PSB Alpha P3 Bookshelf Speakers 4.5″ Woofer

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The PSB Alpha P3 is a small two-way bookshelf speaker that connects to any stereo or home theatre system to fill the room with powerful, crystal-clear sound. Featuring a custom 4.5 inch woofer and aluminium dome tweeter that uses a waveguide to perfectly match the low and high frequencies for a smooth transition, the P3 delivers improved directivity and flattens the frequency response for a more natural sound. It also leverages specially textured woofer cones and a unique port tube design that uses bass flex to add back energy and extend the bass frequencies even lower and without any distortion.

All new Alpha Series models employ a black anodized aluminium dome tweeter that extends the high-frequency response beyond the Alpha’s original measurements and minimizes distortion for a rich, balanced listening experience. A waveguide on the front of the tweeter works to perfect on and off-axis performance while smoothing the response for improved resolution and detail. The ferrofluid cooled tweeter on the P3 has also been precision engineered to sit below the woofer to provide precise stereo imaging at any height.


frequency response: 57-21,000 Hz (±3dB)
sensitivity: 87 dB
nominal impedance: 8 ohms
recommended power: 10-80 watts
3/4″ anodized aluminum dome tweeter with front waveguide
4-1/2″ textured polypropylene woofer with rubber surround
bass reflex (ported) design
magnetically attached grilles
gold-plated five-way binding posts
dual threaded inserts for optional wall mounting
5-3/16″W x 8-3/4″H x 7-5/16″D (each)
weight: 2.22 kgs. (each)


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