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I was just getting ready to say the same thing. The formula they used is to find the area of a circle. Unfortunately you can't calculate cone area by finding the area of a fixed number (8, 10, 12, etc), since only a portion of the surround is considered "cone area" and two different subs will not necessarily have the same physical dimensions. The cone area (Sd) for a loudspeaker is accurately stated as: Sd = (Pi * D^2)/4 Where D is the diameter of the cone plus 1/3 of the surround at both ends of the measurement.* *Some manufacturers will use 1/2 of the surround instead of 1/3 for the measurement, which would make the Sd of the driver appear larger. So in reality, the Sd listed by two different manufacturers is not directly comparable unless you know the same method of measurement (1/3 or 1/2 of the surround) was used for each driver. For example, a 12" Fi BTL has an Sd of 480cm^2, which is 74.4in^2, which according to the chart is less than the Sd of a 10" driver. Work backwards to find the radius, sqrt(74.4/3.14) = 4.87in. Which means that the effective piston diameter of the driver is only ~9.75", not 12" as the chart would want you to use. And if the BTL had a larger or smaller surround, then it's Sd would decrease or increase, respectively. Which means that, unfortunately, those charts are pretty much useless

The loudest will be the setup that gives you the most capability to have maximized your excursion and cone area per volume that you have available for you box. There is NO generic answer to your question and even specific answers might require testing although someone who is capable with modeling could determine it as well (and no I don't mean some jackass with a copy of BP6 as cabin gain is by far the hardest portion of the equation to model).

No the cooling option are machined channels in the motor, by default the bl has a plugged polevent

old Q for reference, Q is on the right (havoc on left)

Look what arrived today Thanks to SSA for excellent customer service. Tracking # was sent within hours after I paid, and the speakers arrived in great condition. Can't wait to hook these up! Stay tuned for a review

If you look really close in the vent gaps where the Spokes are coming from you should see on the former written in sharpie ssd or q then the impedance of the coil, get a small flash light and inspect it all around

Too bad the charts are completely wrong. They are calculated assuming that the entire diameter of the sub is usable cone area when that isn't nearly the case. They don't even really give a ballpark comparison between sub sizes either since a 1" wide surround on an 8 will have a much greater effect on Sd than a 1" surround on a 12.

I would say yes, an spl could play music. Could it win an sq comp... prolly not. why dont you tell us hat you know, and well tell you if your right. rather than having someone write a 10 page paper and wasting space. Just a thought.

That is awsome. SSA FTW

Found my solution. My dude "phi" on here is hooking me up with a fresh reconed BTL for a nice price and I'm going to be picking it up. He may also be building my enclosure as well and save me a S-Load on both deals Woohoo!

You are dumb. Period end of story. Your not competing in any drive by event, you simply want people to know your shit is loud and impress them. Well no one cares. You should just mount your driver on the outside of your vehicle and then it'll be louder OUTSIDE then INSIDE. noob.

I'm going to shoot some really nice pics of this thing to post on our website tomorrow Andrew

Andrew

Andrew

2000-4000watts so i guess itll be perfect might be on the higher side just have to send clean bass to it and it should be fine That's an incredibly dumb thing to say. Ahh 2000 to 4000 whats the difference... Might be on the higher side... Fi doesn't list rms as 2000-4000, you made up 4000 being the "high side". Just because the signal is clean doesn't mean it won't destroy the beefiest drivers. P.S. go ahead and -1 me for stating my opinion Oh and is this for daily or burping? 4k on a btl for burps is a whole nother thing

Wow. Please tell me your like 14 years old or something because if you were any older, you shouldn't be allowed near plastic bags.

Douche bag /Thread.

It's not the subs fault at all. I'd take a BL over a w7 even if the BL was 100$ and the JL was free. Like people were saying, why do you care if it's loud on the outside? I mean who gives a flying fuck. If people cared about the outside then they would have subs and crap mounted on the outside of the car. All you hear on the outside anyway is just a bunch of rattle. Plus, you probably just want it loud on the outside so you can piss off the guy next to you and you and your little tike friends will just have a little giggle orgy.

I'm still surprised you haven't been robbed yet.