Definitive Technology Mythos XTR-SSA3 Passive 3-Channel Home Theater Sound Bar

Definitive technology....

Excite your senses with invisible sound
Dt series:
  • Experience sensational sonic performance that seemingly disappears into walls and ceilings.
Every piece chosen for a purpose
  • Dt series speakers were developed from the ground up with the highest quality materials. Clear, natural sound springs from high definition drivers, as acoustically optimized tweeters reveal the most delicate of details.
  • All while wafer-thin grilles hide in plain sight. Each component specifically selected to maximize performance.

Surround sound to believe in

  • Envelop your home in rich, high performance sound from built-in speakers that won’t encroach on your living space.
  • Choose from a wide variety of dt series single stereo and surround loudspeakers to create a complete stealth home theater experience.

Product Research

XTR-SSA3 Soundbar: 

  • The Definitive Technology Mythos XTR-SSA3 Soundbar provides three channels (Front left/Center/Front right) from one ultra-slim loudspeaker.
  • The XTR-SSA3 Soundbar is the perfect audio solution when you are unable or unwilling to use three discrete front speakers in your home theater.
  • The XTR-SSA3 provides dynamic punch, wide frequency range, and broad dispersion.
  • The Soundbar's ultra-slim design is a perfect match for today's ultra-thin flat-panel TVs.
  • It comes with a table-top stand and is wall-mountable.
  • For complete surround sound enjoyment, mate the XTR-SSA3 with matching Mythos XTR-20BP surround speakers (735XTR20BP, sold separately) or any of Definitive's in-wall or in-ceiling speaker solutions.
  • Driver Technology
  • Enclosure Design
  • Connections
  • Mounting Options

Driver Technology

SSA (Solo Surround Array) Technology: 

  • The Mythos XTR-SSA3 Soundbar's left & right channel arrays utilize patented SSA technology to vastly widen the stereo image to lifelike proportions.
  • You'll enjoy a sonic image that is as wide as the wall with incredible three-dimensionality.

Pure Aluminum Dome Tweeters: 

  • The XTR-SSA3 Soundbar's three 1" hyper-definition aluminum dome tweeters are the same tweeters found in Definitive's award-winning state-of-the-art Mythos ST SuperTower.
  • The pure aluminum dome tweeters provide clarity, dynamic range, and extended high-frequency response.

XTDD Technology Drivers: 

  • The Definitive Technology Mythos XTR-SSA3 Soundbar utilizes six 3.5" Definitive XTDD technology anodized Aluminum dome drivers for extraordinary performance.
  • Using state-of-the-art computer modeling and decades of speaker design experience, Definitive engineers eliminated every inch of wasted space, optimized every part, and maximized the moving surface area of a dynamic driver to shrink it down to a very compact dimension without giving up ultra high performance audio fidelity.
  • The XTDD drivers provide dynamic punch, a wide frequency range, and broad dispersion that flat vibrating membrane panel-type speakers simply cannot match.

Enclosure Design

Ultra-Thin Aluminum Enclosure: 

  • The Definitive Technology Mythos XTR-SSA3 Soundbar features an ultra-thin aircraft-grade aluminum cabinet that fits today's flat-panel televisions perfectly.
  • By specially shaping the enclosure and incorporating stiffing ribs and channels, Definitive made the space-efficient extruded aluminum enclosure ultra-rigid and resonance-free.
  • The magnets of the XTDD drivers protrude through the rear wall of the enclosure to further minimize depth.
  • A thermally conductive gasket seals the enclosure/magnet interface and transfers heat from the driver's rare-earth magnet to the enclosure, making the whole enclosure a giant heat dissipater.

Magnetic Grille:

  • The Mythos XTR-SSA3 Soundbar features a black cloth magnetic grille which easily attaches and detaches from the speaker.


Speaker Terminals: 

  • The Mythos XTR-SSA3 is equipped with a plug-in C-clamp speaker terminal to attach your receiver's speaker wire (up to 12 AWG).


  • The speaker terminals are color-coded and labeled (+/-) to distinguish between Front Left, Center, and Front Right speaker channels.

Mounting Options


  • The Mythos XTR-SSA3 is designed for horizontal use only. The Soundbar can be positioned below, above, or in front of your flat-panel television.
  • The XTR-SSA3 matches perfectly with 46" to 65" flat-panel televisions.

Table-Top Mount: 

  • For shelf-mounting in front of or below the TV, the XTR-SSA3 comes with two different sets of adjustable feet.
  • For shelf-mounting in front of or below the TV, the XTR-SSA3 comes with clever adjustable feet that can raise the speaker over the TV's protruding shelf stand.
  • It can also be placed on a shelf below the TV and angled up towards your ears via the supplied shelf supports
Adjustable Height Feet:
  •  Use these adjustable feet when placing the Soundbar on the same shelf as the TV.
  • They allow you to raise the speaker over the TV's pedestal base.
Adjustable-Angled Feet: 
  • Use these adjustable supports when placing the Soundbar on a shelf below your flat-panel TV.
  • They allow you to angle the speaker up towards ear level.
  • The adjustable feet attach to the Soundbar speaker using the supplied hardware (1/4"-20 x 12mm screws).


  • The Definitive Technology XTR-SSA3 can be mounted to the wall, above or below your flat-panel television.
  • The Soundbar includes a wall-mount bracket and hardware, along with dual keyhole slots.
Wall-Mount Bracket: 
  • The Mythos XTR-SSA3 comes with a wall mount bracket that allows direct mounting to a wall (wall-mount screws not supplied).
  • The wall-mount bracket attaches to the Soundbar speaker using the supplied hardware (1/4"-20 x 12mm screws).
Dual Keyhole Slots: 
  • The XTR-SSA3 Soundbar also features dual rear-panel keyhole slots which allow you to easily hang the speaker on the wall without any bracket by simply using two screws (not supplied).
  • The two keyhole slots are spaced 32.75" apart.
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