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Infinity Reference 475a R/B

(Factory Refurbished) 468W Max, Reference Series Class AB 4-Channel Amplifier (REF475A)

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Reference Series Class AB 4-Channel Amplifier • 75W x 4 chan. @ 4 ohms • 90W x 4 chan. @ 2 ohms • 117W x 4 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs

Learn more about the LS-475a-RB

We apologize

This item has been discontinued

Product Highlights


Reference Series Class AB 4-Channel Amplifier • 75W x 4 chan. @ 4 ohms • 90W x 4 chan. @ 2 ohms • 117W x 4 chan. Max • MOSFET power supply • Gold-plated preamp RCA outputs

Description


Infinity brand icon

Authorized dealer

  • Reference Series Class AB 4-Channel Amplifier
  • RMS Power Rating:
    • 4 ohms: 75 watts x 4 chan.
    • 2 ohms: 90 watts x 4 chan.
    • Bridged, 4 ohms: 180 watts x 2 chan.
  • Max power output: 117 watts x 4 chan.
  • MOSFET power supply
  • LED power and protection indicators
  • Tuned Bass EQ (0-6 dB bass boost at 50 Hz)
  • IMS inputs allows connection to other Infinity expansion products
  • Gold-plated preamp RCA outputs
  • DC, overheat, over or under voltage, and short circuit amplifier protection
  • Gold-plated RCA level inputs
  • Variable high-pass filter (32-320 Hz, 12 dB/octave)
  • Variable low-pass filter (32-320 Hz, 12 dB/octave)
  • CEA-2006 compliant amplifier
  • Frequency response: 20-20000 Hz
  • Efficiency: 85 dB
  • Dimensions: 14-3/4"L x 9"W x 2-11/16H
  • 4-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • Factory refurbished with full 1-year exchange warranty. The warranty on the refurbished model is actually better than the new one. Within 1-year we will exchange the amplifier if a defect occurs, and with the new model it is only for the first 30 days.

Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
75 watts x 4 channel
RMS Power @ 2 ohms
90 watts x 4 channel
RMS Power @ 1 ohm
Not Stable
Bridged RMS Power
180 watts x 2 channel
Amplifier Specifications
Amplifier Class
A/B
Number of Channels
4-Channel
Total Peak Power Output
468 watts
Total RMS Power Output
360 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
2 ohms
Minimum Impedance Bridged
4 ohms
THD at Rated RMS Power
1%
Speaker Level Inputs
No
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
High-Pass Crossover Frequency
32 - 320 Hz
Low-Pass Crossover Frequency
32 - 320 Hz
Signal-to-Noise Ratio
85 dB
Bass Boost
0 - 6 dB
Remote bass/level controller
No
Fuse Rating
35A x 2 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

Model Number:

475a-RB

Weight:

14.00lbs

Internal SKU:

LS-475a-RB

Internal Product ID:

13285

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



5 star
50%
4 star
50%
3 star
0%
2 star
0%
1 star
0%



Durability
4.3
Value
5
Features
4.8
Design
3.8
Usability
4.8

Customer Reviews

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Awesome Amp!

This amp was a great deal through Sonic. I have owned for 6 months and it has been trouble free.

By newbwrx on November 15, 2009

3

found this helpful.

Infinity Reference 475a. Good Value!

Nice amp. 75 watts 4 channel. Has good crisp sound up to max. No distortion. I'm about to buy an Infinity sub amp and 12" woofer. I like the way the amp puts out blue light to dress up my trunk. I would recommend this amp!

By DAshley33 on February 17, 2009

3

found this helpful.

Great Buy!!

I have had this amp for around 6 months now and to tell you the truth i was a little sceptical about buying a refurbished amp but no problems yet. i have had it in 3 vehicles now a 92 gmc 1500, a 03 honda civic ex, and now in a 99 honda civic si. in the 03 civic i totaled it (flipped 5 times) luckily no one was hurt (i was the only one involved lol) and the amp still plays like a dream althouth it does get a lil hot but no big deal plays very clean and clear nice improvement even with stock speakers.

By Patrick on March 11, 2009

2

found this helpful.

Nice Amp. Refurb is okay.

This amp works great powering 4 Infinity Kappa 5 1/4" speakers. Being a refurb, it looks a little rough. The snap off/on cover on mine was held in place with hot glue as a couple of the connectors were broken. Can't see it but I wasn't very impressed with that. Great price though if you don't care about cosmetics.

By Alex on December 28, 2008

2

found this helpful.

Add-ons


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