I have been looking in to these two subs for months now reading everything I can. I am still stuck maybe some smart people can help me out. ok I am looking for high quality, clarity, accurate, punchy sound not so much loud. mainly SQ. I had two Pioneer TS-W309D4 in a sealed box at 1.15 Cu. Ft. Air Space per sub. powered by a Pyle PLA2678. I liked this sound it sounded nice punchy. but I wanted something better so this guy told me about FI and Audio Pipe amps . so then I got a FI SSD 12 with only interior leads. powered by a AUDIOPIPE APSM-1500 and in 2cu ft. of air space. tuned to 32hz ported. it got so loud my nose flap would shake and it was awesome and still is. but it didn't have the clarity I wanted, nor the accuracy. it wouldn't hit the higher bass notes from the bass guitar and the kick was way to woofy and just big sounding. so I did some looking and got a new amp Hifonics BRX2000.1D this amp is amazing it hit everything way cleaner and I could hear the high notes. but it is still to woofy and big. so I running it sealed now 1cu ft. air space. now I like it. but it could have a nicer tone with higher quality subs. so if anyone has anything on those two subs the FI Q 12 or PSI Platform 2. please help me.