–) terminal of the battery

beforehand.

•Confirm that no parts are behind the panel when

drilling a hole for installation of the amplifier. Be

sure to protect all cables and important equipment

such as fuel lines, brake lines and the electrical

wiring from damage.

Before Using This Product

PIONEER CORPORATION

4-1, MEGURO 1-CHOME, MEGURO-KU, TOKYO 153-8654, JAPAN

PIONEER ELECTRONICS (USA) INC.

P.O. Box 1540, Long Beach, California 90801-1540, U.S.A.

TEL: (800) 421-1404

PIONEER EUROPE NV

Haven 1087, Keetberglaan 1, B-9120 Melsele, Belgium

TEL: (0) 3/570.05.11

PIONEER ELECTRONICS ASIACENTRE PTE. LTD.

253 Alexandra Road, #04-01, Singapore 159936

TEL: 65-6472-1111

PIONEER ELECTRONICS AUSTRALIA PTY. LTD.

178-184 Boundary Road, Braeside, Victoria 3195, Australia

TEL: (03) 9586-6300

PIONEER ELECTRONICS OF CANADA, INC.

300 Allstate Parkway, Markham, Ontario L3R OP2, Canada

TEL: (905) 479-4411

PIONEER ELECTRONICS DE MEXICO, S.A. de C.V.

Blvd.Manuel Avila Camacho 138 10 piso

Col.Lomas de Chapultepec, Mexico, D.F. 11000

TEL: 55-9178-4270

Published by Pioneer Corporation.

Publicado por Pioneer Corporation.

Printed in U.S.A.

Impreso en los EE.UU.

<HRD0232-A> ES<KYMFX/03C00000>

5 channel power amplifier

Amplificador de potencia de 5 canales

Owner’s Manual

GM-D505

Manual del Propietario

Cut Off Frequency Control

You can select a cut off frequency from

40 to 240 Hz.

Connecting the Unit

CAUTION

•Disconnect the negative (–) terminal of the battery

to avoid the risk of short-circuit and damage to

the unit.

•Secure the wiring with cable clamps or adhesive

tape. To protect the wiring, wrap adhesive tape

around it where they lie against metal parts.

•Do not route wires where they will get hot, for

example where the heater will blow over them. If

the insulation heats up, it may become damaged,

resulting in a short-circuit through the vehicle

body.

•Make sure that wires will not interfere with mov-

ing parts of the vehicle, such as the gearshift,

handbrake or seat sliding mechanism.

•Do not shorten any wires. Otherwise the protec-

tion circuit may fail to work when it should.

•Never feed power to other equipment by cutting

the insulation of the power supply wire to tap

from the wire. The current capacity of the wire

will be exceeded, causing overheating.

Speaker Channel Speaker Type Power

Channel A (CH A) Other than subwoofer Max. input: Min. 100 W

Channel B (CH B) Other than subwoofer Max. input: Min. 100 W

Channel subwoofer Subwoofer Nominal input:

(CH SUB) Min. 175 W (4 ΩDrive)

Min. 330 W (2 ΩDrive)

To prevent damage

•Do not ground the speaker wire directly or con-

nect a negative (–) lead wire for several speakers.

•This unit is for vehicles with a 12-volt battery and

negative grounding. Before installing it in a recre-

ational vehicle, truck or bus, check the battery

voltage.

•If the car stereo is kept on for a long time while

the engine is at rest or idling, the battery may go

dead. Turn the car stereo off when the engine is at

rest or idling.

•If the system remote control wire of the amplifier

is connected to the power terminal through the

ignition switch (12 V DC), the amplifier will

always be on when the ignition is on— regardless

of whether the car stereo is on or off. Because of

this, the battery could go dead if the engine is at

rest or idling.

•Speakers to be connected to the amplifier should

conform with the standards listed below. If they

do not conform, they may catch fire, emit smoke

or become damaged. The speaker impedance must

be 4 to 8 ohms. Subwoofer impedance must be

from 2 to 8 ohms.

•Install and route the separately sold battery wire

as far away 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.

•Cords for this product and those for other prod-

ucts may be different colors even if they have the

same function. When connecting this product to

another product, refer to the supplied manuals of

both products and connect cords that have the

same function.

Connection Diagram

Grommet

Special red battery wire [RD-223] (sold separately)

After making all other connections at the amplifier,

connect the battery wire terminal of the amplifier to

the positive (+) terminal of the battery.

Ground wire (Black) [RD-223] (sold separately)

Connect to metal body or chassis.

Car stereo with

RCA output jacks

System remote control wire (sold separately)

Connect the male terminal of this wire to the system remote control

terminal of the car stereo (SYSTEM REMOTE CONTROL). The female

terminal can be connected to the auto-antenna relay control terminal. If

the car stereo does not have a system remote control terminal, connect the

male terminal to the power terminal through the ignition switch.

Fuse (30 A) ×2

Connecting wires with RCA pin

plugs (sold separately).

Speaker output terminal

See the Connecting the Speaker“

wires” section for speaker connection

instructions.

Fuse (25 A) ×3

RCA input jack A

RCA input jack B

RCA input jack SUB

External Output

(Front and Rear output)

External Output

(Subwoofer output)

Connecting the Power Terminal

•Always use the special red battery and ground

wires ([RD-223]

2), which are sold separately.

Connect the battery wire directly to the car battery

positive terminal (+) and the ground wire to the

car body.

1. Pass the battery wire from the

engine compartment to the interior

of the vehicle.

•After making all other connections to the

amplifier, connect the battery wire terminal of

the amplifier to the positive (+) terminal of

the battery.

2. Twist the battery wire, ground wire

and system remote control wire.

3. Attach lugs to wire ends. Lugs not

supplied.

•Use pliers, etc., to crimp lugs to wires.

4. Connect the wires to the terminal.

•Fix the wires securely with the terminal

screws.

Fuse (30 A)

Engine

compart-

ment

Interior of

the vehicle

Drill a 14 mm

hole into the

vehicle body.

Insert the O-ring rubber

grommet into the vehicle

body.

Twist

Positive terminal

Fuse (30 A)

Battery wire

Ground wire

Lug

GND terminal

Power terminal

Battery wire

System remote

control terminal

System remote

control wire

Ground wire

Connecting the Speaker Output

Terminals

1. Expose the end of the speaker wires

using nippers or a cutter by about

10 mm and twist.

2. Attach lugs to speaker wire ends.

Lugs not supplied.

•Use pliers, etc., to crimp lugs to wires.

3. Connect the speaker wires to the

speaker output terminals.

•Fix the speaker wires securely with the termi-

nal screws.

10 mm

Speaker

output

terminal

Terminal screw

Speaker wire

Speaker

output

terminal

Terminal screw

Speaker wire

Twist

Speaker wire

Lug

Connecting the Unit

Connecting the Speaker wires

Connect the speaker leads according to the figures shown below.

Combination of Input and Output

•If you use RCA input jack A only, speaker output for channel A, channel B and the SUB channel is

output from channel A.

•If you use RCA input jacks A and B only, output from channel A and channel B is unchanged, but out-

put from the SUB channel is a mixture of the channel A and channel B signals.

•If you use RCA input jack A and SUB only, channel A and channel B signals are output from channel

A, but output from the SUB channel remains unchanged.

•When not using RCA input jack B or SUB, do not connect anything to them.

≠

≠≠

≠

(Left)

Speaker output A

(Right)

RCA input jack A (CH A)

Speaker output

terminal

(Right)

Speaker output B

(Left)

RCA input jack B

(CH B)

Subwoofer output

RCA input jack SUB

(CH SUB)

CAUTION

•Do not install in:

—Places where it could injure the driver or pas-

sengers if the vehicle stops suddenly.

—Places where it may interfere with the driver,

such as on the floor in front of the driver’s

seat.

•Make sure that wires are not caught in the sliding

mechanism of the seats, resulting in a short-cir-

cuit.

•Confirm that no parts are behind the panel when

drilling a hole for installation of the amplifier.

Protect all cables and important equipment such

as fuel lines, brake lines and electrical wiring

from damage.

•Install tapping screws in such a way that the screw

tip does not touch any wire. This is important to

prevent wires from being cut by vibration of the

car, which can result in fire.

•To prevent electric shock, do not install the ampli-

fier in places where it might come in contact with

liquids.

•To ensure proper installation, use the supplied

parts in the manner specified. If any parts other

than the supplied ones are used, they may damage

internal parts of the amplifier, or they may

become loose causing the amplifier to shut down.

To prevent malfunction

•To ensure proper heat dissipation of the amplifier,

be sure of the following during installation.

—Allow adequate space above the amplifier for

proper ventilation.

—Do not cover the amplifier with a floor mat or

carpet.

•Do not install the amplifier near a door where it

may get wet.

•Do not install the amplifier on unstable places

such as the spare tire board.

•The best location for installation differs with the

car model and installation location. Secure the

amplifier at a sufficiently rigid location.

•Make temporary connections first and check that

the amplifier and the system operate properly.

•After installing the amplifier, confirm that the

spare tire, jack and tools can be easily removed.

Example of installation on the floor

mat or on the chassis

1. Place the amplifier where it is to be

installed. Insert the supplied tapping

screws (4 ×18 mm) into the screw

holes. Push on the screws with a

screwdriver so they make marks

where the installation holes are to be

located.

2. Drill 2.5 mm diameter holes at the

point marked, and install the ampli-

fier, either on the carpet or directly

to the chassis.

Installation

Drill a 2.5 mm diameter hole

Tapping-screws

(4 ×18 mm)

Floor mat

or chassis

Specifications

Power source .............................................................................................................. 14.4 V DC (10.8 — 15.1 V allowable)

Grounding system ............................................................................................................................................ Negative type

Current consumption ........................................................................................................ 43.8 A (at continuous power, 4 Ω)

Average current drawn* .......................................................................................................... 10.9 A (4 Ωfor five channels)

Fuse .......................................................................................................................................................................... 25 A ×3

Dimensions ........................................................................................................................ 350 (W) ×52 (H) ×268 (D) mm

Weight ...................................................................................................................... 3.9 kg (Leads for wiring not included)

Maximum power output ...................................................................................................... Channel A/B: 100 W ×4 (4 Ω)

Channel SUB: 300 W ×1 (4 1 (2 Ω) / 600 W × Ω)

Continuous power output .................................... Channel A/B: 50 W ×4 (at 14.4 V, 4 Ω, 20 — 20,000 Hz, 0.08% THD)

Channel SUB: 150 W ×1 (at 14.4 V, 4 Ω, 20 — 240 Hz, 0.2% THD)

Channel SUB: 300 W ×1 (at 14.4 V, 2 Ω, 20 — 240 Hz, 0.2% THD)

Load impedance ...................................................................................................... 4 8 Ω(Channel A/B: 4 —Ωallowable)

(Channel SUB: 2 — 8 Ωallowable)

Frequency response .................................................................................... Channel A/B: 10 — 40,000 Hz (+0 dB, 1 dB)–

Channel SUB: 5 240 Hz (+0.5 dB, 3 dB)— –

Signal-to-noise ratio .......................................................................................................................... 95 dB (IEC-A network)

Distortion ...................................................................................................................... Channel A/B: 0.01% (10 W, 1 kHz)

Channel SUB: 0.03% (10 W, 120 Hz)

Low pass filter (Channel SUB) .......................................................................................... Cut off frequency: 40 — 240 Hz

Cut off slope: –12 dB/oct

High pass filter (Channel A/B) .......................................................................................... Cut off frequency: 40 — 240 Hz

Cut off slope: –12 dB/oct

Bass level control (Channel SUB) .............................................................................................. +12 dB.................... 22 – —

(125 mV — 6.5 V)

Level/gain control (Channel A/B) .............................................................................................................. 200 mV — 6.5 V

Maximum input level/impedance ............................................................................................................ RCA: 6.5 V/22 kΩ

Note: