The P4 optimizes compactness. For fuller base, consider the HDP6, not these little gems. 4" woofers can only do so much. That said, these speakers are superb! Bought as B speakers for Yamaha A-S301 amp.
Front-ported, which makes a lot of sense for speakers designed actually to fit on a bookshelf; No frivolous grilles to remove and then throw away or stash in a closet never to be used again-thank you, Audioengine! Available in classic, Audiophile matte black finish.
The truly performance-enhancing, dapper, tilted stands which Audioengine makes for these speakers are horribly overpriced; I was glad I had some rewards points in my Crutchfield account to blow on these little stands.