I have had several different setups in this car but that was before I started posting up on here. From my experience back seat down with subs and port facing into the cabin and if you're going with a decent amount of power I would recommend taking out the rear deck speakers because they will distort bad. These cars can get decently loud pretty easy it really just depends on how you set it up. I have a few more pics but they are pretty much the same. I built an amp rack at one point that was standing up but did not keep it long because I wanted to mount them flush to the floor like I did but I will see if I can find it
Ha I forgot how bad this looked, but this was the first amp rack of any kind I had ever made and ran out of white paint so just did the top in silver lol
Got 2 of the ultras. Only got to play them a little bit because it was kinda late but can already say they are louder than my 15's without being broke in and running on about 2k rms. Going to visit some family tomorrow about an hour away so it will give me some time to mess around with them.
Custom box built by Boomsday 3.1 after all displacement tuned to 36hz with a 6in aero port.
Didn't have much time so cleaning up and making a nice amp rack will be my next jobs. As of right now just took a few minutes and threw this shelf/rack together so the amps would fit. The bk800.4 is on the bottom