Alpha P3 Compact Bookshelf SpeakersHear beautiful texture and detail All new Alpha Series models employ a (19mm) black anodized aluminum dome tweeter that extends the high frequency response beyond the Alphas 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