P4-BB Includes Only:
- Main Unit
- Round and Square grills
Features:
- Butyl Rubber Surround
- Sonic Vortex® Ported Transmission Line
Sonic Vortex® technology generates rich, deep bass and effortless clarity from what most people would call a 'back box', but is not. It is actually acompact, integrated tuned enclosure. This patented technology is a ‘twist' on Ported Transmission Line design, that optimizes air movement to produce astonishing sound. The enclosure also keeps sound from bleeding to other rooms while adding 6 to 9dB boost in mid-lower bass.
Sonic Vortex Speaker - Innovative speaker design that produces great sound in a patented enclosure. Sound bleed to adjacent rooms is eliminated by redirecting driver backside air compression. Given this redirected airflow, there is virtually no transfer of energy from the driver to the enclosure. This not only improves audio performance but also simplifies installation by eliminating the need for a backbox. Potential for drywall cracking from low frequency vibration is also eliminated and removes the need for additional bracing...even with subwoofers. Sonic Vortex speakers assure consistent performance in stereo and multi-channel systems by removing the potentially adverse affects of uneven wall and ceiling cavities.
Sonic Vortex Enclosure - The Sonic Vortex Enclosure is a tuned, sealed enclosure that captures driver backside air compression and redirects air movement to the fins, via the Sonic Vortex Airgate.
Sonic Vortex Fins - The Fins are encircled by and sealed to the inside of the Enclosure. These air channels are specially tuned for length and volume to perfectly neutralize air pressure, balancing energy transfer to the external cabinet, eliminating external vibration.
Sonic Vortex Dispersion Ports - The redirected air from driver movement exits the frontported enclosure at multiple positions, directing all audio energy into the listening area, providing a 6-9dB boost in mid-lower bass and creating an immersive 160° dispersion pattern. The captured air travels through the fins and exits out of the ports on the front of the enclosure. This assures that no audio energy is lost and all sound is directed into theintended listening area.
Sonic Vortex Airgate - The Vortex Airgate is the eye of the storm. Driver backside air compression passes through the tuned port (hole in the middle) and gets separated into multiple ported transmission lines (fins).
For more information, please see 
Data Sheet and User Manual
