it all depends given the right enclosure and power I have heard 4-8's sound like 2-12's. If you do it right it should punch you in the back of the head nicely. The only thing you would be lacking is notes below 35htz. Ported would help you there a little bit but sealed would punch really hard.
do you think that 2 koda 10" would be better? Also, i have only had stock systems so far. Would there be a huge difference if i use either 4 8's or 2 10's? I listen to music from country to rap and i do not want to miss out on the notes. I would also only used sealed boxes with a 500 1 ohm hifonics amp giving 125 to each eight or 250 to each 10 with a more powerful am that i can do at two ohms giving 250 watts.
I think that i am going to go with eights. Overall it is cheaper to go with 4 eights then 2 10's, and i think the idea of using 4 eights sounds interesting. I plan on powering them with a hifonics amp. Also, what kinds of notes would i miss with eights, i am just curious because chances are i probobally have never head the notes anyway.
What amp would you suggest. I want something good that is not overly expensive because i just bought the car and that set me back A LOT. Please suggest an amp that is of reasonable price that will work with the eights, I think that i need a 1 ohm amp because it would be cheaper to get the 500 watts then if i do it at 4 ohms. Any ideas would help me out alot. Also, have any idea when the 8's will be available on acoustic-visions?
The 2 Koda 10s would be both louder and deeper than the 4 8" Kodas. There is a substantial difference in surface area between a 10" and an 8". Remember that subwoofer displacement and size doesn't work in terms of diameter, it works in surface area (square inches). Think of it like a rolled up water hose, when you look at the inside ring of that hose, the circumference of that inside ring won't be as long as that of the outside ring will have. 2 10" subs wouldn't be equivalent to a 20" sub, they actually have less combined surface area than a single 15". That's just how surface area works. The Koda 10" also has a longer throw than the 8" does.
I'm telling you, there is more displacement with the 10s.
Adire Koda 10" Sd (surface area)-53.32 in^2 Xmax (excursion) - 0.71", so it would be 1.42" two ways. 53.32 x 1.42 = 75.71 in^3 displacement 2 10" Kodas would displace 151.4 in^3
Adire Koda 8" SD- 29.45 in^2 Xmax- .47, so .94" two ways 29.45 x .94 = 27.68 4 8" Kodas would displace 110.73
2 10" Kodas displace more air than 4 8" Kodas. Whether the price difference is worth it is up to you, but personally I'd do either the Koda 10s or a 12" Brahma. 12" Brahma: Sd- 67.58 in^2 Xmax- 1.10", so 2 ways it is 2.2" 67.58 x 2.2" = 148.676 in^3. 12" Brahma would be close to the SPL of the two 10" Kodas.
You much better with figuring stuff then I am. What kind of displacement would i get with a brahma 15? Would their still be good sq? I listen to music from country to rap. I would be using a sealed box as it would be much simpler. Also, how big of a box would i need for a 500 watt amp? I have a 2003 monte carlo and would be open to using a more powerful amp if it would not strain my alt.