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View Full Version : Noob's got a couple of questions...



lifted95
09-17-2006, 08:13 AM
I hear everyone talking about daily SPL and competion SPL, whats the difference and wouldn't everyone want comp because it's louder?

Do you tune a box to the lowest Hz you can or is there a system to it?

The manual for my L5 says it pounds the best in a 6cu. ft. box yet I can find no one on the forum with that setup... am I missing something?

Thanks in advance.

luvinthebass
09-17-2006, 10:23 AM
you can tune a box to w/e hz you want then build the box design for that hz i.e. 35 hz then your box will hit most output at that hz.

Trixter
09-17-2006, 01:26 PM
I hear everyone talking about daily SPL and competion SPL, whats the difference and wouldn't everyone want comp because it's louder?

what is loud to the ear may not necessarly but loud on a mic. lower freq. can sound louder but higher freqs. tend to read louder on the mic. that's why people have a comp. set up and a daily driving set up.


Do you tune a box to the lowest Hz you can or is there a system to it?

generally speaking the lower you tune a box (28-30 is my perference) the flater the response curve will be and the better the sound quality. spl guys will tune to a high freq to get a sharp peak on thier graph and burp the sub at that freq. in either case, whatever kind of music you listen to, if you have peak on your graph, you would want to tune ~5hz lower so that peak area is in your music's range. see the pic for winisd graph samples. some box and sub, just different tuning freqs.

http://img230.imageshack.us/img230/8565/3528hzwinisdgraphzq3.th.jpg (http://img230.imageshack.us/my.php?image=3528hzwinisdgraphzq3.jpg)



The manual for my L5 says it pounds the best in a 6cu. ft. box yet I can find no one on the forum with that setup... am I missing something?

Thanks in advance.

probably...there are a lot here with that sub...you'll find someone.

xluben
09-17-2006, 02:01 PM
you can tune a box to w/e hz you want then build the box design for that hz i.e. 35 hz then your box will hit most output at that hz.

your setup will not necessarily have the most output at the box's tuning frequency.

the box will be adding the most output at that point. in a proper setup the tuning frequency is at a point where the sub has started to roll off, and the added response will allow the frequency curve to remain somewhat flat for a longer period of time (lower). this will give you more low end response. but in car audio applications the tuning frequency is often chosen higher to account for cabin gain or to increase peak output. you could tune to a point that would make the tuning frequency the peak output frequency, but that is probably going to be way to high for daily use (but is often the strategy for spl competitors).

lifted95
09-17-2006, 03:43 PM
Thanks for all your help, guys. I appreciate it.

Trix- What program is that? it looks pretty sweet for designing sub boxes.

I guess I have some more searching to do for that L5 setup.

MassOccur
09-17-2006, 03:51 PM
It's WinISD

here's a free download.

http://www.linearteam.dk/default.aspx?download=winisdpro

Railrocker
09-17-2006, 03:54 PM
Not to mention that "most" not all spl competition vehicles arent very musical. You wouldnt want to listen to them all day or even across town.

lifted95
09-17-2006, 04:16 PM
It's WinISD

here's a free download.

http://www.linearteam.dk/default.aspx?download=winisdpro

SWEET! Thanks!

Trixter
09-18-2006, 03:08 PM
Thanks for all your help, guys. I appreciate it.

Trix- What program is that? it looks pretty sweet for designing sub boxes.

I guess I have some more searching to do for that L5 setup.

yeah...winisd. honestly, it's not that great.

nVRuckus
09-18-2006, 03:30 PM
but remember winisd doesnt calculate the ports displacement so you have to adjust accordingly.