When floor real estate is precious, the ASC AcousticSoffit is the answer to your bass trapping, treble control, and diffusion needs.  By utilizing a large air cavity surrounded by a flow-resistive membrane made from porous absorptive material, the AcousticSoffit provides the benefits of flat wall panels and large-diameter free standing TubeTraps in a tidy, easy-to-install package.

This is a custom engineered product, sized specifically to integrate into your room and make it sound–and look–its best.  Our standard size unit protrudes 16″ from the wall and 10″ down from the ceiling.  This works extremely well for most rooms, and is roughly equivalent to installing 16″ TubeTraps along the entire length of your wall/ceiling intersection!

ASC engineering has taken care of the mathematics to ensure that your room remains sonically controlled without becoming over-deadened.  You will hear much more sonic detail from your speakers, from fine string work in orchestral passages to crystal-clear movie dialog and singers.  True broadband control can be yours as musical bass lines emerge and sparkling ambience surrounds you.

The ASC AcousticSoffit is a one-stop acoustic treatment that in many cases will be all you need.


  • Home Theaters
  • High End Listening Rooms
  • Post Production / Mixing Suites
  • Conference Rooms

With hundreds of hours of real world testing, ASC’s engineering and product development technicians have produced the best acoustical soffit available anywhere. Acoustic engineers have known for hundreds of years that a soffit is an excellent sound diffuser.  ASC improved the idea to include absorption and custom room tuning.

Priced by the foot, standard model.  Custom sizing and upgrades incur additional charges.



Front Wall Soffit

  • Head-end ringing control
  • Room mode reduction
  • Improved intelligibility

Front Wall Soffit +TowerTraps

  • Excellent head-end ringing control
  • Two-axis mode control
  • Good for dual sub installs
  • Dramatic look

Full Perimeter Acoustic Soffit

  • Extreme bass control with no footprint
  • Upper corner reflection control
  • Lateral diffusion improves ambience
  • Improves main/surround balance
  • Smooth architectural look

Bare room

    • Poor imaging
    • Excessive bass buildup in corners
    • Low intelligibility
    • Poor main/surround balance

Full Perimeter + TowerTraps

  • For use with a larger sound system
  • Ultimate mode control
  • Striking appearance

Additional information


Quartz, Silver Papier, Gray Mix, Medium Grey, Black


Per Foot 10″x16"x12″

Absorption Coefficients

(testing done in-house by ASC)

63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz
0.81 1.10 1.07 1.03 1.01 1.00


All Soffits are built to order, allowing a perfect fit in any size room.  Soffits can be built in custom depths and heights to match existing architecture, or to accommodate HVAC ducts or low-voltage electrical wiring.  Custom 3-sided pieces can be built to complete a run of Soffit when obstacles prevent a full perimeter Soffit from being installed.

Custom Fabric Colors

Any product using our Guilford Stock Fabrics can have one of our 70+ custom fabrics ordered.

Custom Fabric Pricing is 10% additional, minimum $175/order.

  • If your selection is 499.00, the total cost for custom fabric is 499.00+50.00=549.00

Custom fabric does not impact shipping costs or product weight.

We carry many custom colors in our factory, but this is not guaranteed.  Orders requesting custom fabric will require 1-2 weeks lead time based on availability.  Contact us for details and availability.

TubeTrap Endcaps

These are painted gloss black with texture lacquer.



  • Height: 10″ depth: 16″
  • Pricing starts at $125/ linear foot
  • Contact us for pricing and design specifications.

TubeTraps (all variations)


  • Standard TubeTraps products are built taller than the nominal listed height by 1/2″ to 3/4″
  • Maximum available single height for any full-round product is 48 1/2″
  • Custom Sizes under 4′ available


  • All of our TubeTrap products are also ~3/8″ oversize in diameter.

Custom Sizes

These are built within 1/8″ tolerance.

  • A 13 x 3ft TubeTrap will have a diameter of 13 3/8″ and a length of approximately 36 5/8″
  • A 16 x 46″ Custom made TubeTrap, which will have a diameter of 16 3/8″ and a length of 46″ +/- 1/8″

This includes but is not limited to:

  • TubeTraps
  • IsoThermal TubeTraps
  • Quarter Rounds
  • Half Rounds
  • TowerTraps (all variants)
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