Infinity REF-704a, REF-4555a, REF-551a, REFERENCE REF-704a, REFERENCE REF-4555a Owner's Manual

INFINITY REFERENCE

REF-704a/REF-4555a/REF-551a AMPLIFIER

EN

OWNER’S MANUAL

THANK YOU FOR YOUR PURCHASE . . .

Your Infinity product has been designed to provide you with the performance and ease of operation you would expect from Infinity.

• Please take time to read your owner's manual in its entirety before operating or installing your amplifier.

• Keep the owner's manual for your amplifier in your glove compartment along with the owner's manual for your car.

• Put your amplifier sales receipt with other important documents in order to expedite warranty service if needed.

ABOUT THE MANUAL

This manual describes general installation guidelines and operation instructions. However, please note that proper installation of
mobile audio and video components requires qualified experience with mechanical and electrical procedures. If you do not have the
knowledge and tools to successfully perform this installation, we strongly recommend consulting an authorized Infinity dealer about
your installation options. Keep all instructions and sales receipts for reference. Consider this manual as an indispensable feature
of your amplifier.

INFINITY REFERENCE

TABLE OF CONTENTS

CHAPTER 1: PICTORIAL INDEX OF INPUT CONNECTIONS ....................................................................................................... 01

CHAPTER 2: INSTALLATION AND WIRING ....................................................................................................... 02

What's in the box ....................................................................................................... 02

Precautions ....................................................................................................... 02

1. Power indicator ....................................................................................................... 03

2. Protect indicator ....................................................................................................... 03

3. Speaker output connectors ....................................................................................................... 03

4. Fuses ....................................................................................................... 06

5. Power input connectors ....................................................................................................... 06

6. Front and rear inputs and outputs (RCA) ....................................................................................................... 07

7. Input level ....................................................................................................... 08

8. Crossover filter selectors ....................................................................................................... 08

9. Gain ....................................................................................................... 08

10. Crossover frequency controls ....................................................................................................... 09

11. HALOsonic input ....................................................................................................... 09

12. ADAS Assign (REF-704a and REF-4555a) ....................................................................................................... 09

13. ADAS Input (REF-704a and REF-4555a) ....................................................................................................... 09

CHAPTER 3: OPERATIONS ....................................................................................................... 10

CHAPTER 4: TROUBLESHOOTING ....................................................................................................... 11

CHAPTER 5: SPECIFICATIONS ....................................................................................................... 12

CHAPTER 1: PICTORIAL INDEX OF INPUT CONNECTIONS

REF Amplifier top panel

1

2

REF Amplifier front panel

POWE R

PROTEC T

REF Amplifier back panel

1

3

7

4 5

9

11

6 8 10 12 13

INFINITY REFERENCE

CHAPTER 2: INSTALLATION AND WIRING

What's in the box:

1 amplifier
2 spare fuses (x3 with REF-4555a)
4 RCA adapters (x2 with REF-551a)
Quick-start guide

Precautions:

IMPORTANT: Disconnect the vehicle’s negative (–) battery terminal before beginning the installation.

• Always wear protective eyewear when using tools.

• Choose a safe mounting location, away from moisture. Check clearances on both sides of a planned mounting surface. Be sure that
screws or wires will not puncture brake lines, fuel lines, or wiring harnesses and that wire routing will not interfere with the safe
vehicle operation. Use caution when drilling or cutting in the mounting area.

• When making electrical connections, make sure they are secure and properly insulated.

• If you must replace any of the amplifier’s fuses, use the same type of fuse and current rating as the original.

• To keep the amplifier cool, choose a location that provides enough air circulation, such as under a seat or in the trunk.

• Do not mount the amplifier with the heat sink facing downward, as this interferes with cooling.

• Mount the amplifier so that it will not be damaged by the feet of backseat passengers or shifting cargo in the trunk, and so that it
remains dry.

• Using the amplifier as a template, mark the locations of the holes on the mounting surface.

• Drill pilot holes in the mounting surface.

• Attach the amplifier to the mounting surface with four appropriate mounting screws (not included). Recommended: #8 Phillips-head
sheet metal screws.

NOTE: You may find it more convenient to make all of the connections to the amplifier before you permanently mount it.

POWER

PROTEC T

2