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Definitive Technology

Definitive Technology Rectangular Bipolar In-Wall Speaker - DI 5.5BPS

Abt Model: DI55BPS | UPC Code: 093207063817
 Discontinued Product This item is no longer available from our website.
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Definitive Technology - DI 5.5BPS - In-Wall Speakers
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Sold As Each/ Flangeless Design & Micro-Perf Grille Minimize Visibility/ Bipolar Sound Dispersion, Ideal For Side Or Rear Surround Channel Applications Or Anywhere Extremely Broad Sound Coverage Is Desired/ Latest Generation BDSS Drivers For Audiophile-Grade Sound Quality/ Pivoting Pure Aluminum Dome Tweeters/ Black Finish
Discontinued (details)
Your Shipping Zip Code: 20149 (change)

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Product Details

Definitive Technology Rectangular Bipolar In-Wall Speaker, Model DI55BPS (Sold As Each)

The Ideal Surround Speaker
Many listeners have found that built-in speakers are the perfect solution for side and/or rear channel surround speakers. They take up no floor space and virtually disappear from view. We specifically designed the DI 5.5BPS for surround channel duties. You can install them in walls or ceilings for enveloping surround effects with smooth natural response and precise detail retrieval. Every sound effect and musical note will be revealed with exact accuracy while you are enveloped in a life-like bubble of sound.

Definitive's Disappearing In-Wall Speakers Just May be the "Holy Grail" of Built-in Speakers
You want great sound everywhere in your home, but you may not always have room for or want the visual intrusion of free-standing speakers. Built-in flushmount speakers seem to be the answer but in practice they don't exactly disappear in the room, in fact many "in-wall" speakers call attention to themselves and create friction between your decorator and your audiophile sensibilities. Worse yet, most built-in speakers fall short on the performance end as well. Would Definitive allow you to suffer with bad sound? Oh no, no, no!

Definitive’s Disappearing™ In-Wall series speakers feature near-invisibility thanks to their small area, hidden flange design, and low profile micro-perf grilles. They are as easy to install as traditional flanged flush-mount speakers, and don’t require custom sheetrock/spackle skills to install yet they are practically invisible.

Definitive's Advanced Technologies Mean Better Sound for You
The Disappearing In-Wall models feature Definitive’s most advanced technologies such as Balanced Dual Surround System (BDSS) mid/woofer drivers and pivoting Pure Aluminum dome tweeters for spectacular audio performance far beyond traditional flush-mount speakers.

Definitive’s exclusive Balanced Dual Surround System (BDSS) driver technology permits these new flush mount speakers to deliver more bass output and dynamic range than larger drivers. For example, the DI 5.5R's two 5-1/4" drivers have the output, bass and dynamics of a 8" traditional speaker.

With a pivoting 1" Pure Aluminum dome tweeter featuring a specially shaped housing that avoids the diffraction distortions of traditional post-mounted tweeters, and a sophisticated adjustable crossover network, the Disappearing In-Wall models deliver the kind of lifelike sonic performance and broad even dispersion that have made Definitive Technology the most highly reviewed speaker brand in the USA.

Great Sound for Everyone in the Room
We've engineered DI Series speakers to disperse sound over a very wide area so that the sound is well-balance and natural regardless of where you are relative to the speakers. BDSS technology drivers, aimable tweeters as well as the specially countoured and textured AeroRing™ around the driver all contribute to the wide angle dispersion and superior coverage capability of the DI Series models.


  • Flangeless design & micro-perf grille minimize visibility
  • Simple to install — no spackle work required
  • Bipolar sound dispersion, ideal for side or rear surround channel applications or anywhere extremely broad sound coverage is desired
  • Latest generation BDSS drivers for audiophile-grade sound quality
  • Pivoting Pure Aluminum dome tweeters
  • Axially Aligned design ensures broad, balanced coverage area
  • GaussGrip™ magnetic grille fasteners
  • Adjustable high-definition crossover
  • Optional fire-rated enclosures
  • Cast PolyStone™ baskets for rigidity without “ringing”


  • Driver complement: Two each 1" (25mm) pivoting Aluminum dome tweeters axially aligned with 5-1/4" (13.3cm) BDSS drivers in a bipolar configuration
  • Frequency response: 28Hz - 30kHz
  • Impedance: 4 - 8 Ohms
  • Sensitivity: 89 dB
  • Recommended associated amplifier power: 10 - 225 WPC
  • Inputs: One pair of gold plated heavy-duty spring-loaded terminals
  • Available finishes: Paintable white (see manual for painting instructions)
  • Packaging: One speaker per carton

Approximate Dimensions:

  • Outer flange (grille) dimensions:
    • Width: 7.75"
    • Length: 13.625"
  • Cutout dimensions:
    • Width: 6.81"
    • Length: 12.625"
  • Depth from flange: 3.875"

Approximate Weight:

  • Unit: 8.4 lbs
  • Shipping: 10 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): 5 Years
Need Accessories?
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More reasons to buy the Definitive Technology DI 5.5BPS from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Definitive Technology DI 5.5BPS is Brand New.
  • The Definitive Technology DI 5.5BPS Ships in a Factory Sealed Box.
  • Abt ships this product for free!
Speaker ShapeRectangle
ConnectivitySpring Clip
Frequency Response28Hz - 30kHz
Impedance4 - 8 Ohms
Sensitivity89 dB
Speaker Design2-Way
Speaker TypeIn Wall
Tweeter Size (inches)1
Woofer Size (inches)5.25
Height (inches)13.63
Width (inches)7.75
Depth (inches)3.88


Speaker Wire
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AudioQuest 50 Feet G2 Speaker Cable - White Finish
Special Order: 7 To 14 Day Delivery Time
$ 64.75
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by PowerReviews
Definitive Technology Rectangular Bipolar In-Wall Speaker

(based on 3 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 3 customers

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good surrounds


from Massachusetts, United States

Comments about Definitive Technology Rectangular Bipolar In-Wall Speaker:

I have used these as surrounds for a year. Mounted 8 ft up on the rear wall, 5ft behind sofa 10 ft from each other. They do their job as surrounds well, can't pin point them. Help add to spacious sound

(1 of 1 customers found this review helpful)


who needs bookshelves???


from Denver. CO

Comments about Definitive Technology Rectangular Bipolar In-Wall Speaker:

Maybe the best surround speakers ever built; it defeats the myth that inwall speakers do not sound well. It matches very well with the LCR. Speakers swhould be heard ...not seen.


Excellent Bipolors



About Me Audiophile, Movie Enthusiast, Tech Savvy

Verified Buyer


  • Attractive Design
  • Easy to Mount
  • Easy To Set Up
  • Good Power Output
  • Great Sound Quality


  • Weak Bass

Best Uses

  • Home Theater

Comments about Definitive Technology Rectangular Bipolar In-Wall Speaker:

Great Bipolar for the money. The magnetic cover is very sleek.

  • Was this a gift?:
  • No

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Definitive Technology Rectangular Bipolar In-Wall Speaker

Definitive Technology Rectangular Bipolar In-Wall Speaker


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