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Infinity Primus PS312 Powered subwoofer

Item # 108PS312BK

Infinity's Primus PS312 powered subwoofer pumps up your movies and music with thunderous bass you can feel as well...

Infinity's Primus PS312 powered subwoofer pumps up your movies and music with thunderous bass you can feel as well...

Item # 108PS312BK

Shop all Infinity Powered Subwoofers

About the Infinity Primus PS312

Dave Bar

Add more life to your movies and music

Infinity's Primus PS312 powered subwoofer pumps up your movies and music with thunderous bass you can feel as well as hear. A massive 400-watt amplifier powers this sub's 12" woofer to fill even large rooms with punchy, well-defined lows. The combination of a patented Metal Matrix Diaphragm® driver and a low-resonance enclosure ensure this subwoofer can rock out without introducing any audible distortion.

Add more life to your movies and music

Infinity's Primus PS312 powered subwoofer pumps up your movies and music with thunderous bass you can feel as well as hear. A massive 400-watt amplifier powers this sub's 12" woofer to fill even large rooms with punchy, well-defined lows. The combination of a patented Metal Matrix Diaphragm® driver and a low-resonance enclosure ensure this subwoofer can rock out without introducing any audible distortion.

Infinity's exclusive Metal Matrix Diaphragm driver

The PS312 features Infinity's exclusive Metal Matrix Diaphragm ("MMD" for short) driver technology in the 12" front-firing woofer. It consists of a stiff aluminum core, anodized on both sides for increased strength and rigidity. The result is extremely fast, accurate response, giving you distinctly cleaner, more realistic bass, even at higher volume levels.

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Product highlights:

  • bass-reflex design
  • 400-watt RMS amplifier
  • 12" front-firing MMD® (Metal Matrix Diaphragm™) driver
  • frequency response 25-150 Hz (±3dB)
  • continuously variable 50-150 Hz crossover
  • phase switch
  • line-level stereo RCA inputs
  • unfiltered LFE (Low Frequency Effects) mode for connection to a home theater receiver's subwoofer output
  • auto on/off
  • black wood grain vinyl finish
  • 14-3/8"W x 17-13/16"H x 20-1/16"D
  • warranty: 5 years driver, 2 years electronics
  • MFR # PS312BK

What's in the box:

  • Black powered subwoofer
  • 6.5' AC power cord
  • Back cloth grille (installed/removable)
  • Owner's Manual (En/Fr/Sp)

Customer reviews for Infinity Primus PS312

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4.5 out of 5 stars
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More details on the Infinity Primus PS312

Stacey B.

Features & specs

Enclosure Bass Reflex
Woofer Size (inches) 12
Woofer Composition M.M.C.
Firing Direction Front
Amplifier Output (watts) 400
Frequency Response 25-150 Hz
Connections
Preamp-Level Inputs Yes
Speaker-Level Inputs No
Speaker-Level Outputs No
Wireless No
Controls
Low-Pass Crossover Freq 50-150 Hz
High-Pass Crossover Freq N/A
Phase Switch Yes
App Control ---
Remote ---
Other Info
Height (inches) 17-13/16
Width (inches) 14-5/16
Depth (inches) 20-1/16
Weight 44.7 lbs
Speaker Parts Warranty 5 Years
Speaker Labor Warranty 5 Years
Amplifier Parts Warranty 2 Years
Amplifier Labor Warranty 2 Years

Product Research

Features
Controls
Connections

Features

Metal Matrix Diaphragm (M.M.D.): Derived from the C.M.M.D. material used in Infinity's flagship Cascade series, M.M.D. features a stiff aluminum core, anodized on both sides for increased strength and rigidity. M.M.D. transducers conduct sound faster than paper, polypropylene, and Kevlar, pushing unwanted resonances beyond the operating range of the transducer. M.M.D. drivers deliver crystal-clear, distortion-free sound from dynamic digital sources, even at high listening levels. The PS212 is equipped with a front-firing, 12" M.M.D. woofer.

Amplifier: This subwoofer is powered by a 400watt (RMS) amplifier, rated at 35Hz - 150Hz with no more than 0.1% THD. The maximum (peak) power output is 700 watts.

Surround: For a smoother response and improved durability, the woofer uses a rubber surround.

Bass Port: There is one rear-firing bass port that allows deep bass with high acoustic efficiency and low distortion.

Controls

Gain Control: The subwoofer has a rotary control on the rear panel for adjusting the level of the bass.

Low-Pass Crossover: The subwoofer features a continuously variable 50Hz-150Hz low-pass crossover that determines the highest frequency at which the subwoofer reproduces sounds. The crossover has a 24dB/octave slope. The crossover is bypassed when the "LFE/Normal" switch is in the "LFE" position.

Phase Switch: The subwoofer's phase switch 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."

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.

Connections

Line-level Inputs: The subwoofer has a gold-plated LFE input (single RCA) and gold-plated stereo RCA inputs. If you have a Dolby Digital/DTS receiver or processor with a low-frequency-effects (LFE) output, you should use the LFE input on the subwoofer. If your receiver/processor does not contain a Dolby Digital or DTS processor but has a subwoofer output, you must use the stereo RCA inputs. If the receiver/processor has a mono subwoofer output, a "Y" adapter is recommended to maximize performance.

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