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  1. 18" Subwoofers
    1. Product: FI Audio Sp4 18's Brand New in Boxes!! Never seen ANY power and only unboxed to photograph. These are no longer available unless you previously bought some FROM FI yourself and have receipt. So if you own this model and need replacements one or just want spares on hand here's your...
  2. 18" Subwoofers
    Fi SP4 v1 18 D2 NIB Dual 2 ohm 4" coil, 3300W RMS Upgraded cooling and carbon fiber dust cap and heavy duty push terminals-Not FOAD leads. Weighs about 72lbs Brand new, never used and only removed from the shipping box to take pics. Its V1 which you can only get if you previously bought...
  3. Wanting to Buy (WTB)
    Product I'm looking for: FI BTL triple stack, or motor. Budget: Probably no more than what they cost brand new-$550 for a driver in pristine condition-adjusted according to condition Condition: Functional OR NOT, does not matter. Time Frame (if applicable): Now ** DO...
  4. Wanting to Buy (WTB)
    Product I'm looking for: Looking to buy 4 18's. Anything around 1500-2500 rms Dual 1's preferably. Open to different brands but would like some XL's or Fi subs Budget: $1000-1200 Condition: Used but in working condition. Not blown Time Frame (if applicable): ** DO NOT...
  5. Build Logs
    Ok, hopefully i won't get as much hate here. This forum seams much nicer. If you live in or near the Springfield Illinois area, let me know! I just wanted to try something different. Hopefully you guys enjoy reading this. My car doesn't like all these builds.. Here was my last setup with my...
  6. Car Audio Trader (WTT)
    1. Product: Fi Sp4 15 2. Specs: D1 coils 3. Description/Condition: Lookin for blown zv.4 15 4. What you are looking for: : Sundown Zv.4 15 D2 coils Pictures of your item for trade: [/B] ** DO NOT DELETE ANYTHING BELOW THIS LINE OR THREAD WILL BE DELETED **...
  7. Car Audio Packages
    1. Products: Fi Sp4 15 <<SOLD>> Crescendo Bc3500 <<SOLD>> Mechman 240 amp alternator 2. Specs: Fi: 3000 watts rms, dual 1 ohm coils, cooling 3. Descriptions/Condition of all items: All items are in great condition 4. Total Price: : Individual prices: Fi:$400 5. Pictures...
  8. 15" Subwoofers
    1. Product: Fi Sp4 15 2. Specs: DUAL 1 | Fs: 27.6 Hz Re: 0.65 Ohms/coil Qms: 6.56 Qes: .52 Qts: .48 Mms: 434g Cms: 0.77mm/N Sd: 810cm^2 Vas: 70.4 l Spl: 86.4dB 1W/1m Bl: 13.7 N/A Xmax: 33mm Rms: 3000W Sealed box: 2-3.5cuft Ported box: 3-5cuft Sub OD: 15.625” Cut ID: 14.125”...
  9. Wanting to Buy (WTB)
    Product I'm looking for: Sound Qubed Hdc3 18 dual 2 Budget: They are $329 shipped each new. I want used sub so used price. Condition: Used not new. 6/10 condition at least Time Frame (if applicable): ** DO NOT DELETE ANYTHING BELOW THIS LINE OR THREAD WILL BE DELETED **...
  10. Car Audio Packages
    Finally parting with my lovely sound system and selling my car! My next car will be a 71 Monte Carlo and I am pumped! I will entertain all offers and trades. ALL PRICES AND TRADES ARE NEGOTIABLE Let me know what you think! For a faster response text 5126325040. otherwise just pm. I have plenty...
  11. 15" Subwoofers
    1. Product:FI BL 15 2. Specs: 1500 watts RMS, 3000 peak. [B]3. Description/Condition: hey guys. I have a BNIB FI BL 15 with dual 2 coils, cooling and flat wind coil options on it. Its been sitting in my room since i got it and i decided to just go ahead and get rid of it. It wont let me...
  12. Sound Quality Area
    i going to do 1 18 and i need a sub that sound good and get very low these are my choices fi ssd , fi q, ssa xcon, or sundown x i have had the rest of the brands these are the only 4 i haven't had yet which 1 will get the lowest and sound the best in a 8 cubic ported enclosure any info please...
  13. Wanting to Buy (WTB)
    Product I'm looking for: Sundown SA-15 recone. (Dual 4) no D2's please Budget: They are $50+ shipping new so base your price off of that and we can work s deal Condition: Not used Time Frame (if applicable): I need it ASAP ** DO NOT DELETE ANYTHING BELOW THIS LINE OR...
  14. Car Audio Videos
    I made these videos at a really big show in Atlanta last weekend. Here are just a few I took.. Handing out Demos - Can You Handle 4 18's?? - YouTube 6 Sundown 15's - Man tries not to tap out - YouTube Hair Trick from 4 18" FI BTL's - YouTube Sundown Audio 15's - Girls getting Hair Tricked! -...
  15. General Car Audio Discussion & Questions
    Do they hit hard :)
  16. 15" Subwoofers
    1. Product: Fi Sp4 15" 2. Specs: DUAL 1 | DUAL 2 Fs: 27.6 Hz | 27.9 Hz Re: 0.65 Ohms/coil | 1.27 Ohms/coil Qms: 6.56 | 6.45 Qes: .52 | .52 Qts: .48 | .48 Mms: 434g | 424g Cms: 0.77mm/N | 0.77mm/N Sd: 810cm^2 | 810cm^2 Vas: 70.4 l | 70.4 l Spl: 86.4dB 1W/1m | 86.5dB 1W/1m Bl: 13.7 N/A |...
  17. Car Audio Trader (WTT)
    1. Product: 2 kicker solo x 10's 2. Specs: 2500rms/5000 peak 3.5" copper coils dual 1 ohm triple stack 45lb magnet best part about these subs is if u can some how blow them, they make DROP IN recones. u dont even have to take the whole sub out of the box to change coils and cone! 3...
  18. 12" Subwoofers
    1. Product: (2) 12" Fi Qs D1 2. Specs: Fs: 34.1 Hz | 34.0 Hz Re: 0.70 Ohms/coil | 1.4 Ohms/coil Qms: 7.31 | 7.38 Qes: .37 | .37 Qts: .36 | .36 Mms: 230g | 2235g Cms: .88mm/N | .88mm/N Sd: 310cm^2 | 310cm^2 Vas: 11.8 l | 11.8 l Spl: 83.3dB 1W/1m | 83.2dB 1W/1m Bl: 13.9 N/A | 19.6 N/A Xmax...
  19. Build Logs
    I started out this year competing in MWSPL Xtreme Trunk class. Currently, I have the highest score in this class. I blew my sub ( I have a problem with this...which is my own stupidity!). So, decided to build a wall for the Xtreme 3 class! Old build:
  20. Build Logs
    Here are some updated pics everything is done and installed except i havent recieved recone kit yet so still waiting for that to be shipped and delivered, but enjoy tell me what you think. Picked up my box that was built locally by surreal its a horn designed enclosure huge port mouth he...
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