GM-D7400M - Receiver PIONEER - Free user manual and instructions

USER MANUAL GM-D7400M PIONEER

CLASS D MONO AMPLIFIER

AMPLIFICATEUR MONO DE CLASSE D

Contents Before Using This

Before Using This Product .... 1

Visit our website 1

In case of trouble 2

About This Product 2

CAUTION 2

WARNING 2

Setting the Unit 3

Gain Control 3

LPF (Low-Pass-Filter) Cut Off Frequency Control 4

Power Indicator (Blue) 4

BFC (Beat Frequency Control) Switch 4

Input Switch 4

Bass Boost Control 4

Setting the Gain properly 5

Connecting the Unit 6

Connection Diagram 7

Solderless Terminal Connections 8

Connecting the Power Terminal 8

Connecting the Speaker Output Terminals ..... 9

Using the Speaker Input 9

Connecting the Speaker Wires 9

Installation 10

Example of installation on the floor mat or on the chassis 11

Specifications 12

oduct

Thank you for purchasing this PIONEER product. Before attempting operation, be sure to read this manual.

If you want to dispose this product, do not mix it with general household waste. There is a separate collection system for used electronic products in accordance with legislation that requires proper treatment, recovery and recycling.

Private households in the member states of the EU, in Switzerland and Norway may return their used electronic products free of charge to designated collection facilities or to a retailer (if you purchase a similar new one).

For countries not mentioned above, please contact your local authorities for the correct method of disposal.

By doing so you will ensure that your disposed product undergoes the necessary treatment, recovery and recycling and thus prevent potential negative effects on the environment and human health.

Visit our website

Visit us at the following site:

http://www.pioneer.co.uk

• Register your product. We will keep the details of your purchase on file to help you refer to this information in the event of an insurance claim such as loss or theft.
  • We offer the latest information about Pioneer Corporation on our website.

In case of trouble

When the unit does not operate properly, contact your dealer or the nearest authorized PIONEER Service Station.

About This Product

This product is a class D amplifier for the subwoofer. If both L (left) and R (right) channels are connected to the RCA input of this product, output is mixed because this product is a mono amplifier.

CAUTION

• Never replace the fuse with one of greater value or rating than the original fuse. Use of an improper fuse could result in overheating and smoke and could cause damage to the product and injury including burns.
• Use the supplied hexagonal wrench to tighten screws when fastening wires to the terminal. The use of a long, commercially available hexagonal wrench can cause excessive torque to be applied possibly resulting in damage to terminals and wires.

WARNING

• We recommend that you use the special red battery and ground wire [RD-228], 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 subwoofer 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 subwoofer, 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 subwoofer. 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.
• DO NOT allow amplifier to come into contact with liquids due to, for example, the location where the amplifier is installed. Electrical shock could result. Also, amplifier and speaker damage, smoke, and overheating could result from contact with liquids. In addition, the amplifier surface and the surface of any attached speakers could become hot to the touch and minor burns could result.

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 clockwise. If the sound distorts when the volume is turned up, turn the gain control counterclockwise.

- 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.

Technical diagram of a device with labeled ports and an inset showing a close-up view of the component.

LPF (Low-Pass-Filter) Cut Off Frequency Control

You can select a cut off frequency from 40 Hz to 240 Hz.

Power Indicator (Blue)

The power indicator lights when the power is switched on.

BFC (Beat Frequency Control) Switch

If you hear a beat while listening to an MW/LW broadcast with your car stereo, change the BFC switch using a small standard tip screwdriver.

Input Switch

It is possible to input from a car stereo external output or a car stereo speaker output. Switch the input switch before turning on the power. Since switching the input switch while the power is on can cause a loud noise to be emitted from the speakers, the power is turned off by a protection function. When using an external output, slide the switch to the right (RCA). For connection instructions, see the “Connection Diagram” section. When using a speaker output, slide the switch to the left (SP). In this case, it is necessary to use the supplied speaker input wire with RCA pin cord. For details, see the “Using the Speaker Input” section.

Bass Boost Control

You can select a bass boost level from 0 dB, 6 dB and 12 dB.

Setting the Gain properly

• This unit is equipped with a protective function to prevent malfunction of the unit itself and speakers from too much output, improper use or improper connection.
• When outputting sound at high volume etc., this function will cut off the sound output in a few seconds. But this is not a malfunction. When you turn down the volume of the head unit the sound output will be restored.
• If sound output is cut, the gain control of this unit may be improperly set. To ensure continuous sound output at increased volume of the head unit, set the gain control of the amplifier to a proper position according to the preout maximum output level of the head unit.

Gain Control of This Unit

Preout level: 2 V (Standard: 500 mV)

Preout level: 4 V

Preout level: 6.5 V

GAIN NORMAL 6.5V 0.2V

• The above illustration shows the gain set to NORMAL.

There is no need to decrease the volume of the head unit and too much output is controlled.

Relationship between the gain of the amplifier and the output power of the head unit

graph LR
    A["Power"] --> B["Normal gain"]
    B --> C["Equal power"]
    C --> D["Power"]
    D --> E["Maximum gain"]
    E --> F["Amplifier gain (maximum)"]
    F --> G["Head unit volume steps"]
    G --> H["Amplifier gain (normal)"]
    H --> I["Head unit volume steps"]
    I --> J["Amplifier gain (normal)"]

- If you raise the gain of the amplifier to an improper level, only distortion is increased and the power increases only slightly.

Signal waveform when outputting at high volume by the gain control of the amplifier

Normal gain Signal waveform Amplifier gain (normal) Equal power Maximum gain Signal waveform Amplifier gain (maximum)

• With high output the signal waveform is distorted, if you raise the gain of the amplifier the power changes only slightly.
• If you decrease the volume of the head unit and set the gain control of the amplifier to the proper position but still the sound cuts out from time to time, contact the nearest authorized PIONEER Service Station.

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 moving parts of the vehicle, such as the gearshift, handbrake or seat sliding mechanism.

- Do not shorten any wires. Otherwise the protection 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.

- Never replace the fuse with one of greater value or rating than the original fuse. Use of an improper fuse could result in overheating and smoke and could cause damage to the product and injury including burns.

CAUTION:

To prevent damage and/or injury

- Do not ground the speaker wire directly or connect 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 recreational 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.

- DO NOT connect a subwoofer with a lower impedance than specified in the “Connecting the Speaker Wires” section. Amplifier damage, smoke, and overheating could result from a non-specified connection. The amplifier surface could also become hot to the touch and minor burns could result.

- Connect either of two subwoofers to the amplifier; 1: a subwoofer with a 250 W or larger nominal input and an impedance 4 Ω, or 2: a subwoofer with a 420 W or larger nominal input and an impedance 2 Ω. If the nominal input and impedance are out of the above ranges, the subwoofer may catch fire, emit smoke or become damaged.

• 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.

Connection Diagram

- This diagram shows connections using external output (subwoofer output). Slide the input switch to the right (RCA).

graph TD
    A["Grommet"] --> B["Fuse (40 A) × 2"]
    B --> C["Special red battery wire [RD-228"] (sold separately)]
    C --> D["After making all other connections at the amplifier, connect the battery wire terminal of the amplifier to the positive (+) terminal of the battery."]
    E["Ground wire (black) [RD-228"] (sold separately)] --> F["Connect to metal body or chassis."]
    G["Connecting wire with RCA pin plugs (sold separately)."] --> H["External Output (Subwoofer output)"]
    H --> I["RCA input jack"]
    I --> J["Speaker terminal"]
    J --> K["See the “Connecting the Speaker Wires” section for speaker connection instructions."]
    L["Fuse (25 A) × 2"] --> M["Reverse side"]
    M --> N["Speaker terminal"]

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.

Solderless Terminal Connections

• Do not connect a cord having an exposed core wire to the power terminals of this amplifier (Power terminal, GND terminal, System remote control terminal). Disconnection or breakage of the core wire can cause a fire or short-circuit.
• 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.
• Fasten while making sure to not to clamp the insulating sheath of the wire.
• Use the supplied hexagonal wrench to tighten and loosen the terminal screw of the amplifier. Securely fasten the wire with the terminal screw. However, since excessively tightening the terminal screw of the System remote control has the risk of damaging the wire, be careful not to tighten excessively by observing the status of the wire when tightening.

Connecting the Power Terminal

• We recommend that you use the special red battery and ground wire [RD-228], 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 and the ground wire must be same size.
• Use a 10 AWG to 20 AWG wire for the system remote control wire.

Battery Wire and Ground Wire Size

Wire Length	less than less than less than 5.7 m 9.0 m 14.4 m
Wire Size 8 AWG 6 AWG 4 AWG

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.

Positive (+) terminal Fuse (40 A) × 2 Engine compartment Interior of the vehicle Insert the O-ring rubber grommet into the vehicle body. Drill a 13 mm hole into the vehicle body.

2. Connect the wires to the terminal.

- Fix the wires securely with the terminal screws.

System remote control terminal Power terminal Terminal screws GND terminal Ground wire Battery wire System remote control wire

WARNING

Failure to securely fasten the battery wire to the terminal using the terminal screws could cause the terminal area to overheat and could result in damage and injury including minor burns.

Connecting the Speaker Output Terminals

- Use a 10 AWG to 16 AWG wire for the speaker wire.

1. Expose the end of the speaker wires using nippers or a cutter by about 10 mm to 12 mm.

Pure technical diagram of a mechanical component with no text or symbols

10 mm to 12 mm

1. Connect the speaker wires to the speaker output terminals.

- Fix the speaker wires securely with the terminal screws.

Terminal screws Speaker output terminal Speaker wire

Using the Speaker Input

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

- Slide the input switch to the left (SP).

■Connections when using the speaker input

graph TD
    A["Car Stereo"] --> B["Speaker output"]
    A --> C["White: Black: Black: Red: Left ⊕ Left ⊖ Right ⊖ Right ⊕"]
    A --> D["Speaker input wire with RCA pin cord"]

To RCA input jack of this unit.

Connecting the Speaker Wires

Connect the speaker leads according to the figures shown below.

Diagram of a device rear panel with labeled ports and connections, including speaker output and indicator lights.

Subwoofer

CAUTION

- Do not install in:

—Places where it could injure the driver or passengers 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-circuit.

- 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.

- DO NOT allow amplifier to come into contact with liquids due to, for example, the location where the amplifier is installed. Electrical shock could result. Also, amplifier and speaker damage, smoke, and overheating could result from contact with liquids. In addition, the amplifier surface and the surface of any attached speakers could become hot to the touch and minor burns could result.

• 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.

- Never replace the fuse with one of greater value or rating than the original fuse. Use of an improper fuse could result in overheating and smoke and could cause damage to the product and injury including burns.

CAUTION:

To prevent malfunction and/or injury

• 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 allow amplifier to come into contact with liquids due to, for example, the location where the amplifier is installed. Electrical shock could result. Also, amplifier and speaker damage, smoke, and overheating could result from contact with liquids. In addition, the amplifier surface and the surface of any attached speakers could become hot to the touch and minor burns could result.

- 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 mm × 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 amplifier, either on the carpet or directly to the chassis.

Tapping screw (4 mm × 30 mm) — Floor mat or chassis

Drill a 2.5 mm diameter hole

Specifications

Power source 14.4 V DC (10.8 V to 15.1 V allowable)

Grounding system ...... Negative type

Current consumption 17.0 A (at continuous power, 4 Ω)

Average current drawn* 5.0 A (4 Ω for one channel)

10.0 A (2 Ω for one channel)

Fuse 25 A × 2

Dimensions 225 mm (W) × 56 mm (H) × 200 mm (D)

(Terminals not included)

Weight 2.6 kg (Leads for wiring not included)

Maximum power output 400 W × 1 (4 Ω) / 800 W × 1 (2 Ω)

Continuous power (14.4 V) 4 Ω, 20 Hz to 240 Hz, ≤ 1.0 % THD, 200 W × 1

2, 50Hz, ≤ 1.0% THD, 400W × 1

Load impedance 4 Ω (2 Ω to 8 Ω allowable)

Frequency response 10 Hz to 240 Hz (+0 dB, -3 dB)

Signal-to-noise ratio 80 dB (IEC-A network)

Distortion 0.3% (10 W, 100 Hz)

Low pass filter Cut off frequency: 40 Hz to 240 Hz

Cut off slope: -12 dB/oct

Bass Boost ...... Frequency: 50 Hz

Level: 0 dB / 6 dB / 12 dB

Gain control .... RCA: 200 mV to 6.5 V

Speaker: 0.8 V to 26 V

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

Speaker: 26 V / 90 kΩ

Note:

- Specifications and the design are subject to possible modification without notice due to improvements.

\*Average current drawn

- The average current drawn is nearly the maximum current drawn by this unit when an audio signal is input. Use this value when working out total current drawn by multiple power amplifiers.

Technical diagram of a TONTE device with labeled ports and internal components, showing assembly steps and component labels.

Diagram of a device rear panel with labeled ports and connections, showing internal components and signal output.

Altavoz de subgraves

PRECAUCION

- No lo instale en:

Technical diagram of a device with labeled ports and a highlighted component, showing assembly steps and connection details.

Pure diagram of a cable or wire with a shaded section and dimension line (no text or symbols)

10 mm bis 12 mm

Diagram of a device rear panel with labeled ports and connections, including indicator lights and speaker output

Subwoofer

VORSICHT

2 Ω, 50 Hz, ≤ 1,0 % THD, 400 W × 1

Technical diagram of a device with labeled ports and a central display panel, showing internal components and assembly steps.

Diagram of a device rear panel with labeled ports and connection points, showing connections to speaker output.

Technical diagram of a Tonic device with labeled ports and an inset showing a close-up view of the component.

Simple line drawing of a cylindrical object with a shaded section and a double-headed arrow indicating width (no text or symbols)

Diagram of a device rear panel with labeled ports and connections, including speaker output and indicator lights.

Subwoofer

PRECAUZIONE

Technical diagram of a device with labeled ports and a highlighted component, showing assembly steps and component labels.

Pure technical diagram of a mechanical component with no text or symbols

10 mm tot 12 mm

Diagram of a device rear panel with labeled ports and connections, including indicator lights and speaker output

Subwoofer

WAARSCHUWING

Technical diagram of a device with labeled ports and an inset showing a close-up view of the component.

Diagram of a device rear panel with labeled ports and connectors, showing internal components and connection points.

Pure diagram of a cable or wire with a shaded section and dimension line (no text or symbols)

от 10 мм до 12 мм

Diagram of a device rear panel with labeled ports and connections, showing signal and audio interface elements.

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

TEL: [phone]

PIONEER ELECTRONICS ASIACENTRE PTE. LTD.

253 Alexandra Road, #04-01, Singapore 159936

TEL: [phone]

PIONEER ELECTRONICS AUSTRALIA PTY. LTD.

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

TEL: [phone]

PIONEER ELECTRONICS OF CANADA, INC.

300 Allstate Parkway, Markham, Ontario L3R 0P2, Canada

TEL: [phone]

TEL: [phone]

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: [phone]

Published by Pioneer Corporation.

Copyright © 2007 by Pioneer Corporation.

All rights reserved.

Publication de Pioneer Corporation.

Copyright © 2007 Pioneer Corporation.