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Infinity Primus Three-way dual 6-1/2-Inch Floorstanding Speaker (Black, Each)

4.6 out of 5 stars 288 customer reviews
| 96 answered questions

List Price: $329.95
Price: $245.86 + $57.00 shipping
You Save: $84.09 (25%)
Only 1 left in stock - order soon.
Ships from and sold by Quick N' Easy Buy.
Get expert setup Details
  • Three-way floorstanding loudspeaker
  • Dual 6.5" (165mm) MMD low-frequency drivers
  • 4" (100mm) MMD midrange driver
  • 3/4" (19mm) MMD hi-frequency driver
  • Five-way binding posts
2 new from $245.86 1 used from $159.00
$245.86 + $57.00 shipping Only 1 left in stock - order soon. Ships from and sold by Quick N' Easy Buy.

Frequently bought together

  • Infinity Primus Three-way dual 6-1/2-Inch Floorstanding Speaker (Black, Each)
  • +
  • AmazonBasics 16-Gauge Speaker Wire - 100 Feet
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  • Monoprice 24k Gold Plated Speaker Banana Plugs, Closed Screw Type (5 Pairs)
Total price: $269.56
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  • Buy Used and Save: Buy a Used "Infinity Primus Three-way dual 6-1/2-Inch Floorsta..." and save 51% off the $329.95 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.

Technical details

  • Brand Name: Infinity
  • Model Number: Infinity Primus P363
  • Color: Black
  • Speaker Type: Floorstanding
  • Product Warranty: one year

Compare to similar items


This item Infinity Primus Three-way dual 6-1/2-Inch Floorstanding Speaker (Black, Each)
Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart
Customer Rating 4 out of 5 stars (288) 4 out of 5 stars (396) 4 out of 5 stars (123) 5 out of 5 stars (157) 4 out of 5 stars (199) 5 out of 5 stars (110)
Price $245.86 $129.99 $74.95 $499.99 $115.75 $349.84
Shipping $57.00 FREE Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Quick N' Easy Buy Amazon.com Amazon.com Fluance Audio Amazon.com Amazon.com
Item Dimensions 12 x 16.75 x 43 in 8.88 x 10.62 x 35.19 in 7.75 x 8.75 x 36.25 in 8.5 x 13.4 x 45.8 in 12.25 x 42.75 x 13.25 in 43.63 x 17.5 x 7.75 in
Item Weight 45 lbs 25.81 lbs 20.35 lbs 90.4 lbs 25 lbs 60.55 lbs
Mount Type Floorstanding Speaker Floorstanding Speaker Floorstanding Speaker
Speaker Type Floorstanding Floorstanding Surround Floorstanding Floorstanding Floor Standing Speakers

Product description

Product Description

Infinity Primus Three-way dual 6-1/2" floorstanding speaker Black (Each)

From the Manufacturer

Incredible sound. Incredible price.

Prepare to raise your expectations. 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 speaker that's right for every purpose and room in your home.

The Infinity Primus P363BK's midrange reproduction is almost perfectly neutral - providing inner musical detail and ambience from any type of music, and any volume level. Combined with its superb linear frequency response, the P363BK sparkles in the high frequencies to reproduce acoustic instruments and vocal tracks with robust midrange power to wash you in sound. The P363's transient response is equally impressive - agile and sharp - perfectly reproducing sophisticated percussion and piano modalities. With the Primus P363BK's Metal Matrix Diaphragm technology and low resonance enclosures, you will hear music just the way it was recorded, without the speaker changing or altering the sound - precisely as it should be.

INFINITY PRIMUS P36BK - At a Glance.

  • Three-way floorstanding loudspeaker
  • Dual 6.5" (165mm) MMD low-frequency drivers
  • 4" (100mm) MMD midrange driver
  • 3/4" (19mm) MMD hi-frequency driver
  • Five-way binding posts
  • 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


  • The P363BK's tweeter delivers crystal clear high frequencies.

    Music and Movies as they were meant to be heard.

    Patented MMD transducer technology improves sonic accuracy

    Derived from our patented CMMD technology, the Metal Matrix Diaphragm (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, we're able to significantly improve cone performance and outperform cones made of paper, polypropylene or Kevlar material.


    The patented MMD material's sandwich design makes the driver incredibly strong and lightweight.
    Click here to learn more
    By virtue of its extreme rigidity and resistance to resonance, the 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.


    Acoustical waveguides deliver wide high-frequency response

    Where you sit in a room as you listen to speakers can have just as great an effect on their sound quality as the speakers themselves.

    By using an acoustical waveguide, high frequencies have a wide dispersion throughout the room.
    To make sure listening to the Primus P363BK is truly a great experience everywhere in the room, they use a proprietary "waveguide" around the tweeter. This waveguide ensures a wide dispersion of the high frequencies throughout the room while keeping them both accurate and natural-sounding. The result is an enveloping, realistic sound experience throughout the entire room, making the P363BK perfect for critical music and movie reproduction.

    Low-Resonance enclosures do not change or alter the sound

    A great sounding loudspeaker should play just what it's told to without changing or altering the sound. One way that a poorly designed loudspeaker can change the sound is when the enclosure resonates or vibrates. Resonance can change a speaker's overall tonal balance and totally alter the sound of the recording that it plays. To eliminate any enclosure resonance from the P363BK floorstanding speakers, Infinity engineers the enclosure using pinpoint internal bracing that increases rigidity so it does not vibrate or resonate. Bass sounds tight and accurate while the soundstage is smooth and precise. Plus there's the added advantage of a sleek, narrow enclosure that's at home in nearly any room décor.




    Superior Infinity engineering delivers sound perfection

    Many loudspeaker manufacturers are actually loudspeaker assemblers, buying parts off the shelf from different companies with the goal of assembling them into a final product. While this might help keep costs down, it gives very little guarantee about how the speakers are going to sound. The Infinity Primus P363BK's speaker drivers, baffles, cabinets and waveguides are all designed and engineered by Infinity to work seamlessly together as an integrated system, fitting together like pieces of a jigsaw puzzle. And since Infinity has engineered each piece for the best possible sound quality, the result is a loudspeaker that we can guarantee will dazzle you no matter what you happen to be listening to.

    Infinity - Legendary reputation. Uncompromising craftsmanship and sound.

    With the Infinity Primus P363BK, 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.









    What's in the Box

    One Infinity P363BK Floorstanding loudspeaker

    Spec Sheet


    Click here for Spec Sheet









    Complete your Infinity Primus Home Theater




    Infinity P153BK

    When you don't have a lot of room but still want great Infinity sound quality, the Primus P153BK bookshelf speakers deliver rich, detailed sound quality that is nearly the equal of the P363BK tower speakers. They are perfect for rear speakers in a 5.1 or 7.1 home theater, as well






    Infinity PC251BK

    Complete your home theater system with a center speaker that delivers the goods. The PC251BK center speaker reproduces all the important details from your music and movies while blending seamlessly with other Infinity Primus loudspeakers.




    Infinity PC351BK

    Take your movie dialog to the highest level by upgrading to the the flagship PC351BK center channel speaker.





    Infinity PS38BK

    Give your theater the bass it deserves without taking up bunch of room with the powerful PS38BK powered subwoofer.





    Infinity PS410BK

    When you want a bit more bass than the PS38BK, step up to the larger 10" PS410BK powered subwoofer.



    Infinity PS312BK

    When you really want to rattle your walls with the most explosive home theater possible, then the PS312BK powered subwoofer is for you.