These were just different configurations that I can fit in my small trunk. The 8's (or any smaller sub) have comparatively small sized enclosure requirements per unit of cone area, which offsets the decrease in efficiency compared to one big driver that is perfectly coupled.
I don't think I explained anything that people on here that people wouldn't be able to easily find out elsewhere if they so pleased, but the point of these 3 comparisons were for ME and my actual system and the system I am building in the future. I was seeing what all I could fit of each size of the SA series (sticking with the series I know best) and just in case somebody didn't know what all of it meant, I explained it. I shared it considering I actually had it typed on notepad. It seemed more beneficial to share than doing nothing at all with it.
Drama queen..
Haha you were just my target at the time to mess with.
My degree was in Physics. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif As far as needing help in the future unless it's for reliable brands and experiences with certain products I suggest you put your technical background to work and come to your own assumptions/knowledge. Once you start delving, car audio gets hairy pretty quick and everyone has an opinion which may or may not have any substantial backing.
Yeah the forum is sometimes really useful because things don't always behave as expected in the real world. And some of the stuff I'm just not so aure about. Like I know wiring at very low resistance increases the current draw proportionately more so than the power, but don't know if SQ is affected significantly by going from 4 to 2 ohms on speakers or going from 2 to .5 nom impedance on subs. A lot more too. And opinions seem to help steer me in the right direction. And reliable brands / experience with certain products is a big chunk of what i ask about anyway haha.
Real world tests, cone area matters. thats why two 12s will be louder than 1 15. two 10s louder than one 12. A wall of five 8s will be almost equal to a single 18 without requiring as much cubic feet. You have cars going from a 16 cubic feet net wall with 4 15s (706 in ^2) swapped with 16 10s (1256 in ^2) in the exact same wall specs and they gain a large amount of output from the increase cone area and cooling. Multiple smaller subs will almost always be louder if you dont run into phase issues (not a big issue most of the times from the builds i've seen)
That's exactly what I was saying though haha. Preaching to the choir. The whole point of this exercise was to give myself a visual aid on what I can fit in my trunk, and it shows that smaller subs can give you more cone area in a given small space because they require less volume per unit cone area. I'm also weighing cost though and I'm also worried about phase cancellation. I'll at least be trying to keep the subs very close to each other to help with that a bit.
I'm much like you, very interested in physics, some math (high level calculus excluded lol), and a lot of science. Not a physics major, unmanned aircraft systems major, but anyways. Take it from me, someone who thinks like you, that you're over thinking it. We learned the same equations, and I'm sure a lot of the same material although I did learn a lot more about aerodynamics (I go to an aviation school, kinda makes sense). While they're great for understanding how these things work, that's about it. You're not going to get any accurate results without worrying about a multitude of factors that you'll never be able to accurately measure imho
It was just more of a nifty little exercise to be honest haha. Trust me I know these calculations are zero percent likely to reflect real world results. But the theoretical calculations, assuming a fantasy universe where nothing goes wrong and non-acoustic factors don't exist, are pretyy much solid. The numbers here were just sufficient enough for me to have a visual aid to somewhat help me weigh the costs/benefits of a few options, that's it really
