I love 8" subwoofers. Here is an example of and enclosure I built for 3 JL Audio 8w3v3-4 subwoofers. It was ported around 35hz and sounded amazing. Extremely loud powered by only 800watts from a KXA800.1

I make enclosures with several different options. The enclosure pictured here has the following options: 3/4" MDF, Black Carpet, Downfiring, Ported

Being that thes are usually made to order, I can add any details you would like, including but not limited to:

Carpet: None
Black Carpet $25

Baffle: Single
Double $25
Countersunk Double $35

Terminal Plates: None
Basic Surface Mount $15
Advanced Countersunk $25

Materials: MDF
Baltic Birch $60

Downfiring: Helps to protect the subwoofer without needing a grill. Protects from objects that damage and protects from view from thieves. If they cannot see it then they will not likely steal it.

If you have any other special requests or ideas for me then please feel free to contact me for a free quote!