Definitive Technology Mythos XTR-SSA3

3-channel home theater sound bar

Item #: 735SSA3

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5 Reviews

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A stylish upgrade to TV sound

Definitive Technology's Mythos XTR-SSA3 gives you serious audio performance in an elegant sound bar design that cuts down on room-clutter. This three-channel speaker connects to your home theater receiver and takes the place of the left-, center-, and right-channel speakers of a traditional surround sound system. Six mid-bass drivers and three 1" tweeters elevate movie and TV dialogue to the forefront, where it belongs. And at just over 1-1/2" deep, the aircraft-grade aluminum enclosure makes an outstanding decorative match for your TV, so your eyes and ears will be equally happy.

Thin never sounded so good

The 'SSA3 uses patented Solo Surround Array (SSA) technology to vastly widen the stereo image to lifelike proportions. For complete surround sound enjoyment, mate the XTR-SSA3 with matching Mythos XTR-20BP surround speakers or any of Definitive's in-wall or in-ceiling speakers. For more bass punch add a powered subwoofer.

Flexible placement

The 'SSA3 speaker comes with everything you need to locate it where you like. It can be wall mounted simply using the rear keyhole slots. Plus the 'SSA3 comes with adjustable shelf support feet so you can place it on your A/V cabinet below your TV.

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Did you know?
Your new speakers will probably sound better after several weeks of use than they do right out of the box. That's because the material surrounding the woofers will loosen up, allowing the drivers to move more fully. Definitive Technology estimates a break-in period of 24 to 48 hours of playback before the speakers will deliver optimum sound quality. For more information and helpful tips, check out this article from Definitive's website about conditioning your speakers.

Product Highlights:

  • reproduces three channels of sound with a single speaker
  • frequency response 60-30,000 Hz
  • sensitivity 90 dB
  • 8-ohm impedance
  • handles up to 125 watts
  • six 3-1/2" XTDD mid-bass drivers
  • three 1"pure aluminum dome tweeters
  • non-powered for use with a home theater receiver
  • three pairs of 5-way binding posts
  • aircraft grade extruded aluminum cabinet
  • gloss black finish
  • includes keyhole slots and leveler feet for easy placement
  • 43"W x 5-1/4"H x 1-5/8"D
  • warranty: 5 years
  • Our 60-day money-back guarantee

Sound bar speakers: room-filling sound with less clutter

Add big sound to your TV without a roomful of speakers. Sound bars require minimal space and wiring, and their sleek designs complement today's flat-panel TVs. Most sound bars have their own built-in amplification, so you won't need to use a home theater receiver. Some models use advanced surround processing and carefully aimed speaker drivers to simulate the effects of a full home theater audio system.

Hands-on research

What's in the box?

Download owner's manual

  • Soundbar loudspeaker (with removable cloth grille)
  • Plug-in speaker terminal
  • 2 L-bracket supports
  • 2 Adjustable feet
  • Wall-mount bracket
  • Six 1/4"-20 x 12mm screws
  • 2 Rubber pads
  • Owner's Manual
  • Template
  • Online Product Registration card
  • Speaker labels

Features and Specs

Enclosure Acoustic Suspension
Pieces in System 1
Color Black
Tweeter 1.0" Dome (x3)
Midrange None
Woofer 3.5" Cone (x6)
Separate Subwoofer No
Subwoofer Driver None
Bluetooth Connectivity No
Wall-mountable Yes
Mounting Bracket Included Yes
Surface Mount Stand Included Yes
Speaker Parts Warranty 5 Years
Speaker Labor Warranty 5 Years
Amplifier Parts Warranty N/A
Amplifier Labor Warranty N/A
System Frequency Response 60-30k Hz
Powered System No
Sound Bar RMS Power 0
Subwoofer RMS Power N/A
Audio Inputs
Mini Stereo Audio Inputs None
RCA Stereo Audio Inputs None
Optical Digital Audio Inputs None
Coaxial Digital Audio Inputs None
HDMI Audio Video Connections
HDMI Inputs None
HDMI Outputs None
Sound Bar (inches) 5-1/4H x 43W x 1-5/8D
Sound Bar Weight Not Given
Subwoofer (inches) No Subwoofer
Subwoofer Weight N/A

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.

Note: 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
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).

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

Mounting Options

Placement: 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.

Note: The adjustable feet attach to the Soundbar speaker using the supplied hardware (1/4"-20 x 12mm screws).

Wall-Mount: 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.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Definitive Technology Mythos XTR-SSA3 Reviews

Average Customer Review:

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Speaker looks and sounds fantastic - difficult to mount

Written By Mike, Cedar Park, TX on Thursday, August 07, 2014

Crutchfield Customer Review (What's this?)

The speaker is mounted on the wall directly below my 48" flat panel television. It sounds great with my Denon AVR-X2000 receiver and Definitive ProSub 800 (my living room is quite large). We can actually hear the dialogue in movies/shows. My wife approves of the appearance and the logo that people are complaining about is actually smaller than the LG logo on my TV.

The mounting plate worked well with the speaker and the template allowed me to see how the speaker would look relative to the TV. I had to add spacers behind the plate to give me room to run the speaker wire (3 sets) back up to the conduit behind the TV. I also learned that you need flat head screws - rounded heads stick out and there is no room between the plate and the speaker. I think a speaker of this price should include mounting screws. I would have been more comfortable if there had been top/bottom holes all along the wall plate (as opposed to the sides) - it transitions to a set of single holes from left to right and my stud fell near the middle where I could only use one screw.

Pros: Great appearance, good sound for any speaker (much less one of this size), various options for mounting and/or standing up

Cons: Price, lack of mounting screws, difficulty routing speaker wire above the speaker when wall-mounted

Definitive Quality

Written By Max Power, Champaign, IL on Friday, August 16, 2013

Crutchfield Customer Review (What's this?)

Very well made. It looks & feels like a quality product. Sound quality is quite good. And the fact that it's no thicker than my TV is just great.

Pros: Overall size and thinness of the speaker.

Cons: Haven't seen any yet.

Great sound bar except for one design flaw.

Written By Art, Pebble Beach, CA on Tuesday, September 25, 2012

Crutchfield Customer Review (What's this?)

This sound bar exudes quality. The audio is great, it's truly beautiful, and solidly constructed. I disagree with another reviewer about the logo. IMO, it's fine; not obtrusive at all.

But it has a big design flaw: the connector. There is plenty of room on the back for proper connectors. Instead, this speaker has a single piece that you remove and feed all the speaker wires into. The problem is that the wires (and their bare ends) are WAY too close to each other and the whole thing is just far too compact than necessary. OK, maybe banana plugs would be overkill, but this is not a smart phone that requires ever-smaller components. It's a speaker that's almost 3 feet wide.

Worse still, I am trying to mount this to swivel with the TV. The little connector does not have a positive mechanical lock, so it can too easily just pop out.

Definitive, rethink this connection! If this part had been done right, this speaker would easily be 5 stars.

Excellent product

Written By JayG, Arlington, VA on Monday, February 13, 2012

I recently purchased this item along with the Def Tech Mythos 20BP surrounds. I also have a Def Tech Supercube 2000 Sub and a Denon AVR 1912 Reveiver. I have a non-ideal set up as my couch is against the back wall. I mounted the soundbar under my TV on the wall and installed the surrounds near the the ceiling angling down towards the couch. After some tinkering with the different settings on my receiver, I am extremely happy with the sound quality coming from the speakers. The voices are clear, the left and right channel sounds are also clear and expansive, and the surrounds make you feel like you are in the middle of the action. Music sounds very good as well. I highly recommend this soundbar if you are looking to a L/R/C option that is sleek looking and sounds great.

Pros: Great sound in an attractive looking speaker.

Cons: None

Beautiful, but some minor annoyances

Written By ggr, Philadelphia, PA on Wednesday, February 01, 2012

Crutchfield Customer Review (What's this?)

It's gorgeous, obviously, and the pictures don't actually do it justice. It is NOT a replacement for properly-configured floorstanders, bookshelves or rotating-baffle in-walls. But it IS a fantastic replacement for the tiny, tinny speakers that are probably insider your beautiful flat panel.

Now, for the tough part:

1. Why, why why did they put the whole model number on the front? This is supposed to be a beautiful piece of wall-hanging gorgeousness and it says "Definitive XTR-SSA3" on the front? Why not just "Definitive" like all their other stuff???

2. It came with the wrong mounting plate (ostensibly, the one for it's big brother 5-driver model). Not a huge deal as it hangs perfectly fine using the 2 keyhole slots on the back.

Pros: Beautiful, except for the label. Nice speaker jack design. Solid, well-built. Sounds great, exactly as should be expected of something this shape and size.

Cons: The front label is a horrible design aesthetic. Poor quality control (shipped wrong bracket in box).

Get everything you’ll need to enjoy your new Definitive Technology Mythos XTR-SSA3

Speaker wire is not included with your purchase. You can cut the wire to the length you need, then attach the bare ends to your sound bar's included plug-in connector.
Create a safe spot above your TV to mount your sound bar.
Complete your home theater experience with a powered subwoofer and you'll feel like you're part of the action.
The center channel reproduces most movie dialogue and more than 50% of the soundtrack information. You'll want a speaker that is voice-matched to your main speakers.
Complete your home theater speaker system with these voice-matched speakers.
Have your new speakers installed by qualified professionals.
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AudioQuest X2 Speaker Cable

14-gauge cable, connectors optional (30 feet, Gray)

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AudioQuest G2 Speaker Cable

AudioQuest G2 Speaker Cable

16-gauge cable, connectors optional (30 feet, Gray)

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Monster XPHP™ MKII

Monster XPHP™ MKII

Speaker cable with clear jacket (100 feet)

Item #: 119XPHP100


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Monster XP®

Monster XP®

Speaker cable with clear jacket, connectors optional (100 feet)

Item #: 119XPMS1H


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Monster XP® Navajo White MkII

Monster XP® Navajo White MkII

Speaker cable (50 feet)

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Center Stage Bracket CSB-3205-PRO

Center Stage Bracket CSB-3205-PRO

Sound bar speaker shelf for flat-panel TVs

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Center Stage CSB-1205 PRO

Center Stage CSB-1205 PRO

Ultra-slim speaker shelf for flat-panel TVs

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Center Stage Bracket CSB-2405

Center Stage Bracket CSB-2405

Adjustable speaker shelf kit for flat-panel TVs

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Looking for more? Check out the next model in this lineup.

Definitive Mythos XTR-SSA5

Five channels of sound, from just one speaker

The Definitive Technology Mythos XTR-SSA5 offers these features:

five channels with a total of 13 speakers

handles up to 200 watts per channel

wider frequency response of 60-30,000 for better bass