Pioneer GM-D8701 Manuale d'uso - Pagina 2

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1. Installation

Setting the unit

What's what

when the car stereo volume is turned up,

turn these controls to a higher level.

GM-D8701

! For use with an RCA equipped car stereo

Front side

(standard output of 500 mV), set to the

NORMAL position. For use with an RCA

equipped Pioneer car stereo, with maxi-

mum 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.

! If you hear too much noise when using

Rear side

the speaker input terminals, turn the

gain control to higher level.

3 LPF (low-pass filter) cut off frequency

control

You can select a cut off frequency from

GM-D9701

40 Hz to 240 Hz.

Front side

4 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.

For instruction of connecting the bass boost

remote control to the amplifier, see the Con-

Rear side

nection diagram.

Setting gain properly

! Protective function included to prevent

To adjust the switch, use a flathead screwdri-

malfunction of the unit and/or speakers

ver if needed.

due to excessive output, improper use or

improper connection.

1 POWER/PROTECT indicator

! When outputting high volume sound etc.,

The power indicator lights up to indicate

this function cuts off the output for a few

power ON.

seconds as a normal function, but output

! If something is not normal, the indicator

is restored when the volume of the head

turns red.

unit is turned down.

2 GAIN (gain) control

If the output remains low, even when the car

stereo volume is turned up, turn the con-

trols to a lower level. If distortion occurs

Setting the unit

! A cut in sound output may indicate impro-

Signal waveform when outputting at

per setting of the gain control. To ensure

high volume using amplifier gain

continuous sound output with the head

control

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

If the signal waveform is distorted due to high

authorized Pioneer Service Station.

output, even if the amplifier gain is raised, the

output power will change only slightly.

Gain control of this unit

Preout level: 2 V (Standard: 500 mV)

Preout level: 4 V

Above illustration shows NORMAL gain set-

ting.

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.

Connecting the units

Connection diagram

7 Car stereo with RCA output jacks (sold sepa-

rately)

8 External output

9 Connecting wire with RCA pin plugs (sold se-

parately)

a Amplifier with RCA input jacks (sold sepa-

rately)

b Bass boost level remote control

c Bass boost level remote control wire (5 m)

d RCA input jack

e RCA output jack

f System remote control wire (sold separately)

Connect male terminal of this wire to the sys-

tem 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 term-

inal via the ignition switch.

g Speaker output terminals

Please see the following section for speaker

connection instructions. Refer to Connections

when using the speaker input wire.

1 Battery wire (sold separately)

h Fuse 40 A × 2 (GM-D8701) / 40 A × 3 (GM-

! The maximum length of the wire be-

D9701)

tween the fuse and the positive + term-

i Front side

inal of the battery is 30 cm.

j Rear side

! For the wire size, refer to Connecting the

power terminal. The battery wire, the

ground wire and the optional direct

Before connecting the

ground wire must be same size. After

amplifier

making all other connections at the am-

plifier, connect the battery wire terminal

WARNING

of the amplifier to the positive + term-

! Secure the wiring with cable clamps or adhe-

inal of the battery.

sive tape. To protect the wiring, wrap sections

2 Fuse 100 A (GM-D8701) / 150 A (GM-D9701)

in contact with metal parts in adhesive tape.

(sold separately)

! Never cut the insulation of the power supply

Each amplifier must be separately fused at

to feed power to other equipment. Current ca-

100 A (GM-D8701) / 150 A (GM-D9701).

pacity of the wire is limited.

3 Positive + terminal

4 Negative (*) terminal

CAUTION

5 Battery (sold separately)

! Never shorten any wires, the protection circuit

6 Ground wire, Terminal (sold separately)

The ground wires must be same size as the

may malfunction.

battery wire.

! Never wire the speaker negative cable directly

Connect to metal body or chassis.

to ground.

Connecting the units

! Never band together multiple speaker's nega-

When connecting to one speaker

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 re-

main 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 am-

plifier as far away as possible from the anten-

na, antenna cable and tuner.

Speaker output

When connecting to two speakers

The output from two speakers is the same as

Connecting the speakers

that of one speaker.

This amplifier can be connected to two speak-

ers in parallel. Connect the speaker leads to

suit the mode according to the figure shown

below.

Precautions for parallel connection

! When wiring two speakers in parallel, make

sure that the synthetic impedance is from

1 W to 8 W to prevent the amplifier from

catching fire, generating smoke and/or

being damaged.

! When connected in parallel with the syn-

thetic impedance less than 1 W, as a nor-

mal function, this amplifier may

automatically be set on mute if outputting

Speaker output

high volume sound. Turn down the volume

until the mute function is canceled.