Definitive Technology DI 5.5BPS Disappearing Series Rectangular Bipolar 5.25″ In-Wall Speaker

Definitive Technology DI 5.5BPS In-Wall Bipolar Surround Speaker

The Definitive Technology DI 5.5BPS is a compact yet powerful in-wall speaker designed for surround and ambient channel applications in home theater and multi-room audio systems. Engineered with a flush-mount, flangeless profile, it integrates seamlessly into walls or ceilings while remaining visually unobtrusive. The speaker employs a bipolar configuration using two axially aligned 1-inch pivoting pure aluminum dome tweeters and two 5.25-inch Balanced Double Surround System mid/bass drivers. This design produces broad, even sound dispersion, enhancing immersion and spatial realism in surround sound environments. The BDSS drivers provide extended bass response and dynamic output typically associated with larger speakers, while maintaining clarity and control. A rigid PolyStone basket minimizes mechanical resonance and prevents unwanted vibration, preserving sonic accuracy at higher listening levels. The three-position environmental EQ switch allows performance adjustment based on room placement and boundary conditions, while the adjustable high-definition crossover ensures smooth frequency transition between drivers. Energy-absorbing Aero Ring technology and specialized baffle materials reduce diffraction and improve off-axis response. Installation is simplified through a paintable micro-perforated magnetic grille and included wall mounting template, eliminating the need for plasterwork. The DI 5.5BPS is designed to deliver expansive, lifelike surround sound performance while remaining hidden within architectural spaces.

Features of DI 5.5BPS

• Flush-mount in-wall or ceiling installation

• Bipolar speaker design for wide sound dispersion

• Paintable micro-perforated grille for seamless integration

• Two 5.25-inch BDSS mid/bass drivers for extended low-frequency output

• Two 1-inch pivoting pure aluminum dome tweeters for precise imaging

• Wide frequency response from 28 Hz to 30 kHz

• Three-position environmental EQ for room-specific tuning

• Adjustable high-definition crossover for optimized driver integration

• Energy-absorbing Aero Ring to minimize diffraction distortion

• Magnetic grille fasteners for clean, secure installation

Specifications of DI 5.5BPS