https://www.cnet.com/news/psbs-iconic-affordable-alpha-series-speakers-come-in-for-a-makeover/

The speakers are available in your choice of Black Ash or Walnut vinyl finishes, with magnetically attached perforated black metal grilles. Around back there's a bass port positioned directly over the sturdy binding posts. The P5s medium density fiberboard cabinet measures a tidy 6.75 by 11.3 by 9.5 inches, and it weighs 10.3 pounds.

As you may have noticed, the speaker's front baffle layout is unusual in that the textured black 5.25 inch polypropylene woofer is on top, the .75 inch black anodized aluminum tweeter just below it. The woofer and tweeter work in harmony thanks to the new forth order crossover network. Impedance is rated at 8 ohms. The P5's interior felt damping material is placed in the middle of the cabinet to better absorb reflections, most speakers have their interior walls lined with soft material.