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Definitive Technology® Disappearing™ In-Wall Series 5.25” In-Ceiling/In-Wall Speaker

Model #: DI 5.5S
Definitive Technology
At a Glance
Powerful performance is practically invisible with the Definitive Technology Disappearing™ Series. With a minimal 7.38” x 7.38” grille, the DI 5.5S is remarkably smaller than competing 6.5” models but offers much more in terms of technology and sound quality.
Available in Store Only
$279.00Save $NaN

Get to know this product.

From its 5.25” BDSS™ driver and 1” pure aluminum tweeter to the high definition crossover and exclusive AeroRing™, this in-wall side/rear surround speaker conceals tremendous tonality within its tiny dimensions.

  • White Finish
  • Flangeless, flush mount design and micro-perf grilles allow a noticeably smaller 7.38” visible diameter
  • Deeper sound quality with precision BDSS™ drivers and a pivoting pure aluminum dome tweeter
  • Rigid PolyStone™ baskets eliminate unwanted vibrations to prevent ringing and minimize distortion
  • Axially aligned design provide broader sound dispersion and more natural balance

Balanced Double Surround System

Proprietary BDSS™ technology delivers the wide dynamic range and deep bass output of much larger drivers in a small-sized, high-efficiency mid/woofer.

Designed for Invisibility

With a minimal visible surface area, hidden flange architecture and micro-perf grille, the DI 5.5S disappears into any environment, without the need for custom sheetrock or spackle work.

Pure Aluminum Tweeter

The pivoting pure aluminum dome tweeter features a uniquely constructed housing, eliminating diffraction distortions typical with traditional speakers for spectacular audio performance.

Adjustable Crossover

A sophisticated adjustable crossover network with custom, high-precision components produces superior sonic purity for crisp, clean sound.



Speaker TypeIn-Ceiling Speaker
Sold AsEach
Depth3.63" (9.22 cm)
Weight3.8 lbs (1.72 kg)
Grille Dimensions7.38" (18.75 cm) h x 7.38" (18.75 cm) w
Shipping Carton6.13" (15.57 cm) h x 9.06" (23.01 cm) w x 9.06" (23.01 cm) d - 7 lbs (3.18 kg)

Driver Complement

Pivoting Dome Tweeter - Tweeter(1) 1" (2.54 cm) d (Round) Pivoting Dome Tweeter - Tweeter
BDSS Bass/Mid - Mid/Woofer(1) 5.25" (13.34 cm) d (Round) BDSS Bass/Mid - Mid/Woofer

In-Ceiling Mount

Dimensions6.31" (16.03 cm) h x 6.31" (16.03 cm) w

In-Wall Mount

Dimensions6.31" (16.03 cm) h x 6.31" (16.03 cm) w


Speaker Inputs(1) Pair of Heavy Duty, Spring Loaded - na

Audio Quality

Total Frequency Response28 Hz to 30 Hz
Nominal Impedance8 ohms
Max Sensitivity (1 watt @ 1 meter)89 dB


TypeA/V Receiver Crossover Setting
A/V Receiver Crossover SettingsSmall (80 Hz)


Cabinet Warranty5 Years
Drivers Warranty5 Years

Included Accessories

Wall Mounting Template1
Paintable Magnetic Grille1

Misc. Specs

Product Weight (lbs.)3.8
Color Finish NameWhite
Impedance8 ohms
Number of Speakers1
Speaker TypeIn-Ceiling Speakers
Depth (in.)3.63
WarningProposition 65 Warning for California Residents