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Infinity Primus PS312

Powered subwoofer

51 Reviews

Item # 108PS312BK

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Overview

Our take on the Infinity Primus PS312

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.

more than i expected, wonderful bass. replaced a 10" klipsch...no comparison, movies are more enjoyable...everyone has been impressed with it's outstanding performance and very reasonable pricing...thanks...

Bob, Dayton, OH

What's in the Box:

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

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
  • Our 60-day money-back guarantee
Reviews

Infinity Primus PS312 Reviews

Average Customer Review(s):

(51 Reviews)
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Details

Hands-on research

Features and Specs

Enclosure Bass Reflex
Video Shielded No
Woofer Size (inches) 12
Woofer Composition M.M.C.
Firing Direction Front
Wireless No
Preamp-Level Inputs Yes
Speaker-Level Inputs No
Speaker-Level Outputs No
Low-Pass Crossover Freq 50-150 Hz
High-Pass Crossover Freq N/A
Phase Switch Yes
Amplifier Output (watts) 400
Frequency Response 25-150 Hz
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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Accessories
Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

from the reviews that were posted. [ raymond  Nov 07, 2016 ]
I have primus surround sound speakers for my home theater and decided to add a second sub to the setup. [ Clark  Nov 03, 2016 ]
good reviews and my klipsch died after 1 year [ Robert  Oct 07, 2016 ]
The quality of Infinity at a great price. The reviews were great. [ Eileen  Sep 05, 2016 ]
advisor recommended for larger patio space [ Blake  Sep 05, 2016 ]
Good reviews, great value, good quality reputation with this brand. Harmon consumer electronics has a good name for making great sounding speakers at a value price [ Eric  Aug 08, 2016 ]
I was persuaded by the features and reviews. [ Michael  Jul 29, 2016 ]
By its features, brand and aftersales service commitment... [ Reynaldo  Jun 01, 2016 ]
All the speakers in my home theater system are infinity and am picky because I want them all to match. I also choose this because I wanted a more powerful subwoofer. I love thundering bass! [ Bobby Alan  Mar 22, 2016 ]
Old sub crapped out. Good experience with Infinity speakers in the past. Crutchfield has excellent customer service and delivers fast!!! [ S  Mar 21, 2016 ]
Price, spec and sound [ Antonio  Mar 11, 2016 ]
low freq response, front firing speaker, 12", auto on, good wattage [ Ray  Mar 08, 2016 ]
I had an Infinity sub base for about 12 years and it fried. I was happy with it so I bought another one. It is a great speaker, plenty of base, more than you need, good speaker [ Ben  Feb 14, 2016 ]
Price! Plus range of frequency and 5 star ratings review. [ Kevin  Feb 01, 2016 ]
I already own one of these subs and my new Dolby atmos receiver can use 2 subs. Pretty exited! [ Michael  Jan 31, 2016 ]
My old infinity woofer was messing up. [ richard  Jan 31, 2016 ]
cost, reviews , specs [ aussie chicago  Jan 31, 2016 ]
This sub has an unusually narrow width 14.5 (inches) for a 12 inch subwoofer - so it's the biggest powered sub that fits my narrow placement limitations. [ James  Jan 27, 2016 ]
Great product [ Neal  Jan 24, 2016 ]
Best subwoofer for the money. [ Luis  Jan 07, 2016 ]
Highly recommended subwoofer with the lowest frequency floor in the price range. [ John  Jan 06, 2016 ]
Trust in product name hopefully as good as PS212 [ Anthony  Jan 05, 2016 ]
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