Fi Technical

Which way should I go? - Rockford T20001BD - Audioque 2200D - Sundown SAZ-2000D Will be powering a 15" BTL. Just need some comparisons. Thanks.

Here is my problem/hold up. I am getting a new truck, one for pure audio fun, full size of course. I will be doing a cut through, so the entire bed is game. I want tons of SPL, enough to make your stomach almost turn. I want 4 15's and am not sure what to go with BTL or BL. I know I need some good amps to push them. What all power wise (wires, alt, extra batteries) would I need and about how much/where can I get a alternator from. I have some crap P3's now and want to do a massive jump up. I got addicted and my friends are killin me, want to destroy them. Thanks

hello, as stated i am in need of a box design. i got 1 18 Q and a aq1200d amp and it will be going in a 2000 grand prix. so i have about H = 16". width = 30". and length = 32" of room for a box but i do not know how big to make the port. i am going sub on top and port at back. suggestions needed.

does one 18 btl handle 4k rms for daily listening? in a 10 cft box. i just want to get the most out of my btl so i think of strapping my two bxi 2610 two 2 ohm. someone told me one could never have enough rms for music. this guy was running 4 15 l7 on a kicker warhorse.

I want to make sure I'm not going to burn up my coil on my SSD. I bought my sub 4+ years ago (I don't remember exactly), copper coil option only. Back then they were rated at 800rms. I have it wired down to 1 ohm, so it should be receiving 1200 watts+ since I have read lots of times that Sundown amps usually do over rated power. I set my gains using an SMD DD-1. I know these are frowned upon by a lot of people as a waste of money, but I didn't buy it and just borrowed it from someone who did. It helps to set gains so there's no distortion, so I'm assuming nothing is clipping. That's just my assumption though. I set up my headunit, sub amp and mains amp all with the DD…

i have 2 18btls but only one can fit in my car with a ported box. actually i want to sell one btl but in case i dont find a customer who buys it for a reasonable price, can i put both btls in a sealed box? as the other btl would just lay around losing price. i know fi doesnt recommend that. and i know i will lose alot of spl. but how would the sq change?

says they're rated at 1000rms im getting 2 18" BLs d1s with cooling options, could they handle 1600rms a peice? my box is built its 8.5 cubes (before sub displacement) tuned to 35hz

So i just got my dual 2 ohm 15 inch BTL fully loaded and I am going to run a 2100 hifonics amp to power it. So today i go to my local car audio shop so they can install it for me and they said that they can only wire it down to 3 ohm or .75 ohm because the voice coils are 1.4 ohm each...However, everyone else on this forum says they are running their 2 ohm Fi sub down to 1 ohm. I am a complete car audio noob so if someone could please tell me if this is true or not i would greatly appreciate it. Thank you!

So I just ordered two of these X 10's without really paying close attention. I have an Audiopipe APSM1300 amp that does 600@2ohm and 1000@1ohm. My question is are these subs maybe a little underrated because I've also read these amps might be a little overrated. I can always turn the gains and bass level down and go easy on the volume knob. Does this sound like it may work? I dont really have much more of a budget for subs. Im also not looking to be real loud.

I would dare to say I am pretty cautious. I have a 12" Q dual 2, cooling and all that, and am running a 1000 watt rms mono amp to it. I was just kinda curious as to whether it was possible to blow the sub with that amp or do any damage to it. I have the level a pretty safe setting and make sure to keep the bass equalizer down, but i would like to get a little more out of it. Any insight would be appreciated

i don't really want to take up the whole back window up i did some measurements and i can do a box that's 52.5W x 24.5H x 16.5 deep. externally that's 12.28 Cuft 10.18 cuft internal. After displacements of the 2 18's and 3 6 inch aeroports that are 12 inches long each it gives it an internal volume of 9.083. will this be enough for 2 18's for bass racing the 140-149.9 class? i am ordering 4 Sundown 1500's when jacob gets the new ones in. i plan on strapping at 1.4 so each amp will see .7. i also will have 6 optima group 31 yellow top batteries.

I have a 15" Soundsplinter RL-p thats in need of a recone. Sub works fine, just the cone is starting to seperate from the surround. Tryed CA glue and it worked well for a while, but its coming lose again. I was wondering if a recone was possible for this sub. BTW, I sent a email to Nick a few weeks ago, but didnt get a response, so I decided to make this thread to possible get a solution. Thanks.

I ordered my btl a few days ago (fully loaded) and now it's time to buy an amp, what do you guys think of soundstream? The sub will be going in a 5 cuft pored box tuned to 32 hz Not trying to spend more than 500

I'm really considering using Fi subs for a new comp setup. Vehicle is a full size pickup, so it will be a blow through solution. The primary question is, which sub(s) to go with. Goals: 150db at headrest, 130db outside on music. It will be entered in MECA's spl and park and pound format. P&P being the 130db outside goal. The two goals are the max points I can attain for what I'm looking for. Obviously if it is higher that's fine. One individual at the 2012 finals did a 155/129 on 4 speakers in a wall (don't know brand and I think they were 15's). I was originally thinking of a single 18, but I'm not sure that will get there. Also, if possible, I'd like to keep the b…

Ok i need some help on picking out the amp for my Fi BTL fully loaded i have to amp choices tell me wich one you think is better or if neither of them ar good Amp 1. XT4000DE V2 1,500 watt RMS (4000w peak) mono car amplifier Class "D" fully digital power supply 4000 watts peak output 1,500w x 1 RMS @ 1 ohms 800w x 1 RMS @ 2 ohms 500w x 1 RMS @ 4 ohms Bridgeable Efficiency: 86 % @ 4 Ohms or 84 % @ 2 Ohms or 76 % @ 1 ohm Fully adjustable butterworth low pass crossover filter Low Pass Crossover Filter - Adjustable 40 - 250 HZ @ 24 dB per octave Adjustable Bass Equalizer: 30 dB Bass Boost @ 45 HZ Subsonic Filter: 15-…

I'm planning on getting a 12" Fi Q (dual 1 ohm with cooling, spider and heat ring) and putting it in a ported box and I am on the hunt for an amp to boot. I think I found what i want and its a Hifonics HFi1000D but i also saw a Hifonics HFi1200D for $50 more so i was wondering if its a good idea to go with the extra 200 watts and if i should just stay around 1000 watts since thats what the sub is rated at. http://www.sonicelectronix.com/item_23548_Hifonics-Brutus-BRZ1200.1D.html http://www.sonicelectronix.com/item_22705_Hifonics-HFi1000D.html edit: added the amps link.

Hey guys im wondering what a P chamfer is on the fi q. thanks for the response!

Hey guys, I think i'm going to be purchasing a Q12. I have reservations that I have the space for an adequete box though. I have a 2002 BMW 325i. Here are a few pics of the way my backseat/trunk is (borrowed from a bimmer forum): and i was hoping to have it look something like this when it was complete: As you can see the setup is geared towards a show car, but I do actually drive the car around quite a bit, so sound quality is a concern of mine. How practical would something like that setup be for sound quality? SPL doens't matter as much for me. Thanks

I have the following system... '96 Jeep Grand Cherokee 2 18" Fi BLs 2 Rockford Fosgate T10001's 1 Rockford Fosgate p500-2 1 Pair Infinity Kappa Perfect 6.5" components 1 Pair Alpine Type R Coaxial 6.5" Lots of Lightning Audio Wire Alpine CDA-7897 Head Unit + 6 Disk Changer 225 amp Excessive Amperage alternator Box tuned to about 34 hz My question is, I cannot for the life of me get my subs to play the same. They are phase, wired with 8 gauge, and the polarity is correct (as long as the subs are labeled correctly). I have the amps set for master/slave, set to give each sub 1400 watts. Does anyone know what could be causing this problem?

Right now i have a 15 d2 Fi BL its sick... but i cant leave it alone... soooo any opinions on the power handling on 2 Fi BL 15's? and any suggestions on a amp to run both of them on? im thinking about reconing my older Bl but its up in the air for now... so any opinons?

Hi everyone on SSA and Fi audio, i am new to this forum. I herd lots of good things about Fi audio, so iv decided to give there woofer a try. i plan on ordering one in a few weeks. im thinking im gonna get me a single 15" BL to start Fully loaded as a daily with 2ohm and universal option. Now my question is i need plans for an enclosure and also what should it be tuned to?..... I never tuned a box myself so i may need some step by step if its a complicated design. Thanks

I need some one to send me a template for a 15" Btl So i can see if i can fit them before i buy them. Also so i can get the holes cut for once they come.

thinking about running a second battery in the trunk. i was told there are two ways of doing this. 1, using a isolator and 2, running the + from the front battery all the way to the second battery and then ground out the negitive. are these both true? what should i do?

I have a 12'' Q with Bp and its powered by a hifonics 1208d. I was wondering if the amount of cubes made it sound different. I know it does but how much. I wanted to go with a 2.5^3 tuned to 32 hz. The only problem with this is idk if i will have the space. So would 2 cubes sound any different and how?

i need help choosing between these two designs for my 12" BL. my last box didnt turn out so well. so i was hoping you guys can maybe help me out a bit. amp:hifonics bxi 1606d goal:spl first design: H:14.25" L:30.5" W:18.25" port width: 3" total port length: 29.75 square port area: 38.25 box volume:2.9 cu ft (before double baffle) tuned to:34hz second design: H:14.5" L:30.5" W:14.25" port width:2.5" total port length:31" square port area:32.5" box volume:2.18 cu ft (before double baffle) tuned to 36hz any input is appreciated, thanks.