Thanx for this elaborated answer Robert!
I thought that I was enough clear when I said what I would like to compare, I said: "12" TC Sounds driver (TC1000), 600W rms of power, and a ported box tuned to 25 Hz (assuming that the frequency curve is fairly flat until 30 Hz before any roll off)".
But anyway, I was sure at the same time that I was not enough clear
so Im gonna explain more what I would like! :D lol! So here we go:
Well... in term of frequency response, I like bass when it is flat in a large band of frequencies. I like to feel as much kick (mid-bass) than very low bass. So between 25 to 80 Hz or so, I would like it flat then under 25 Hz it can roll off.
With a ported AND sealed boxes I am able to do so in my room. I have a very small room (1500 cuft), all wooden except the ceiling. With a sealed alignment, I must use often a Qtc between 0.6 and 0.7, depending of what woofer I am playing with. With a ported box, in order to do this, I build it a bit on the small side, with a tuning of 22-25 Hz depending of what woofer I use so the frequency curve almost look like the sealed one BUT efficiency is better down low. I did a ported box like that with an Ascendant Audio Assassin 10 and it sounded almost like a sealed box but with more SPL, it was punchy and could go low at the same time, it was unbeleivable!
HOWEVER, despite the frequency curve of my ported boxes looking almost like those of my sealed boxes, its rather IMPOSSIBLE to have the
same looking frequency curves for both: i.e.: 6 more dB anywhere on the top of the sealed boxe. Above 40 Hz, they begin to be different from each other so the ported boxes have less mid-bass gain.
So this is where my goal come into play! What I would like to have is a box which is more efficient than a sealed box or why not a ported box with a frequency curve which is like an
"offset" of what we can see with a sealed box or a ported box so for example a 4dB gain everywhere from 25 to 80 Hz.
A PERFECT example of what I wanna say is right on the "Wicked One" page. You can see in the graph that vs a ported box, the Wicked One has more power over a WIDE frequency band. This is what Im seeking for: efficiency.
So what is my room and my car? My room oh.. I think that I said it its a 1500 cuft room, rather squarish so I use an EQ to tame the bass around 40 Hz (the famous room mode of those kind of room). Other than this peak I have, any other frequencies are almost sounding equal (+/- 1 dB!!!) except a little valley in the mid-bass region. This is perhaps because of the shape of the walls and how a window is deep vs the main back wall (so there is like a hole there). An irrigular room is often better than straight rooms which are strickly rectangular! :)
And my car... it is a Cobalt SS Supercharged 2007. The trunk opening is small, however, inside the trunk, this is surprisingly large! I will have to see if I can squeeze 36" of "wideness" in there!
And for the kind of music, to me, it doesn't matter. Most people who listen to rap and techno like the bass more lousy and boomy and people who listen to rock like the bass dry and very tight and chest thumping (mid bass heavy) but Im not like that. I like only ONE bass, bass that is even as much at 55 Hz than it is at 25 Hz. I like to feel it as much in the chest than feeling it in my ass in home when the floor is shaking badly. I listen to about anything! So if a 40 Hz note is not enough loud in a hip hop song for example, I dont make an enclosure so the bass is more powerfull around that, instead, I just turn the subwoofer volume knob more to have the same effect, but with a kick in the chest which may come after, as much louder too! ;)
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The difference between Decwares and ported/sealed (Read 17871 times)
