All of my boxes ive built over the past 5-6 years have all had aero ports. They are efficient and the 9-11" per cube sound on par. I typically use a single 6" aero for a single 15" box that anywhere from 3.5-4.75 cu/ft, and for a single 12 ive used 2-4" aeros up to 2.75cu/ft. Currently the 2-10" Sundown x's that i built my box for used 2-4" aeros to get tuning to 32hz for a 3.55cu/ft box. Hell i used 2-6" aeros for my single 18" Zv4 box that was 8cu/ft and it was tuned to 30hz and got stupid low. I usually keep tuning for everything i build from 30-32hz. Bc it will slaughter the lowz and still get it ar 38hz or so
...but i dont like high bass, thats just me lol
2013 Toyota Highlander
Build to come.....