Alright so I have had my system in for a couple of months now and I have finally had some time to really get to know it. Now that the hype of having a new system is over I am starting to listen to my normal music and not just rap, so thats stuff like 311, Eve 6, and Modest Mouse. And i have to say is that, it sounds amazing for being a 15. It keeps up with the fastest drum kicks and its clean and crisp. I could not be happier with the SQ of this sub. Before i had 2 10's and those were amazing for rock but this is just as good if not better, I got the benefit of being much louder and having lower notes but did not give up any accuracy!

Now for the SPL side of the Q. This baby is loud!!! I was totally blown away by how loud this driver will get. I went in with the idea of just having a really good SQ setup which i did, AND i got a spl score worth cometiting with! I couldnt believe it when i hit a 145.4 on my first run ever playing Lil Jon. Now I am just curious of what I can really hit after tweaking and playing tones. The only thing that could be better to me that what I have now is 2 Q 15's

Heres what Im Running

98' S-10 Ex. Cab

HU:Panasonic CQ-C7403U

Sub: Fi Q 15' d2

Amp: Hifonics BXI 1606d

Box: 4cubes @ 30 htz (by Scott)

Batt: Deka Intimidator

Dbs: 145.4 in the headrest (Throw it up)

Now some pics

This is how it looks now

This is probably my favorite pic

Pretty much the standard routine the day your sub arrives haha

Heres the Enclosure that Scott designed for me, I couldnt be happier

This is pretty much the bulk of my stuff, I believe it is a successful setup.

Thank you Scott and everyone else at Fi, I couldnt have done it without your help! You have my all of my respect and gratitude.

Amazing... I hit almost the same numbers with my Resonant Engineering SX 15 in my yukon (146.3 in 5.5 cubes, tuned to 33hertz). With it tuned at 30 hertz, that's a nice number. I'm wanting the Q-series 18 if I can sell my current 15. Congrats! How do you like that Hifonics amp? I've heard mixed reviews about them, but also heard the 06+ models push what they say. What do you think?

how the Hifonics playing the Fi?

u think it can take more?

i have d 2000D in it.

power like mad.

ramdaspadhye, both the 2005 and 2006 are the same amps wit different heatsinks.

they wont disappoint you.

I am also curious to know how the Hifonics amp performed. I have the 1606d also and I am hoping to get this same subwoofer. Did Scott help you out with the dimensions?

Wow 145 is pretty good for one 15.

How would that compare to the same setup with just 1000rms?

Just in case, send the topic starter a PM with your questions.

I know this post is old but I would like to say this is the post that started my car audio journey, I have 2 fi 15 Qs walled and I just got a DD M3a and I got 148.2 at the dash sealed. My buddy just sent me 0 gauge wire today and I will be doing the big 3 very soon to keep my voltage steady, so I can drop down to .5 ohm. Im also getting sound deadener to deaden my doors and floor to possibly increase some spl. I only had time to test 2 songs and thats the score I got on Throw it up. With a little more tweaking and few more additions I hope to break 150. So thank you for this review you made!