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Triad InWall Bronze/4 SlimSub

Triad InWall Bronze/4 SlimSub

Triad Speakers just released the InWall Bronze/4 SlimSub, an in-wall subwoofer utilizing a long-throw 10-inch aluminum driver in a narrow enclosure with a flat grill that mounts flush to wall. Measuring 3-15/16 inches deep to fit into a standard 4-inch deep wall cutout, the flat grill, flush mount design of the SlimSub represents an aesthetical improvement over the model it replaces, the InWall Bronze/4 Sub, which protruded several inches from the wall.

Triad says the SlimSub delivers deep bass at high volumes, achieving a maximum output of 109 dB from 40-80 Hz with bass extension of -6dB at 25 Hz. This performance also represents an improvement over the previous model; in fact it rivals that of the company’s larger, 6-inch deep InWall Bronze/6 model.

According to Triad Speakers President Larry Pexton, the company achieved such rich performance by finely-tuning the sealed enclosure to match the excursion of the proprietary long-throw 10-inch aluminum driver employed. Triad engineers also integrated a round steel back-plate that serves to replace the thick MDF behind the driver, capturing more air volume to accommodate the lengthy throw of the driver.

Triad RackAmp 350 DSP

The SlimSub fits into the same cut-out (size “V”) as the company’s other in-wall subs, making it ideal for retrofit opportunities. To further blend with the decor of most any home, the SlimSub incorporates all 3 types of Triad’s Acoustimesh grill (wide, narrow and frameless) which the company can custom paint-match at the factory.

Price and Availability
The InWall Bronze/4 SlimSub is available now with Triad’s 350-watt rack amplifier (RackAmp 350 DSP) for $1,400.


  • Drive Units: (1) 10″ Proprietary aluminum cone woofer
  • Impedance: Driver impedance 4 ohms (8 ohms – dual sub configurations)
  • Maximum Output: 109 dB from 40-80 Hz with bass extension of -6dB at 25 Hz
  • Enclosure: Highly compact, fully braced and sealed cabinet
  • Flush Acoustimesh metal grill fits flat against the wall
  • Designed to be used in stud walls, false walls or custom cabinets with or without using the Acoustimesh metal grill
  • Finishes: Grill and frame available in various paint and custom matched finishes
  • Amplifiers available:
    • RackAmp 350 DSP: Rack mountable (1 space rack height)
    • RackAmp 600 DSP for dual sub configurations

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