User Manual for Infinity Reference 1200D Subwoofer

Quick guide for the Infinity Reference 1200D subwoofer. Includes installation tips, wiring diagrams, safety warnings, and technical specifications.

Table of contents

Quick guide from the manual

This manual provides essential installation and safety information for the Infinity Reference 1200D subwoofer. Due to the complexity of automotive audio installation, professional installation is strongly recommended to ensure optimal performance and vehicle safety.

Warning: Playing loud music in an automobile can permanently damage your hearing and hinder your ability to hear traffic. Always listen at low levels while driving.

Installation Tips

Before beginning the installation, ensure you have the necessary tools and experience. If not, consult an authorized Infinity car audio dealer.

Always wear protective eyewear when using tools.
Turn off all audio components and electrical devices before starting.
Disconnect the negative (-) lead from your vehicle's battery.
Check clearances on both sides of the planned mounting surface to ensure screws or wires do not puncture brake lines, fuel lines, or wiring harnesses.
Use a utility knife to remove fabric or vinyl before drilling or cutting to prevent snagging.
Do not mount speakers where they will get wet.

Choosing a Mounting Location

Select a location that does not interfere with cargo, fold-down rear seats, or the trunk lid. The best location is typically a corner of the trunk or cargo area. Securely mount the enclosure to the surface.

Speaker Connections

Connect the + and - terminals on the enclosure to the amplifier's outputs, ensuring proper polarity is observed. Use at least 5mm² (10 AWG) speaker wire for these connections.

Wiring diagram for connecting the subwoofer to the amplifier.

Specifications

Subwoofer: 2x 12" (300mm) Polypropylene Driver
Power Handling: 800W RMS, 1600W peak
Sensitivity: 89dB (1W/1m)
Frequency Response: 30Hz – 400Hz
Nominal Impedance: 2 ohms
Voice Coil Diameter: 2" (50mm)
Enclosure Dimensions: 357.8mm D1 x 434.2mm D2 x 815mm W x 383mm H

General Care

Clean the loudspeaker with a damp cloth. Do not use any cleaners or solvents. This product is designed for mobile applications and is not intended for connection to the mains.

Practical help

Common problems

Poor sound quality or no sound

Check amplifier connections and ensure proper polarity (+/-) is observed.

Hearing damage

Avoid high volume levels while driving to maintain awareness of traffic.

Installation interference

Check for brake lines, fuel lines, or wiring harnesses before drilling or cutting.

Before use

Disconnect the negative (-) lead from the vehicle battery.
Wear protective eyewear.
Check for obstructions (brake/fuel lines) before drilling.
Ensure amplifier is powered off.
Verify wire gauge (at least 10 AWG).

Specs in practice

Power Handling: 800W RMS / 1600W peak power capacity.
Nominal Impedance: 2 ohms.
Frequency Response: 30Hz – 400Hz.

Images and diagrams

Wiring Diagram: Shows connection from Head Unit to Amplifier, and Amplifier Speaker Out to the Subwoofer terminals.

Model compatibility

Designed for mobile applications only.
Not intended for connection to mains power.

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Manual page author

David Miller

Documentation analyst

Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.