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USER MANUAL PRSD220 PIONEER
Contents Before Using This
Before Using This Product .... 1
Visit our website 1
In case of trouble 1
CAUTION 2
CAUTION 2
WARNING 2
Setting the Unit 3
Power Indicator 3
Top Cover 3
Bass Boost Control 3
BFC (Beat Frequency Control) Switch 3
Cut Off Frequency Control 4
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch 4
Gain Control 4
Input Switch 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 10
Installation 11
Attaching the Bass boost remote control ..... 11
Example of installation on the floor mat or on the chassis 12
Replacing the top cover 12
Specifications 13
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.

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.

CAUTION
Diagram A - Proper

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8 + Ohm Speaker 8 + Ohm Speaker L+ R- Pioneer Amplifier4 Ohm Bridged Mode
Diagram B - Improper

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4 + Ohm - Speaker 4 + Ohm - Speaker L+ R- Pioneer Amplifier2 Ohm Bridged Mode
Do NOT install or use your Pioneer amplifier by wiring speakers rated at 4 Ohm (or lower) in parallel to achieve a 2 Ohm (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 for a two-channel amplifier and achieve a 4 Ω load, wire two 8 Ω speakers in parallel with Left + and Right – (Diagram A) or use a single 4 Ω speaker. For a four-channel amplifier, follow the speaker output connection diagram for bridging as shown on the back of your amplifier, and wire two 8 Ω speakers in parallel to achieve a 4 Ω load or use a single 4 Ω speaker per channel.
If you have any questions or concerns, please contact your local authorized
Pioneer dealer or call Pioneer customer service.
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 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.
• C 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.
- C onfirm 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
- T o adjust the switch, use standard tip screwdriver if needed.

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Power Indicator The power indicator lights when the power is switched on. Top Cover Before setting up the unit, unfasten the screws with a 4 mm hexagonal wrench and remove the top cover. Bass Boost Control You can select a bass boost level from 0, 6, 9 and 12 dB. For instruction of connecting the bass boost remote control to the amplifier, see the "Connection Diagram" section. BFC (Beat Frequency Control) Switch BFC switch is on the bottom of the unit. 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.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 Hz to 500 Hz.
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 Hz to 500 Hz Subwoofer Connect a subwoofer.
OFF (Center) Full range Full range
HPF (Right) * 40 Hz to 500 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.
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 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.
- If you hear too much noise when using the speaker input terminals, turn the gain control counter-clockwise.
Input Switch
It is possible to input from a car stereo external output (subwoofer output) or a car stereo speaker output. When using an external output (subwoofer output), slide the switch to the left. For connection instructions, see the “Connection Diagram” section. When using a speaker output, slide the switch to the right. 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.
Setting the Gain properly
- T his 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. There is no need to decrease the volume of the head unit and too much output is controlled.
- 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.
Gain Control of This Unit

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GAIN Normal Preout level: 4 V Preout level: 6.5 V 6.5V 0.4V Preout level: 2 V (Standard: 500 mV)- T he above illustration shows the gain set to NORMAL.
Relationship between the gain of the amplifier and the output power of the head unit

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

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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.

CAUTION
- D isconnect 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.
- D o not shorten any wires. Otherwise the protection circuit may fail to work when it should.
- N ever 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.
- N ever 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
- D o not ground the speaker wire directly or connect a negative (−) lead wire for several speakers.
- T his 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.
-
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 2 to 8 ohms for stereo connection, and 4 to 8 ohms for monaural and other bridge connection.
• 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.
Speaker Channel Speaker Type Power
| Two-channel | Subwoofer Nominal input: Min. 150 W |
| Other than subwoofer Max. input: Min. 300 W | |
| One-channel | Subwoofer Nominal input: Min. 600 W |
| Other than subwoofer Max. input: Min. 1 200 W |
Connection Diagram
- This diagram shows connections using external output (subwoofer output). Slide the input switch to the left.
- When you connect with speaker output, connections defer from the diagram. For details, see the “Using the Speaker Input” section. In either case, you need to set the input switch. For details, see the “Setting the Unit” section.

flowchart
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."]
B --> E["Ground wire (black) [RD-228"] (sold separately)]
E --> F["Connect to metal body or chassis."]
G["Bass Boost Remote Control Wire"] --> H["6 m"]
H --> I["Car stereo with RCA output jacks"]
I --> J["External Output"]
J --> K["Connecting wire with RCA pin plugs (sold separately)."]
L["Fuse (30 A)"] --> M["Speaker output terminal"]
M --> N["See the “Connecting the Speaker Wires” section for speaker connection instructions."]
O["RCA input jack"] --> P["RCA output jack"]
Q["Amplifier with RCA input jacks"] --> R["RCA input"]
S["System remote control wire (sold separately)"] --> T["External Output"]
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.
- U se 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 4.5 m 7.2 m 11.4 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.

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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.

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System remote control terminal Power terminal Terminal screws GND terminal Ground wire Battery wire System remote control wireWARNING
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
- U se a 10 AWG to 16 AWG wire for the speaker wire.
- Expose the end of the speaker wires using nippers or a cutter by about 10 mm to 12 mm.

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10 mm to 12 mm- Connect the speaker wires to the speaker output terminals.
- Fix the speaker wires securely with the terminal screws.

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Terminal screws Speaker output terminal Speaker wireUsing the Speaker Input
Connect the car stereo speaker output wires to the amplifier using the supplied speaker input wire with RCA pin cord.
• S lide the input switch to the right (SP).
Connections when using the speaker input

flowchart
graph TD
A["Car Stereo"] --> B["Speaker output"]
B --> C["White: Black: Black: Red: Left ⊕ Left ⊖ Right ⊖ Right ⊕"]
C --> D["Speaker input wire with RCA pin cord"]
D --> E["To RCA input jack of this unit."]
- A s a result of connecting the car stereo speaker output wire to the amplifier, the power of the amplifier is turned on automatically when the car stereo is turned on. It is not necessary to connect the system remote control wire in this case.
- In the case the amplifier and head unit are connected using a speaker input wire with RCA pin cord, the amplifier power is only turned on when one amplifier is being used. If two or more amplifiers are synchronously connected in combination, connect the head unit and all of the amplifiers with the system remote control wire.
Note:
- C onnect the system remote control wire when the power of the amplifier is not to be turned on when the car stereo is turned on.
Connecting the Speaker Wires
The speaker output mode can be two-channel (stereo) or one-channel (mono). Connect the speaker leads to suit the mode according to the figures shown below.
• D o not connect both the RCA input and the speaker input at the same time.
Two-channel (stereo)

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(Right) Speaker (Left)One-channel (mono)

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Speaker (Mono)
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.
- C onfirm 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.
- N ever 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.
Attaching the Bass boost remote control
Attach with tapping screws (3 mm × 10 mm) at an easily accessible location such as under the dashboard.

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Technical line drawing of a mechanical component with mounting holes and a central shaft (no text or symbols)Tapping screw (3 mm × 10 mm)
Example of installation on the floor mat or on the chassis
- Place the amplifier where it is to be installed. Insert the supplied tapping screws (4 mm × 30 mm) into the screw holes. Push on the screws with a screwdriver so they make marks where the installation holes are to be located.
- Drill 2.5 mm diameter holes at the point marked, and install the amplifier, either on the carpet or directly to the chassis.
Replacing the top cover
- Align the unit and top cover, and insert the screw.
• T he cover can be installed in the desired direction to match to the amplifier.
- Tighten the screw with a 4 mm hexagonal wrench.

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Tapping-screws (4 mm × 30 mm) Screw Top Cover Drill a 2.5 mm diameter hole Floor mat or chassisSpecifications
Power source 14.4 V DC (10.8 V to 15.1 V allowable)
Grounding system ...... Negative type
Current consumption 25 A (at continuous power, 4 Ω)
Average current drawn* 8 A (4 Ω for two channels)
17 A (4 Ω for one channel)
17 A (2 Ω for two channel)
Fuse 30 A × 2
Dimensions 301 (W) mm × 57 (H) mm × 213 (D) mm
Weight 3.4 kg (Leads for wiring not included)
Maximum power output 300 W × 2 (4 Ω) / 1 200 W × 1 (4 Ω)
Continuous power output 150 W × 2 (at 14.4 V, 4 Ω, 20 Hz to 20 kHz 1.0% THD)
600W× 1 (at 14.4V,4 ,1kHz1.0% THD)
300W× 2 (at 14.4V,2 ,1kHz1.0% THD)
Load impedance 4 Ω (2 Ω to 8 Ω allowable)
Frequency response 10 Hz to 50 kHz (+0 dB, -3 dB)
Signal-to-noise ratio 100 dB (IEC-A network)
Distortion 0.005% (10 W, 1 kHz)
Separation 70 dB (1 kHz)
60 dB (100 Hz to 10 kHz)
Low pass filter Cut off frequency: 40 Hz to 500 Hz
Cut off slope: -12 dB/oct
High pass filter.... Cut off frequency: 40 Hz to 500 Hz
Cut off slope: -12 dB/oct
Bass boost ...... Frequency: 50 Hz
Level: 0, 6, 9, 12 dB
Gain control RCA: 400 mV to 6.5 V
Speaker: 1.6 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.
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Technical line drawing of a mechanical component with mounting holes and a central shaft (no text or symbols)Tornillo autorroscante (3 mm × 10 mm)
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Pure technical diagram of a mechanical component with dimension line (no text or symbols)10 mm bis 12 mm
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Technical line drawing of a mechanical component with mounting holes and a central cylindrical feature (no text or symbols)Pegel: 0, 6, 9, 12 dB
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Technical line drawing of a mechanical component with mounting holes and a central shaft (no text or symbols)Vis autotaraudeuse (3 mm × 10 mm)
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Pure diagram of a cable or wire with a shaded section and double-headed arrow indicating width (no text or symbols)natural_image
Technical line drawing of a mechanical component with mounting holes and a central cylindrical feature (no text or symbols)Vite autofilettante (3 mm × 10 mm)
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Pure technical diagram of a mechanical component with no text or symbols10 mm tot 12 mm
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Technical line drawing of a mechanical component with mounting holes and a central shaft (no text or symbols)Helling: 0, 6, 9, 12 dB
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Technical line drawing of a mechanical component with mounting holes and a central housing (no text or symbols)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: 65-6472-7555
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: 1-877-283-5901
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.
Copyright © 2008 by Pioneer Corporation.
All rights reserved.
Publication de Pioneer Corporation.
Copyright © 2008 Pioneer Corporation.