Pioneer designed this sub & enclosure for those of us with very limited space. I bought one for under the rear seat of my Tundra double cab, and it was a perfect fit. The depth and pressure of the bass was exceptional considering it's a small shallow mount sub with a small amount of air space. The appearance is very basic, but that's not why you buy an under seat sub. The construction is as good as any custom or store bought enclosure, with heavy duty gold plated connections. I'd recommend an amp that meets at least the minimum rms wattage of the sub (200w) to get the full sound this sub is capable of. I give it 4.5 stars, and for the money, it's gonna be hard to find a better value.