mr_kebo 10+ year member
CarAudio.com Elite
Just had my space to work with figured up and it looks like i have around 20cubes internal before any displacment. Now the question. 4x15" AQ SD2.5 or 2 18" HDC3. Either Setup will be powerd by an AQ2200. Which will get louder and sound better? I was leaning toward the 4x15" as it "should move more air". Im up for opinions on this so lets hear them.