Is this a FI BTL 18?

what should i look for when looking at the coils? what colors are bad? and what if it isnt stiff? he said he'll bring a meter to measure the ohms
look for black or burn marks on the coils .if its not stiff ,then its used ,possibly very used and could maybe use a recone kit

 
Good sub. I've been running one identical to it for years. As has been said, the BTL's didn't always look like UFO's. Old school goodness //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 
im really excited now //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif if i buy this thing ill need a good box for it tho.. and amp.

 
pics look good. check for and rubbing/scraping, stiffness, and take a multimeter and check ohms.
thanks man. as you can see im new to this car audio game, but i am a **** good dealer. i just recently sold a fosgate p1000bd and 2 aq 12s in a probox for 560 lol using that to get this fi. i just hope i dont get burnt cause like i said im new and i can use all the advice i could. im meeting him tomorrow. fingers crossed that i get a good deal!

 
If you can see the coils look for blueing hook them dmm up to both coils, check spider for tears or seperation and check the surrounds for cracks.

Other than that $270 is a great price. What amp u gonna feed it with?

 
what should i look for when looking at the coils? what colors are bad? and what if it isnt stiff? he said he'll bring a meter to measure the ohms
Really just pushing on the cone to feel if it's rubbing + popping the terminals on each side with a flashlight battery is all you need to know. A burnt coil can often look fine from what you can see without taking it apart. Color of the coil that you can see is typically just what kind of shellac they use on the wire and means little or nothing. Either it works or it doesn't. If the sub pops when you touch a battery to each terminal and doesn't scrape when pushed in and out it'll play. Any other mechanical tears or wear should be visible even to a complete novice.

Tripple stack BTL is decent. I picked one up in here for aound 325 a couple years back. Wasn't terribly impressed, but at 270$ it's a very good value, and they can take some abuse and get loud.

 
look for black or burn marks on the coils .if its not stiff ,then its used ,possibly very used and could maybe use a recone kit
i got it!!! looks good. stiffness is ok but coils and everything else looks good. got it for 270. also got a brand new FI Q 12 fully loaded brand new. stiff as idk what. for 200. and a hifonics brutus 2000 new condition in original packaging for 175! i already have a friend of mine that is wanting to trade me for a mint RE mx d2 15. is it a good trade? or should i post it to sell on here. let me know!

View attachment 26542880

View attachment 26542881

View attachment 26542882

View attachment 26542883

 
i got it!!! looks good. stiffness is ok but coils and everything else looks good. got it for 270. also got a brand new FI Q 12 fully loaded brand new. stiff as idk what. for 200. and a hifonics brutus 2000 new condition in original packaging for 175! i already have a friend of mine that is wanting to trade me for a mint RE mx d2 15. is it a good trade? or should i post it to sell on here. let me know!
View attachment 26542880

View attachment 26542881

View attachment 26542882

View attachment 26542883
depends on the year of the re sub was made the newer ones arent very good .2006 or older is what you want

 
depends on the year of the re sub was made the newer ones arent very good .2006 or older is what you want
he said its an 08 model. also have another dude trading me an mmats 3500.05 the half ohm stable one. but idk much about those amps either

 
Activity
No one is currently typing a reply...
Old Thread: Please note, there have been no replies in this thread for over 3 years!
Content in this thread may no longer be relevant.
Perhaps it would be better to start a new thread instead.

About this thread

Giovanni15

10+ year member
Senior VIP Member
Thread starter
Giovanni15
Joined
Location
Greeneville, TN
Start date
Participants
Who Replied
Replies
39
Views
2,522
Last reply date
Last reply from
mylows10
1778578257023.png

Glen Rodgers

    May 12, 2026
  • 0
  • 0
Screenshot_20260511_212804_Amazon Shopping.jpg

Blackout67

    May 11, 2026
  • 0
  • 0

New threads

Top