T/S Parameters

[shizzzon 461]

Are these parameters taken on the subs when they are freshly new or taken when the suspension has loosened up?

And I am referring to Fi subs.

Edited February 29, 2008 by shizzzon

[Acidburn 10]

Are these parameters taken on the subs when they are freshly new or taken when the suspension has loosened up?

And I am referring to Fi subs.

After it has loosened up.

[shizzzon 461]

Well, then i have questions...

On the 10" BL, since it's Fs is rated over 40hz AFTER it has loosened up, why would Fi suggest tuning as low as 30hz? I want to tune 3 of these 10s to 35hz but still like it to drop down to 30hz, and of course be able to reproduce that sound. I am just leary that it won't. I know Fs does or may have to do with SQ as well, but sq comes into play when i want it playable.

I need loud but i need my lows as well.

[johnecon2001 82]

The BL's will hit 30hz just fine. If you want LOUD 30hz... step over to the Q.

[shizzzon 461]

you know man, i understand what the difference between the two is now since you say that from experience with other subs lacking in low end...

But for my install, i will be facing sub AND port forward in the car.

I know that loses a ton of low end right there. Do you think i still have a chance of having the Q reproduce that low end still tuned at 35hz or should i just stay with the BLs?

I am fully aware of the loss i will have with facing everything forward but i have had an install like this before so i know what's lacking. I am also aware when i had an install like that, that 40-52hz was breath taking, i liked that a lot.

Mainly what i mean by experience is, it kinda sounds like a sealed box in a small enclosure trying to play low bass. As long as I can audibly hear "some" low bass response out of the BLs in the low end range facing forward then i'm alright. I already knew what to expect when facing forward so the ultra lows are not a goal, just equivalent to what a small sealed box sounds when it tries to play them.

so whatcha thinka? The BL win in this scenario?

Edited March 1, 2008 by shizzzon

[johnecon2001 82]

You'll probably need to tune a bit lower to make up what you may lose by porting and tuning forward. Can you fit a box tuned at 29-30hz in your car?

[shizzzon 461]

nope, I was gonna tune at 33 but ports too long.

I'm going to be using 4 4" diameter ports and required length at 35hz is 29" long per port!

I only have like 20" total internal depth but i am still tinkering in AutoCAD to see what i can come up with.

The box size is 3.5cubes NET. Just checked, goin down to 30 would increase em another 11" per so that's a no go. I can try to increase internal volume to allow a partial drop in length but it's still not enough to fit, even at 35 without some more tinkering.

[johnecon2001 82]

Thats a bummer. Can you go subs forward and port back by any chance?

[shizzzon 461]

if i did, i'd have to cut my amplifier power by half.

Try to picture this if u can.

This is the best setup i have drawn out so far so if anything new happens then... well that's irrelevant for right now.

Powered by a Lanzar6000d - 4,800w@1ohm. with 5 HC600s in the back of the car side by side.

Right in front the batts is the box, taking up the entire width, depth and all but 3 " of height in the entire hatch area.

I've done so many drawing in CAD, if someone owns a Scion tC i can guarantee i can tell you a way to fit something if it's possible by now, hehe.

When i drew a design with port back, i placed the batts in front of the box and had the subs facing up. But to give the ports room to breath after exiting the box, i'm lookin at only being able to fit 2 10s ported but i cant run that kind of power 2 10" BLs so i ditched the batts in that drawing and came out to like 2 10s off of 2,000w of power. It's a nice setup, indeed, but i've had setups like this before and know what they can do and want to do something different this time.

When i go to order these subs in a month or so, i should just place one in a test box i have and face it ever which way i want and see what appeals to me.

Another big plus with firing forward is less external vibrational noise. That saves in sound deadening headaches.

And another plus is for show offs at local car clubs. I havent been to this one car club i normally went to in like 3 months. They know i'm workin on a new setup and they always love for me to stop by because i got the stereo on wheels to put in simply, hehe.

The guy who runs the car club went to a couple comps but he's clueless in that field but he did it for fun anyway just to say he did. Me and him are buds and i want to build something that stands out. Something that just makes my mouth drop and i believe firing forward will dominate the 40-50 hz range since that's where most of the punchy bass comes from. I may not be able to hear it inside the car but on the outside, if the low end can be heard then that's just as good for the shows.

But, I'll see when that time comes.

When my car got broken into a couple months ago, they stole my vid cam. So when i get all this stuff installed, i gota go buy another vid cam to show you guys what has been built.

I like to do plenty of vids and tests for myself to keep logs of what does what in what install so when i ever build another design, i know what all my other ones were like.