Infinity Primus PS312 12" 400W Powered Subwoofer - Each (Black)

Model: PS312BK UPC: 050667368388 Item: 149947

Highlight the lowest bass notes in your music library with the Infinity Primus PS312 Powered Subwoofer. This 12” Infinity subwoofer is a powerhouse for bass production, using Metal Matrix Diaphragm technology to play a clear, noiseless audio, focusing instead on the desired notes in each track. The ultra-precise transducers ensure that each beat is met in rhythm with the rest of your system.

Infinity Primus PS312 Subwoofer Features:

  • Powerful bass sound that works great in new or existing stereo systems
  • Made with patented MMD woofer technology for clean sound
  • Precise crossover keeps the bass audio in-sync with other connected speakers

Product Information

The Infinity Primus Series: Where Infinity sound begins.

Prepare to raise your expectations and experience home entertainment at a new level of clarity and realism. From unobtrusive bookshelf systems to dazzlingly powerful home theaters, there’s an Infinity Primus system that’s right for every purpose and room in your home. Most other speaker systems in the Primus price range sound as if they are spraying their sound at you; tinny, hollow and reproduced. With its MMD transducer technology and seamless component architecture working in unison to eliminate unwanted resonance modes, the Infinity Primus PS312BK doesn’t spray - it immerses, rolling over the listener with warm, rich sound the way live music does. Combine the Primus PS312BK with any one of Infinity’s powerful MMD-equipped floorstanding loudspeakers or bookshelf speakers, and the Primus PS312BK will fill any room with dramatic and well-defined sound. This is where Infinity sound begins, and its well within your reach.

The Infinity Primus PS312 powered subwoofer serves as a great addition to any existing stereo system, but works beautifully with others in the Primus line. Add to a couple of P363 speakers together to get a full stereo sound with a bass punch, or use the P163 bookshelf speaker to complete a compact system. You can also add some focus to the vocals with the PC251 center speaker.


Infinity Primus PS312 Subwoofer Highlights:

  • Powered subwoofer
  • Single 12" (300mm) MMD low-frequency drivers
  • 25Hz - 150Hz frequency range
  • 400 watts RMS
  • 700 watts peak
  • 50Hz - 150 Hz. 24dB/octave continuously variable
  • Legendary Infinity engineering - speaker components seamlessly work together as an integrated system
  • Extremely low resonance enclosures - hear music exactly as it was recorded
  • Tweeter waveguides improve on-and-off-axis high-frequency response
  • Precision crossover networks
  • Patented MMD transducers significantly improve cone performance, providing ideal rigidity and resistance to precision sound across the entire spectrum


Infinity Primus PS312 Subwoofer Features:

The Infinity Primus PS312BK - Not just loud. Accurate.

  • Let's be honest - there's not a whole lot to a subwoofer. It's one big speaker that gets loud and shakes pictures off the wall. So what separates a good sub from the not-so-good? It's more than power - give anything enough juice, and it will get loud. No, the secret to a good powered subwoofer is its accuracy and clarity. Infinity should know - they invented the powered subwoofer in 1968. They've come a long way since then, With the Infinity Primus PS312BK's Metal Matrix Diaphragm technology and low resonance enclosures, it possesses excellent transient frequency response - agile and sharp. Music is clean and movies rumble. Hear music the way it was meant to be heard and experience a film score like never before without the speaker changing or altering the sound - precisely as it should be. Combined with its superb linear frequency response, you can fill any room with sound you can feel. Got an older system? Bring it to life with an Infinity Primus PS312BK subwoofer. Give your system a soul - only, please make sure you've secured your pictures to the wall, first.

Primus. Where home theater begins.

  • The Infinity Primus PS312BK is the perfect home theater companion. Give any film score that extra rumble and that powerful bombast. Experience the cacophony of your favorite battle or chase scene with the clarity and soul of a movie theater experience. The Primus PS312BK brings long-term, plug-and-play, trouble-free enjoyment to your home theater, unheard of at this price point - and it is the perfect complement to any 5.1 or 7.1 channel home theater system.

Patented MMD transducer technology.

  • Derived from Infinity's patented CMMD technology, the Metal Matrix DiaphragmTM (MMD) approach continues the Infinity tradition of using advanced materials to improve sonic accuracy. These diaphragms are much stiffer than standard metal ones - by anodizing both sides of an aluminum core, they're able to significantly improve cone performance and outperform cones made of paper, polypropylene or Kevlar material. By virtue of its extreme rigidity and resistance to resonance, MMD material is far more than just another diaphragm substance. It is an ideal diaphragm material for the ultimate listening experience. Sound propagates at a higher velocity in metals than in materials such as polymers and papers. Sound will travel through MMD material nearly twice as fast as it will through any other cone material - thus, moving unwanted resonances outside the audible range.

Superior Infinity engineering.

  • The Infinity Primus PS312BK's speaker drivers, baffles, cabinets and waveguides are designed to work seamlessly together as an integrated system - fitting together like pieces of a jigsaw puzzle. It begins with Infinity's ultra-precise transducers - the beating heart of the Primus PS312BK. MMD technology doesn't change, color or distort audio signal sound the way diaphragms made of other materials do. This combines with the Primus speaker's low resonance enclosures to compound the precision qualities of the transducer, further eliminating mechanical distortion.

Infinity - Legendary reputation. Uncompromising craftsmanship and sound.

  • With the Infinity Primus PS312BK, you not only experience the cutting edge in high-performance transducer technology and sound reproduction, you experience the cutting edge from the makers of Infinity products - some of the world's most innovative, high-quality audio equipment. The road to the Infinity Primus Series is a road lined with dozens of audio milestones: The Infinity Servo Statik 1a - the world's first powered subwoofer. The EMIT (Electromagnetic Induction Tweeter) device. The revolutionary IRS speaker - the world's first "reference" loudspeaker. The Prelude MTS speaker - the world's first powered tower speaker. Since 1968, innovative Infinity technologies, materials and manufacturing techniques have advanced the science of sound, and have set new standards in loudspeaker technology and performance. Infinity Primus Series speakers benefit from every Infinity innovation that has come before. This is where Infinity sound begins, and it's well within your reach.


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  1. 5.0 out of 5 stars

    Should have bought two.

    This sub is fantastic. I have been a fan of Infinity gear for sometime. This unit has power and finesse. This unit replaced a old Boston Acoustics SW -10. I loved the SW 10 but it wasn't well suited for home theater work. Like at said, this sub will surprise you, you don't need to spend your extra cash on something that costs to or three times more.