Garage
Shop

See all parts that fit your 2003 Excursion

Infinity 611A R/B

456W RMS Class D Monoblock Amplifier

Infinity
Shop all Infinity
Product videos
highlight-star-icon

Infinity Systems 1-Channel Class D Car Amplifier • 450W x 1 chan. @ 4 ohm • 650W x 1 chan. Max • Tuned Bass EQ (0-12 dB bass boost at 20-80 Hz) • Preamp RCA outputs

Learn more about the LS-611a-RB

We apologize

This item has been discontinued

Product Highlights


Infinity Systems 1-Channel Class D Car Amplifier • 450W x 1 chan. @ 4 ohm • 650W x 1 chan. Max • Tuned Bass EQ (0-12 dB bass boost at 20-80 Hz) • Preamp RCA outputs

Description


Infinity brand icon

Authorized dealer

Item Condition - Refurbished:

A manufacturer refurbished product will function like new with all parts inspected or replaced as necessary. There may be slight cosmetic issues such as scratches or similar. See the description for additional details.

  • Infinity Systems 1-Channel Class D Car Amplifier
  • RMS Power Rating:
    • 4 ohm: 450 watts x 1 chan.
    • 2 ohm: 657 watts x 1 chan.
  • LED power indicators
  • Tuned Bass EQ (0-12 dB bass boost at 20-80 Hz)
  • Dynamic Bass Optimization (DBO) circuit
  • Single channel operation
  • Preamp RCA outputs
  • Variable low-pass filter (32-320 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Dimensions: 15-7/8" L x 12-1/8" W x 2-11/16" H
  • 4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • 90-day Manufacturer's warranty
  • Item Condition: Refurbished

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
450 watts x 1 channel
RMS Power @ 2 ohms
657 watts x 1 channel
Amplifier Specifications
Amplifier Class
D
Number of Channels
1 - Mono
Total RMS Power Output
657 watts
Minimum Impedance Unbridged
2 ohm
Minimum Impedance Bridged
Not Bridgeable
THD at Rated RMS Power
1%
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
Low-Pass Crossover Frequency
32 - 320 Hz
Signal-to-Noise Ratio
70 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
No
Fuse Rating
30A x 2 
Warranty and Return Policy
Parts Warranty Duration
90 days
Labor Warranty Duration
90 days
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

611A-RB

Weight:

14.00lbs

Internal SKU:

LS-611a-RB

Internal Product ID:

28241

Product and How-to Videos


  • Harman International: The Pursuit of Great Sound
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews


Infinity 611A R/B thumbnail image

5 star
0%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:

Loading...
Sorry, no reviews found


RM-RK130 small

JVC Arsenal RM-RK130

Wired Remote Control for JVC Monoblock Amplifiers (KS-AR8001D / 7001 / 7501D)

(1)

$16.99

List price $34.99

E1200 small

JL Audio e1200

MonoBlock Amplifier

(4)

$149.99

List price $399.99

No picture

Phoenix Gold Ryval V754 R/B

(Factory Refurbished) 1000W Max, 4-Channel Amplifier (Rival)

(2)

$69.99

List price $269.99

05CK4 small

Kicker CK4

Complete 4 Gauge 2-Channel Amplifier Installation Kit 05CK4

(32)

$91.99

List price $149.99

MPE100 small

MA Audio MPE100

4-Band Parametric Equalizer

(1)

$59.99

List price $149.99

E1800D small

JL Audio e1800D

Class D Monoblock Amplifier

(4)

$379.99

List price $499.99

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

2003 Ford Excursion

2002 Ford Explorer

2004 Ford Explorer

2002 Mitsubishi Eclipse

2020 Kia Stinger

2015 MINI Cooper

2002 Ford Windstar

2008 Mitsubishi Eclipse

2008 MINI Cooper

2003 Ford Focus

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.