Pioneer GM-X942 Owner's Manual
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Brand: Pioneer
Category: Amplifier , Car Stereo System
Type: Owner's manual
Model: Pioneer GM-X742 , Pioneer GM-X942
Pages: 8
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Thank you for purchasing this PIONEER
product. It is designed to give you many
years of enjoyment.
PIONEER SUGGESTS USING A PRO-
FESSIONAL INSTALLER DUE TO THE
COMPLEXITY OF THIS PRODUCT.
Please read all instructions and
WARN-
INGS in this manual before attempting
operation. Should you have any questions,
contact your nearest Pioneer authorized
dealer or installation specialist.
Important
The serial number of this amplifier is writ-
ten on the bottom of the unit. For your own
security and convenience, write it down on
the enclosed warranty card. Keep the card
handy for future reference.
Composition of Manual
This manual applies to the GM-X942 and
GM-X742. However, the illustrations show
the GM-X942.
WARNING
• Always use the special red battery and ground
wire [RD-223], which is 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
After-sales service for Pioneer
products
Please contact the dealer or distributor from where
you purchased the product for its after-sales ser-
vice (including warranty conditions) or any other
information. In case the necessary information is
not available, please contact the companies listed
below:
Please do not ship your product to the companies
at the addresses listed below for repair without
advance contact.
7 U.S.A.
Pioneer Electronics Service, Inc.
CUSTOMER SERVICE DEPARTMENT
P.O. Box 1760
Long Beach, CA 90801
800-421-1404
7 CANADA
Pioneer Electronics of Canada, Inc.
CUSTOMER SERVICE DEPARTMENT
300 Allstate Parkway
Markham, Ontario L3R 0P2
(905) 479-4411
1-877-283-5901
For warranty information please see the Limited
Warranty sheet included with your product.
PIONEER CORPORATION
4-1, MEGURO 1-CHOME, MEGURO-KU, TOKYO 153-8654, JAPAN
PIONEER ELECTRONICS (USA) INC.
P.O. Box 1760, Long Beach, California 90801, U.S.A.
TEL: (800) 421-1404
PIONEER ELECTRONIC (EUROPE) N.V.
Haven 1087 Keetberglaan 1, 9120 Melsele, Belgium
TEL: (0) 3/570.05.11
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 0P2, Canada
TEL: (905) 479-4411
PIONEER ELECTRONICS DE MEXICO, S.A. de C.V.
San Lorenzo Num 1009 3er piso Desp. 302
Col. Del Valle, Mexico D.F. C.P. 03100
TEL: 5-688-52-90
Published by Pioneer Corporation.
Copyright © 1999 by Pioneer Corporation.
All rights reserved.
Publication de Pioneer Corporation.
Copyright © 1999 Pioneer Corporation.
Tous droits de reproduction et de traduction
réservés.
Printed in U.S.A.
Imprimé aux Etats-Unis
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BRIDGEABLE POWER AMPLIFIER
AMPLIFICATEUR DE PUISSANCE
PONTABLE
Owner’s Manual
GM-X942
GM-X742
Mode d’emploi
Setting the Unit
Gain Control
If the sound level is too low, even when
the volume of the car stereo used along
with this power amplifier is turned up,
turn gain control on the front of the
power amplifier clockwise. If the sound
distorts when the volume is turned up,
turn the gain control counter-clockwise.
• 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.
Power Indicator
The power indicator lights when the
power is switched on.
Bass Boost Level Control
Bass boost level control can boost the
level around the frequency selected by
the bass boost frequency control from 0
to 18 dB.
Cut Off Frequency Control
If the LPF/HPF select switch is set to
LPF (or HPF), you can select a cut off
frequency from 40 to 120 Hz.
Bass Boost Frequency Control
You can select a bass boost frequency
from 40 to 120 Hz with the bass boost
control.
• Bass Boost Level Control and Bass Boost
Frequency Control can be adjusted only
when the LPF/HPF select switch is set to a
position other than HPF.
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows according to the type of speaker
that is connected to the speaker output connector and the car stereo system:
LPF/HPF Select Audio frequency range Speaker Remarks
Switch to be output Type
LPF (left) * — 40 to 120 Hz Subwoofer Connect a subwoofer.
OFF (center) Full range Full range
HPF (right) * 40 to 120 Hz — Full range Use if you want to cut the
very-low-frequency range*
because it is not necessary
for the speakers you are
using.
* See the “Cut Off Frequency Control” section.