big difference between 8's, 10's, 12's, etc?

MrSo0h0o · Post by **MrSo0h0o** » Mon Sep 19, 2005 9:40 pm

so i have this free 8" RF HE punch ported sub running at 2ohms getting 300 watts from my mono xtant amp and it just doesnt seem to hit very hard. i would imagine 300 watts i would be able to feel it in my chest at least a little bit, no?

i was wondering if 300 watts with an 8" sub would sound a lot different than lets sat a 12" sub with 300 watts? does bigger cone area=more SPL?(noticeable?)

ridr4lif · Post by **ridr4lif** » Mon Sep 19, 2005 9:45 pm

First of all, http://www.caraudiocentral.net/forums/s ... .php?t=835
check that out.

How big is that ported box and what frequency is it tuned to? I, personally am not very impressed w/ RF stuff. I had 2 10's sealed and didnt like them.

But a 12" that handles around 300-400 should be a little louder.

tedd

MrSo0h0o · Post by **MrSo0h0o** » Mon Sep 19, 2005 9:50 pm

ya noobed me there rid4lif! but yea, i dont know what its tuned to cuz it was free.. i believe its a little bit over 1cu ft not sure. yea i know its a POS but heck its free.. just wondering if there will be a big diff with a 12" later on(no more car audio except for another new HU for me)

Ryan from Ohio · Post by **Ryan from Ohio** » Tue Sep 20, 2005 3:10 am

Heck yes. 12>8....

More surface area (Sd) usually will yield more SPL

smoker · Post by **smoker** » Tue Sep 20, 2005 4:38 am

it kinda like if you had a fat chic and a skinny chic on the high dive..........whos gonna make the bigger splash?

smoker · Post by **smoker** » Tue Sep 20, 2005 4:39 am

nothing against fat chics.........i have loved a few in my day.

Post by **GlassWolf** » Tue Sep 20, 2005 4:59 am

the larger diameter sub will have more cone surface area, and probably more Xmax, so it's going to move more air, but it'll probably require more power to keep good motor control.
Larger subs also tend to have a lower Fs, so you can tune a ported box lower and still have it hit hard. Once you get below the Fs of the driver with a tuned port, you basically lose any advantage to going ported because of the increased power required to achieve the same output level as you'd need to hit that output above the driver's Fs.

Robert Wollenberg · Post by **Robert Wollenberg** » Tue Sep 20, 2005 6:28 am

I think what you really need to be paying attention to is which sub is in it's correct enclosure. If you put an 8" in the correct enclosure compared to a 12" in a completely wrong enclosure, you're more than likely going to be better off with the 8". Even a POS in the right box can sound ok. Put a $1k sub in a POS box with holes, wrong volume, etc. and it's probably going to sound like crap. Enclosure is the key. Then all that other stuff about Xmas will begin to play a part.

smoker · Post by **smoker** » Tue Sep 20, 2005 6:30 am

santa claus is coming to town!

Ryan from Ohio · Post by **Ryan from Ohio** » Tue Sep 20, 2005 7:27 am

Lay off the sugar and the sugga mommas!