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Definitive Disappearing In-Wall Series 5-1/4" Subwoofer - DI55S

Abt Model: DI55S | UPC: 093207063794
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Product Details

Definitive Disappearing In-Wall Series 5-1/4" Subwoofer, Model DI55S (Sold As Each)

Key Features:

  • Flangeless design & micro-perf grille minimize visibility
  • Simple to install — no spackle work required
  • 7-3/8 square inches (18.62 square cm) visible area is noticeably smaller than competing nominal 6-1/2" models
  • Perfect for use as side/rear surround speakers in home theater systems
  • 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
  • Cast PolyStone™ baskets for rigidity without “ringing”


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 diameters, 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. The DI 5.5S grille is a mere 7-3/8" x 7-3/8" (18.62cm x 18.62cm), about the same visible size as competitive nominal 4-1/2" in-ceiling speakers. With Definitive's DI Series you get more sound per square inch of visible speaker.

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 5.5S's 5-1/4" driver has the output, bass and dynamics of a 6-1/2" 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.

Everything You Need for Installation
ptional pre-construction "rough-in" brackets with repositionable metal mesh "arms" are available for new home construction projects.


  • Woofer: 5-1/4" (13.3 cm) 
  • Tweeter: 1" (25 mm) 
  • Frequency Response: 28 Hz – 30 kHz
  • Sensitivity: 89 dB
  • Impedance: Compatible with 4 – 8 Ohm outputs
  • Min/Max Recommended Power: 10/175 WPC

Approximate Dimensions:

  • Cutout Height: 6-5/16"
  • Cutout Width: 6-5/16"
  • Cutout Depth: 3-5/8"

Approximate Weight:

  • Unit: 3.8 lbs
  • Shipping: 5 lbs
California customers: Proposition 65 WARNING - learn more
Key Features
Sold As Each/ 4 " Subwoofer - DI55S/ Flangeless Design And Micro-Perf Grille/ Latest Generation BDSS Drivers/ Pivoting Pure Aluminum Dome Tweeters/ Adjustable High-Definition Crossover/ GaussGrip Magnetic Grille Fasteners/ 5.25 Inch Woofer/ White Finish
More reasons to buy the Definitive Technology DI55S from Abt Electronics
  • Abt.com is an authorized dealer (Learn More).
  • The Definitive Technology DI55S is Brand New.
  • The Definitive Technology DI55S Ships in a Factory Sealed Box.
  • Abt ships this product for free!
Speaker ShapeSquare
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)6.31
Width (inches)6.31
Depth (inches)3.63
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