Hell-Razor

Is it a no no to tune below what they recommend? I think the 15" BTL is rated for 30-35hz tuning. If I tuned mine to say, 28hz would I be doing something I shouldn't? (Just a thought) I want to be doing dB / bass races (is there a difference?) eventually with this car. I will probably start... eh towards winter and head around a few states close to Wisconsin. I know Chicago has a bunch of them but then you go against the big dogs there (and yes I understand there are categories). I want to turn heads with this sub (sound good) but I also want to be able to do decent on the single sub single amp category. Are these two different thing though? Quality vs good competition status?

Basshead -- I checked out your Box Tuning Calculator, its pretty sweet i will definitely use it in my build! Except I don't think I am going to make mine the average box so to speak, I am thinking more of a L shaped box with the woofer facing up and towards the driver and the magnet facing out of the box and down towards the street at about a 45 degree angle. I hope I can still use this calculator... And what does tuning the box say to 30hz vs 40 hz... or 20hz vs 30hz? Is one "louder" than the other? Or is one more SPL vs Daily? I don't know I am still trying to learn about all this stuff. Any help would be appreciated.

So technically its all about the box?

If its easy to hit well over 140 dB then why are there only like state records and national records of 160dB? Also, how is the install everything (or 50/50 in Earsplitter's terms)?

This made me smile if its truthful. I hope to be able to break 110 dB once I get both of my amps strapped to my 15. But still, is it most likely his in car speakers doing that? Or is it his sub?

Alright lets see here, just a quick overview of what I am going to get to make sure I didnt screw up -- Amp - Sundown SAZ-2000D - http://www.soundsolutionsaudio.com/store/p...%252dorder.html Amp Kit - Fuse 300A - http://www.knukonceptz.com/productDetail.cfm?prodID=KFX-PK0 Sub - Fi BTL 15" - https://ssl.perfora.net/www.ficaraudio.com/...view.shopscript Big 3 Wiring - http://www.knukonceptz.com/productDetail.cfm?prodID=KFX0BK Should I get more of this to help me daisy chain my batteries together? I am looking to get 8 feet as of now... Battery - Dont know the name but it has 1125 Crank Amps, should be enough (I hope) The only thing I am missing is a deck. I need a good deck with an awesome equalizer... Any suggestions?

You read my mind, I just got on to ask what fuse I would need. Ordering process should start...next week =)

Do I have to buy special connectors? Should I get one of those fuse boxes that allow you to easily (or so it looks) connect several lines to one terminal?

Good luck, I am curious on how well it will go. Post your results and what you may have done better / different. I am in the same boat, I am hoping to jump into these competitions with a single woofer (still determining size based off of my budget).

For an amp install kit I was looking at either of these - http://www.knukonceptz.com/productDetail.cfm?prodID=KFX-PK0 http://www.knukonceptz.com/productDetail.cfm?prodID=KLM-AK0 Are these what you guys are talking about when you install the big 3? http://www.knukonceptz.com/productMaster.c...ry=Power%20Wire

0 gauge wire for the big 3? Or 0 gauge wire for connecting to my amp? I am still not quite sure what to use for that...

Where would I buy these lines?

Oh thats it?! I thought it was something like a three different type of batteries linked together

Could somebody also explain what the big 3 is? I have been reading up on it but it doesn't say what it is exactly...

Alright. It looks like I am going to have a very hard time getting a 18" to fit in my trunk. The killer isnt the width or length, its the height. So I may be backing down to the 15". It says on the website that the RMS is 2000 watts, same with the 18". Can it still handle the power if I were to get a Sundown SAZ-3500D Or 3000D? Or would it just be easier to get one SAZ-2000D and if I want more strap another amp on. If I were to go the single amp idea, would I get a 2 or 1 ohm sub? I would think if I got 1 ohm and I wanted to strap another onto it I would get more bang for the buck because it would then cut it to under 1 ohm and double the power... but this is out of my knowledge.

I found a group 31 battery at a battery store by my house. It has like 1125 crank amps (I think.... crank something) and is like 150$ give or take. Would two of these do the trick for a 18" or one for a 15" and keep my old battery? I am just wondering what kind of crank [amps?] I would need and whatnot. It is a deep cycle battery he said and is made very well. I am not trying to out think you guys or anything like it. If you give me a minimum for numbers Ill try to go above and beyond when it comes to specs.

I'm going to be working hard on it. And I agree I don't want to throw as much power as I can into it (yet). And I don't have that much money. I keep on having to spend it for personal reasons. My budget is still around 2 grand though. I was going to get two 31 group batteries (that's like 800), a SAZ-3000D it sounds like is good to power (900), the BTL 18" (if it fits, another 500). Shit already over my limit. Well see though what I can do to work my magic...

BTL. Mind changed.... And if it can support more, about how much more? Would I want to be throwing 4k watts at it (Thats what two of the amps bridged would do...)

Alright a couple of questions here... 1) I looked on Fi's website about the RMS needed for the 18" and the 15" woofer and it seems they both require 2000rms watts total. So why wouldnt a signle SAZ-2000D be enough for the 18"? My understand that this amp is enough for the 15". Right now it looks like if I have room I will get the 18" with a single SAZ-2000D amp and if I need more power (sounds like I will from other posts) I will get a second one when I can. 2) I was looking at the dB race's website and I see a section for 10", 12", 15" but not 18". If I were to get a 18" would I be disqualified / tossed into the custom class and be gonig against people who have too much money to throw into car systems? (kidding) 3) What would you guys recommend for gauge wire and from whom should I get it from? (online) Anyway I am going to start posting pictures on the website for my box. I have a few designs about the same cubft just in different shapes / designs and one is fiberglassed (shiney jet black) and the other is natural wood.

Doh. I read that page like 10000 times but always missed it.

Is it hard to tune the box if its external ports? Or even possible? I would like trunk space for things. I am kind of a clean freak and when it comes to out of sight out of mind I am completely for it. How is something like 25x35x15 ( L W H ). Will come out to about 7.56 cubic feet. Not including bracing and everything for the sub. Should bring it down to about 6.5-7. I know this is within the range but would you guys recommend more of a "box" shape than say a triangle or a rectangle? I am leaning more towards the 18" now (I know I was talked down but my mind got the best of me). Then getting a good amp to power it decently until I can get another and bridge it.

Thats awesome news! Well it means I wasted an hour and a half drawing up a design but hell thats alright. It means that I can have some of my trunk space. I need to go read up more (obviously) but whats the maximum cubic feet? I know reading the thing it says 5-8. Does that mean the max is 8 or the ideal is 8? and the ideal smaller is 5?

Alright random question, what are the dimensions of the 15" and 18" BTL woofer? Just wondering the L,W,H of it is all. For my box so I can figure in the displacement and how I am going to mount it without the magnet hitting anything. I wouldnt think the magnet (that side of the woofer I mean) would be moving at all, so not much space would be needed to allow for "wiggle room". Maybe an inch or so for vibration (am I correct on the assumption that side of the woofer will not move?)

Alright I kind of half ass designed a box sitting here during work. The measurements are 30 x 38 x 18.5 (L W H). This would give me about 12 cubit feet of space inside the box if I did the external port. Would this be too big for a 15 BTL? If so how about an 18 BTL? The port area on the box (just adding a front port, not side / top at all even considered yet. Nor am I adding the Fi BTL that I am going to carve into the box for additional port) . If I were to make the ports normal they would add up to be around 6 cubic feet. Again is that too small for a 15 BTL or 18 BTL? NOTE: I have decided my design ( no matter what size woofer I get) the magned will be mounted outside the box.

Alright I think I understand.