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Definitive Technology Mythos 3C-75 On-Wall Passive Sound Bar for 75 Inch TVs

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  • $ 1,999

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The Mythos 3C-75 ultra-slim, on-wall passive sound bar for 75”-class TVs elevates your home theater experience with premium sound and designer aesthetics in an adjustable-width, weather-protected enclosure.

The Mythos 3C-75 three-channel passive sound bar elevates home theater experiences indoors and in covered outdoor areas. Combining the three front channels of a home theater system in a single cabinet, this ultra-slim on-wall, three-way speaker blends high-performance sound and designer aesthetics in a weather-protected, adjustable-width, rigid aluminum enclosure.


  • Thirteen-Speaker Array for powerful, accurate sound
  • XTDD Drivers for spacious, dynamic sound in every seat
  • Slim Profile and Adjustable Width for a streamlined appearance
  • Acoustically Optimized Cabinet for pristine sonic reproduction
  • Luxury Finishes and Sharp Styling for elevating any living space
  • IP66-Rated Protection for security in the elements
  • Timbre-Matching for uniform voicing in any configuration
  • Total System Scalability for elevating any home cinema
  • All-In-One Sound Bar Big sound in an ultra-slim cabinet


Dimensions (H x D): 6.25 x 1.87 in. (159 x 47.5 mm)

Adjustable Width (W): 65.8 x 69.2 in. (1671 x 1758 mm)

Symmetrically Adjustable Extensions: 3.42 in. (87 mm)

Weight: 20 lbs (9.3 kg)

Color/Material: Black anodized aluminum

Grille Material: Micro-perforated powder-coated steel

Tweeter: (3) 1 in. aluminum oxide dome

Midrange: (2) 3.5 in. XTDD aluminum dome

Woofer: (8) 3.5 in. XTDD aluminum dome

Number of Channels: 3 (left, center, right)

Frequency Response: 100 Hz–25 kHz (-10dB) | 120 Hz–20 kHz (-3dB) 

Nominal Impedance: 4Ω (8Ω compatible)

Sensitivity: 88dB (2.83V/1m)

Recommended Amplifier Power: 80W

IP Rating (Ingress Protection): IP66

Warranty: 5 year

Included Accessories: (2) VESA-mount brackets and spacers | (1) Wall-mount bracket

WARNING: California Residents - Proposition 65. This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to



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