considering doing a box with aero's wanna tune it lower also around 30 hz

right now its in 3.4-3.5 cube at 34 hz on 3k rms

to get the tune i want and my depth issues guided me here, i hear you need to have roughly the diameter of the pipe distance from flare to back of box for it to be right?

so final figure would be 4.25 cubes at 30 hz with 1 6" Aero at 16.5" for that tuning and thats from flare to flare. Should i just go to 2 3" aero's or what do i do hear, because i will be going 16.5"+6"+1.5" for the MDF im too close to the rear hatch, it would be like 3-5" from it

2 3" ports have no where near the surface area of a single 6" port (they actually have about half) and may give you compression problems on the bottom end with that sub at full power (is this an LMS 15"?)

5" of clearance would be perfectly fine, 3" may introduce some weird tuning issues, but it won't really add much in terms of compression...

Less than 2" is where you would run into problems....