Definitive Technology DI 5.5R
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 5.5R grille is a mere 7-3/8" (18.62cm)in diameter, about the same visible size as competitive nominal 5-1/4" in-ceiling speakers. With Definitive's DI Series you get more sound per square inch of visible speaker.
Buying from an authorized dealer has many benefits such as valid warranty coverage on your purchase and peace of mind.
Features
- Flangeless design & micro-perf grille minimize visibility
- Simple to install — no spackle work required
7-3/8" (18.62cm)visible diameter is noticable 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
- Optional fire-rated enclosures
- Cast PolyStone™ baskets for rigidity without “ringing”
Specifications
- Outer flange (grille) diameter | Metric :7-3/8" | 18.62 cm
- Cut out diameter | Metric :6-5/16" | 16 cm
- Depth from flange | Metric :3-5/8" | 9.04 cm
- Driver complement :1-inch (25mm) pivoting Aluminum dome tweeter axially aligned with a 5-1/4" (13.3 cm) BDSS bass/midrange driver
- Frequency response :28Hz - 30kHz
- Impedance :4 - 8 Ohms
- Sensitivity :89 dB
- Recommended associated amplifier power :10 - 175 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
- Warranty :5 years
- Weight | Metric :3.7 lb. | 1.67kg each
About Definitive Technology
Definitive Technology has been committed to building superior sounding home audio and home theater loudspeakers since 1990, when the company was founded by Sandy Gross, Don Givogue and Ed Blais—lifelong audiophiles and experts in speaker design, acoustics and marketing. Definitive Technology loudspeakers are among the most positively reviewed and most often honored high performance loudspeakers on the market as well as being the best-selling premium home loudspeakers in the US.
Since its inception, Definitive has won an astounding number of awards and over-the-top enthusiastic reviews from Consumer Electronics industry associations as well as leading audio/video print magazines and websites. Frankly there are too many to list them all here but the photo on this page gets the point across.
Most recently a speaker system consisting of Definitive Technology Mythos STS SuperTowers, Mythos Nine center and Mythos Gem surrounds was awarded Sound & Vision magazine’s “Audio Product of the Year;” not merely “Speaker of the Year” but “Audio Product of the Year.” The system also won SoundStage!.com’s 2008 Reviewer’s Choice Award for Aesthetics and Sound. Home Theater magazine called the STS system “Crisp, Lush, Focused” and tagged it with a coveted Top Pick award. The STS also took home two Innovations Design and Engineering awards at CES 2009, one for High Performance Audio and the other for Home Theater Speakers. One industry award is an honor, five is a sweep.
View all Definitive Technology items
Manuals and Brochures
Manual Information Examples

...into adjacent rooms.
Figure 3
Placement Options
Definitive Technology Di Series Loudspeakers give you nearly endless .... But remember that placement choice for your in-
wall speakers bears careful consideration, as
installation requires that you cut a...
Definitive Technology
Di SERIES OWNER'S
MANUAL
Models: 3.
5R, 4.
5R, 5.
5R, 6.
5R,... Your
Disappearing In-
Wall Speakers Please Inspect For Shipping Damage
Each
loudspeaker leaves.... Please unpack your
system carefully. Save all cartons and packing materials...
Definitive Technology
Di Series
Di 3.
5R
Di 4.
5R
Di 5.
5R
Di 6.
5R
Di 6.5STR
Di 8R
Di 5.5S
Di 6.5S
2

... or tools, contact your
Definitive Technology dealer, general contractor or a professional
installer.
Figure 6b
Aiming the ... direction [Figure 6]. When using
Di Series In-
Wall Loudspeakers as front/main
home theater speakers or as stereo
speakers in...
Definitive Technology
• Make sure the material into which you plan to
mount the
speakers (plaster, drywall,... not conceal studs, electrical wiring or plumbing. Prior to
installation, hold the
speaker with
grille on in your chosen location to make sure ...
Di SERIES OWNER'S
MANUAL
SAFETY FIRST
When
installing your
Di Series In-
Wall Loudspeakers, be aware of the ...way to
install these
speakers, consult a professional
installer, your authorized
Definitive Technology dealer, or a building contractor.
NOTES...

... Length Total Depth *
Mounting Depth In-
Wall ** Woofer Tweeter Product Weight
Frequency Response Sensitivity Impedance ...or damage to the Product caused by
installation or removal of the Product.
Definitive Technology makes no
warranty with respect to ...
Definitive Technology
• Place the
speaker carefully into the cutout. If you have a level,... frame. Powerful magnets hold the
grille in place.
Lock arm screws. Turn counter... arms tucked in prior to
installing speaker in
wall.
Figure
13
Figure 14
Lock...
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