ASC TubeTrap - 20" Edition, Super Clean

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This ASC TubeTrap is 20" tall by 16" in diameter.

More from the ASC Website:
The original portable bass trap, the TubeTrap is a highly modified version of Harry F Olson’s “functional sound absorber” and operates far more efficiently and to a lower frequency than its size would suggest. By including an integral treble range polycylindrical diffuser with each unit, Art Noxon (ASC founder, president, engineer) created a broadband acoustic control device able to maximize the sound quality in any space.

Their cylinder shape provides the structural rigidity and internal air cavity necessary to absorb sound in the low frequency range. It’s their diameter, not length, that determines how deep into the bass range they can absorb. Because TubeTraps are “impedance-matched” to sound, they are fast-acting bass traps. Unlike slow acting membrane and resonator bass traps, TubeTraps handle musical transients just as easily as they handle sustains. TubeTraps transform room acoustics into an unforgettably articulate and dynamic musical bass line.

More from a  Home Audio Equipment Review written by Dave Duvall:
"Art Noxon founded Acoustic Sciences Corporation (ASC) in 1984. Since then, ASC has been firmly established as one of the leaders in the field of acoustic treatment.

The subject of discussion here, the Tube Trap, was the world's first corner-loaded acoustic bass trap and can be found in home listening rooms, recording studios, concert halls, churches, and auditoriums throughout the world.

Art's products are so significant that the FAA relies on them for acoustical control.

ASC Tube Traps work. I can't put it more simply than that.

In my room they created much more articulate mid- to upper-bass performance, and aided in taming the acoustic reflections that would otherwise spoil the musical experience.