wrathcc

Bk is the right man for it

Sealed will definitely get u better sound quality than ported .......

And that being said , nothing like buying FI CAR AUDIO the best yet

Hes right about the birthsheets ,but that being said i will never buy another amp unless it's RF . Only a personal opinion guys

As long as u r running RF amps u cannot go wrong

all uguys are right , it does cost money but u only live once and if u dont stop to enjoy the things u like u will never do it , so i say waste the money becuse life passes u by in a flash and we live for debt anyway lol

Definitely true power with the RF amps

Disregard. I decided to go with an aero port which made life much easier. Yes excellent choice , i did that for my 2 18 fi btl's and i dont regret it ,and the sound is amazing..

Disregard. I decided to go with an aero port which made life much easier.

And then set them on fire in front of him

Definitely use ROCKFORD amps for true power ,def. recommend them..

Regardless of the fact guys u got to remember ,depending on the sub size these monsters can weigh as much as 70 pounds .To me the price of shipping is cheap anyway ....................Thx Jose

Damn guys i got mine with the blue to match my truck and the se monsters look sweet as hell,, could not have picked a better sub to the extreme..These things rock like no ones business ,will never buy another sub , unless FI ..............................

Yeah i know what u mean ,when i got my 18's fi btl's , i saw the ups guy pull up and actually helped him unload these monsters. When i opened these babys up, it was like a definite org*#@m . LUckily already had box built, Total devastation once installed . Once again thx Fi for some excellent and top of the line products ,, uguys are the best. Jose

All i can say guys is that there is nothing like the true power of a ROCKFORD FOSGATE amplifier ,,, i will never buy another amp that is not RF....

Yeah i currently have on rf 4000 for the 2 18 btl's fully loaded and trust me when i say this its literally shaking the hell out of my expedition .......1 is more than plenty

You are definitely right about that , in a bass world all u really want is more !!!!!!!!!!!!!!!!!!!!

i know how u feel ,just got my btl 18 's last wed. and i just put them in 2 days ago into a ported bpx at 33 hz ,and the thing is slapping .literally destroying my expedition ..daily dual 2 ohms of a rf 4000 bd til i get another 1 feel happy as shit ,since i was always used to having 12's all my life thx NIck and Scott for an xcellent job 300 amp excessive amperage alt. optima up front 1/0 gauge all the way through ads components up front and back 320i's and back pq20 for components audio control 4.1 processor ads 2 way xover 10 farad capacitor alpine head unit rf 40001 bd amp epicenter

Go with the fi ssd series for sound quality also depending on if u want ported or sealed u can also vouch for the BTL<s the best subs around