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Definitive Technology Mythos 3C-75 Indoor/Outdoor 3 Channel Passive Soundbar

Item Number: DT-Mythos-3C-75
Definitive Technology
Product Status:
Leaves Warehouse within 2-3 Weeks

Price: $1,999.00
Leaves Warehouse within 2-3 Weeks
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    Mythos® 3C-75 On-Wall Passive Sound Bar

    Superior Sound, Streamlined Style

    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.

    On-wall, adjustable-width, three-channel passive sound bar for 75”-class TVs.


    Premium Definitive Technology acoustics in a designer-
    inspired, adjustable-width enclosure.


    Sleek, low-profile designer cabinet adjusts to match
    television dimensions.

    Ideal for
    Outdoor Use

    Weather-resistant, IP66-rated construction ensures reliable
    performance, indoors and in covered outdoor environments.

    Sleek and Streamlined

    Big, Wide Sound

    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

      A three-way, 13-driver system comprises two XTDD 3.5” mid/bass drivers and one 1” aluminum oxide tweeter for each left/right channel. The center channel features two XTDD 3.5” mid/bass drivers, four XTDD 3.5” woofers, and one 1” aluminum oxide tweeter. Together they project robust, full-range sound over a wide area.

      XTDD Drivers
      for spacious, dynamic sound in every seat

      Ultra-stiff anodized aluminum dome woofers and midrange drivers eliminate break-up and broaden dispersion for crisp, clear sound and a spacious, enveloping soundstage.

      Slim Profile and Adjustable Width
      for a streamlined appearance

      3C-75’s ultra-slim, wall-mount cabinet measures less than 2” deep; symmetrically adjustable extensions expand up to 3.5” to perfectly align with the dimensions of 75”-class displays, for a cohesive look.

      Acoustically Optimized Cabinet
      for pristine sonic reproduction

      A highly rigid, tuned aircraft-grade aluminum enclosure houses a 13-speaker array, with each channel in its own acoustic chamber. You’ll experience the truest sound, uncolored by cabinet resonances.

      Luxury Finishes and Sharp Styling
      for elevating any living space

      With clean, modern aesthetics; refined anodized aluminum finishes; and VESA mount compatibility (VESA and wall-mount brackets included); this sleek, wall-mount sound bar presents a streamlined appearance under your TV.

      IP66-Rated Protection
      for security in the elements

      IP66-rated protection against dust and high-pressure water streams means you can enjoy stunning home theater sound indoors and in covered outdoor areas.

      for uniform voicing in any configuration

      Consistent sound across Definitive Technology models gives you the flexibility to mix and match speakers to build the ultimate system or a starter system that can expand as your needs grow.

      Total System Scalability
      for elevating any home cinema

      Take a minimalist approach with a simple, all-in-one on-wall system or build the ultimate home theater.

      All-In-One Sound Bar
      Big sound in an ultra-slim cabinet

      Use a Mythos 3C-75 on its own or with a Descend subwoofer for larger-than-life sound in a low-profile, all-in-one system.

      Convenient Mounting Options

      Mythos three-channel passive sound bars are wall-mountable or compatible with VESA mounts, allowing them to easily attach directly to either a wall or TV for a sleek, cohesive look.


      Dimensions (H x D)6.25 x 1.87 in. (159 x 47.5 mm)
      Adjustable Width (W)65.8 ~ 69.2 in. (1671 ~ 1758 mm)
      Symmetrically Adjustable Extensions3.42 in. (87 mm)
      Weight20 lbs (9.3 kg)
      Color/MaterialBlack anodized aluminum
      Grille MaterialMicro-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 Channels3 (left, center, right)
      Frequency Response100 Hz–25 kHz (-10dB)
      120 Hz–20 kHz (-3dB)
      Nominal Impedance4Ω (8Ω compatible)
      Sensitivity88dB (2.83V/1m)
      Recommended Amplifier Power25-150W per channel
      IP Rating (Ingress Protection)IP66
      Warranty5 year
      Included Accessories(2) VESA-mount brackets and spacers
      (1) Wall-mount bracket

        Product Documentation

        Information Sheet