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Infinity Reference 311a

347W Max, Class A/B Monoblock Amplifier (REF311A)

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Infinity Reference Class AB Monoblock Amplifier • Max Power: 347W x 1 chan. • RMS: 312W x 1 chan. @ 2 ohm • RMS: 116W x 1 chan. @ 4 ohm • 0-12 dB Bass Boost

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Product Highlights


Infinity Reference Class AB Monoblock Amplifier • Max Power: 347W x 1 chan. • RMS: 312W x 1 chan. @ 2 ohm • RMS: 116W x 1 chan. @ 4 ohm • 0-12 dB Bass Boost

Description


Infinity brand icon

Authorized dealer

  • Infinity Reference Class AB Monoblock Amplifier
  • RMS Power Rating:
    • 4 ohm: 116 watts x 1 chan.
    • 2 ohm: 312 watts x 1 chan.
  • Max power output: 347 watts x 1 chan.
  • Variable low-pass filter (32-320 Hz, 12 dB/octave)
  • Dynamic Bass Optimization circuit (0-12 dB @ 20-80 Hz)
  • CEA-2006 compliant
  • Preamp inputs and outputs
  • Fuse rating: 30A x 1
  • 8-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
  • Dimensions: 12-1/8"L x 13-1/4"W x 2-11/16"H
  • 1-year SonicElectronix.com warranty

Product history:

Infinity 1300a thumbnail
(newest, current model)
Infinity 311A thumbnail
(previous model, replaced by Infinity Reference 1300a)
Infinity 310A thumbnail
(previous model, replaced by Infinity Reference 311a)

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Specifications & Details


Power Specifications - Full Range Channels
RMS Power @ 4 ohms
116 watts x 1 channel
RMS Power @ 2 ohms
312 watts x 1 channel
Amplifier Specifications
Amplifier Class
A/B
Number of Channels
1 - Mono
Total Peak Power Output
347 watts
Total RMS Power Output
312 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
81 dB
Remote bass/level controller
No
Fuse Rating
30A x 1 
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

311A

Weight:

10.00lbs

Internal SKU:

311a

Internal Product ID:

9926

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


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

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