StudioTrap - TubeTrap - IsoThermal Bass Trap


Used all over the world, StudioTraps are a modified version of a TubeTrap.  Their unique characteristics make them powerful and versatile tools for use throughout all aspects of the recording industry.  StudioTraps are not only broadband sound absorbers, but also provide the broadest band of diffusion of any TubeTrap product.  When used in an AttackWall or QuickSoundField arrangement, the result is a more defined and natural sound.  StudioTraps ship with built-in stands to adjust height as needed, and color can be chosen to match nearly any room decor.

Perhaps the most popular feature of the StudioTrap is its ease of adjustment. You can quickly modify the height and diffusion characteristics in order to create the exact soundspace you need at that time. Their light weight makes them easy to tote around the room, down the hall, or around the world.

StudioTraps are fundamental components of the AttackWall and the QuickSoundField, two world-class mixing and recording environments championed by recording legend Bruce Swedien.

As with every ASC product, StudioTraps are fully fiber-sealed in acoustically transparent micromesh.  Your ears tell you that the traps are working; your lungs and vocal cords thank you for protecting them with ASC products.


  • Vocal Recording
  • Instrument Recording
  • Live show stage isolation
  • Mixing
  • Mastering
  • Room tuning

How It Works

Half of the StudioTrap body is treble diffusive which provides a a bright backscatter for frequencies above approx 800 Hz. The other half of the body is broadband absorptive, maintaining 50% efficiency all the way down to 110 Hz.  As with all TubeTrap products, the bass trapping occurs through the action of an acoustic RC circuit which operates nearly instantaneously, providing control of sonic events all the way through the ADSR envelope without coloring the timbre or tone.

As used in an AttackWall, the characteristic impedance of the StudioTrap's inner material allows it to partially absorb and partially vent low frequency energy emanating from the loudspeakers.  The "impedance walls" created by several StudioTraps arrayed together allow the operating frequency to extend well into the subwoofer range, where energy dissipation and diffusion both occur.

When arranged in a QuickSoundField layout, each StudioTrap is oriented with its diffusive face (indicated by the bright shiny button) toward the microphone and talent.  The most common QSF size (8 StudioTraps in a horseshoe pattern) provides an extraordinarily dense sequence of early reflections in the "presence" tonal range.  Thousands of reflections arrive at the microphone within the Haas window, strengthening the direct signal, while the absorptive outer faces of the StudioTraps reduce the reverberant noise.  This improved S/N ratio allows greater mobility of the performer during recording (such as a singer dancing, or a saxophonist reeling up and down) without compromising the quality of the track.


Each unit measures 9 1/2" diameter and can extend from a height of 54” to 74”.  For the engineer on-the-go, StudioTrap carrying bags are available by special order (800) ASC TUBE.



StudioTrap 9" x 54" (height adjustable to 74")      $499 each

StudioTraps are shipped 2 per box.