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Infinity Reference SUB R12

Powered subwoofer

4 Reviews

Item # 108SUBR12

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Our take on the Infinity Reference SUB R12

The thrill of the bass

Add heart-pounding excitement to your movies, music, and video games with Infinity's Reference SUB R12 subwoofer. This hard-hitting sub delivers clean, deep bass thanks to a high-output 12" woofer and powerful 300-watt RMS amplifier. Whether it's explosions, earthquakes, drums, or an acoustic upright bass, the SUB R12 will let your hear and feel the rumble.

Infinity Reference SUB R12 powered subwoofer

Solid construction, solid sound

Much of the SUB R12's powerful performance comes courtesy of its strong-yet-lightweight fiber-composite 12" woofer and solidly built, tuned-port enclosure. Infinity employs internal edge-to-edge windowpane bracing to eliminate cabinet vibration while providing a firm foundation for the driver. This combination of structural strength and robust driver provides powerful, deep bass response that will make your music and movies come alive.

Easy system integration

Line-level and LFE (Low Frequency Effects) inputs let you easily connect this sub to most audio systems. Its back-panel volume, crossover, and phase controls help you fine-tune the bass to your liking. A low frequency trim control provides up to 4dB of boost at 35 Hz for added impact. Auto power control means you never need to worry about switching the SUB R12 on or off, as its signal sensing circuitry will handle that for you. The SUB R12 makes an excellent addition to any Infinity Reference stereo music or home theater setup.

Product Highlights:

  • frequency response: 29-150 Hz
  • built-in Class D amplifier delivers 300 watts of continuous power, 600 watts peak power
  • 12" fiber-composite high-output woofer
  • bass reflex (ported) design
  • rear-mounted level, crossover, phase, and power controls
  • continuously variable low-pass 50-150 Hz crossover
  • phase switch (0/180°)
  • three-position low-frequency trim control provides up to 4 dB of boost at 35 Hz for added impact
  • auto on/off
  • line-level/LFE RCA inputs
  • black woodgrain vinyl finish
  • 15-5/16"W x 18-11/16"H x 18-3/8"D
  • weight: 40.2 lbs.
  • warranty: 5 years speaker, 2 years amplifier
  • Our 60-day money-back guarantee

What's in the Box:

  • Powered sub
  • Grille
  • 4 Spiked feet
  • 15' Mono-sub cable (w/ a male RCA connector on each end)
  • Owner's Manual
  • Important Safety Instructions

I have had and currently have several powered Subs. This unit exceeds expectations ! I had to look at my invoice to make sure that it did not cost more ! Slamming Bass no matter what my input source is.

Mark, Florida


Infinity Reference SUB R12 Reviews

Average Customer Review(s):

(4 Reviews)
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Hands-on research

Features and Specs

Enclosure Bass Reflex
Video Shielded No
Woofer Size (inches) 12
Woofer Composition Fiber composite
Firing Direction Front
Wireless No
Preamp-Level Inputs Yes
Speaker-Level Inputs No
Speaker-Level Outputs No
Low-Pass Crossover Freq 50-150Hz
High-Pass Crossover Freq None
Phase Switch Yes
Amplifier Output (watts) 300
Frequency Response 29-150 Hz
Height (inches) 18-11/16
Width (inches) 15-5/16
Depth (inches) 18-3/8
Weight 40.2 lbs
Speaker Parts Warranty 5 Years
Speaker Labor Warranty 5 Years
Amplifier Parts Warranty 2 Years
Amplifier Labor Warranty 2 Years

Product Research


12" Woofer/300W Amp: The Infinity Reference series SUB R12 powered sub features a 12" fiber composite woofer with rubber surround and a 300W RMS/600W Peak amplifier for dynamic bass response. There is one rear-firing bass port that allows deeper bass with high acoustic efficiency and low distortion.

Controls: All of the powered sub's controls are located on the back-panel. There is a Subwoofer Level control for adjusting the level of the bass to match the output of your front speakers. There is also a continuously variable (50-150Hz, 24dB/octave) Low-Pass Crossover which determines the highest frequency at which the subwoofer reproduces sound. The crossover is bypassed when the crossover is set to the "LFE" position. The powered sub's Phase Switch (Normal/Reverse) allows you to control the phase of the subwoofer's output relative to the front speakers; if the bass sounds muddy or unclear, toggling the phase control can sometimes strengthen the bass "attack". In addition there is a LF Trim switch which boosts the powered sub's bass level (0, +2dB, or +4dB) in comparison with the rest of your system.

Line-level Inputs: Two gold-plated RCA jacks are provided for connecting the powered sub to your AV receiver. You can use a single RCA cable to connect the Subwoofer or LFE (low frequency effects) Output on your receiver to the powered sub's L/LFE line-level (RCA) input. Since most subwoofer/LFE outputs are filtered by most receivers/processors, the subwoofer's variable low-pass filter is usually not required and should be bypassed; this is done by placing the sub's crossover to the "LFE" position. If your receiver has preamp outputs, or if you are using a receiver without a designated subwoofer/LFE output, the preferred connection is to use a stereo RCA cable plugged into both left and right line-level RCA inputs. If the preamp outputs are unfiltered, the subwoofer's internal crossover should be used placed in the "50-150Hz" position.

Auto On/Off Circuit: The auto on/off circuit turns the power amp on when a signal is sensed and turns the amplifier off and into standby mode approximately 10 minutes after a signal is no longer received. An LED indicator on the rear panel glows green when the amplifier is on and red when the amp is in standby.

Mounting Feet: The Infinity Reference series SUB R12 powered sub features integrated rubber feet to prevent against unwanted vibration and protect your hardwood or tile flooring. The powered sub also comes with four spiked feet which screw into the integrated rubber feet, ideal for carpeted flooring. The spiked feet add approximately 0.4375" of height to subwoofer.

Our Product Research Team

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Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

My system needs a sub, the size was recommended, it is on sale, and it came with a 15 foot RCA cable. [ Aric  Jan 07, 2016 ]
Matches the rest of my Infinity Reference series speakers [ John  Dec 30, 2015 ]