PDA

View Full Version : What is this box tuned to?



venom107
04-01-2003, 10:20 PM
OK my box is approximately 1.859 cu feet. It has a slot port on it. The port is a total of 12square inches. The port is 13 inches long. Any other info you need just ask I REALLY want to know what this is tuned to.

RMKrider1
04-01-2003, 10:30 PM
About 95 hz!!! What the hell are you running in that box?

venom107
04-01-2003, 10:35 PM
:eek: ARE YOU SERIOUS??? I'm Running an Alpine Type R in that box. NO WONDER IT DOESNT HIT LOW.

venom107
04-01-2003, 10:35 PM
:eek: ARE YOU SERIOUS??? I'm Running an Alpine Type R in that box. NO WONDER IT DOESNT HIT LOW. If I widen the port will it tune it down?

RMKrider1
04-01-2003, 10:40 PM
Thats what I got on winisd? Is the 1.86 before or after port displacement?

venom107
04-01-2003, 10:43 PM
Ok here's what i did. I was on ddaudio and saw that you could find the volume of the box so I took the entire width x height x depth divided by 1786 or something to that effect. I took the measurements of the entire box including the port. The port itself is only 1" wide and 13" long.

venom107
04-01-2003, 10:45 PM
I got the measurements for the box from a certified dealer. Why the heck would they tune a box so high. Is it just good for punchy bass for Rock? Cause I want the exact opposite of that I need low extension for Rap music. I wondered whey my 12" hardly went lower than my 10's. What can I do to the current box to solve the problem?

RMKrider1
04-01-2003, 10:50 PM
ha ha sorry we had a misunderstanding....I was thinking 12 inches sq. you know like 12x12 and 13 inches long. I got it know......1x12 and 13 long right?

venom107
04-01-2003, 10:53 PM
Exactly. So what can I do and what is the tuning on the box now?

RMKrider1
04-01-2003, 10:54 PM
ok ok your port is 1x12 and 13 long right? The tuning freq. is about 33 hz!!!!! Does that sound better? Sorry for the misunderstanding I guess I'm a ******* and cant read:D

venom107
04-01-2003, 10:57 PM
So is 33 HZ too low? Now I'm just confused. If I wanted to tune it to 45HZ how would I do that? ALSO VERY IMPORTANT WHAT IS THE DIFFERENCE IN SOUND BETWEEN 33HZ and 45HZ? Thank you for your help.

venom107
04-01-2003, 11:06 PM
Anyone know the difference in sound from 33Hz to 45Hz which is better for rap?

RMKrider1
04-01-2003, 11:17 PM
33 hz is a pretty good choice for daily driving!! Mine is 35-36. the differance between 33-and 45 is just what freq. it peaks at? For mostly rap I would say 33 should be just about right!!

Randy Savage
04-01-2003, 11:19 PM
45 is too high for daily driving...

Even 40 is a lil too high...

28-38 is good for daily driving

RMKrider1
04-01-2003, 11:22 PM
Hey nova man? Did you try his measurements with your program? Just curious cause I'm not sure I trust winisd pro anymore! Just wondering if you came up with the same numbers I did?

Randy Savage
04-01-2003, 11:24 PM
Originally posted by RMKrider1
Hey nova man? Did you try his measurements with your program? Just curious cause I'm not sure I trust winisd pro anymore! Just wondering if you came up with the same numbers I did? I need the T'S params for the Type-R, I don't feel like finding them though...got a link?

venom107
04-01-2003, 11:25 PM
thanks for the help. What does 45Hz sound like way too high just for max SPL in competition? Just wondering. What is the definition of daily driving? Why dont many people have their boxes tuned to around 45Hz?

Randy Savage
04-01-2003, 11:27 PM
Usually for SPL, you want to tune the box a little under the car's resonant frequency, this will give the best #'s...but won't sound good at all on the low end...

venom107
04-01-2003, 11:28 PM
Here's the link for the paramaters of the Type R.

http://www.alpine-usa.com/html/D2_n_1_n_n.html

venom107
04-01-2003, 11:31 PM
So thats why when your daily driving you dont want your box tuned high because there is no low end. basically just really high screaming bass right?

Randy Savage
04-01-2003, 11:40 PM
I got 33 Hz...

BUT..did you take into account the thickness of the wood?

If it's 3/4" thick, the box is only 1.33 cubes....

which makes your box tuned to 39 Hz...

venom107
04-01-2003, 11:45 PM
I didnt take into account the thickness of the wood it is 3/4". So its 39Hz. Is that pretty good or is there a way I could tune it to hit lower end? See I noticed that a friends Audiobahn 10's in a bandpass went lower than most 12's even some 10's. Is it because it has a lower free air Frequency response? I just want lower bass. Something that will make my nose move, More. Would another 12 in the same box make that happen?

jbl_marshall21
04-01-2003, 11:54 PM
Originally posted by venom107
See I noticed that a friends Audiobahn 10's in a bandpass


eeeeewwwwwwwwwwwwww


another 12' won't help get the lows in that box

venom107
04-02-2003, 12:01 AM
What should I tune my box to, to get lows in a box for my type R's? What should I tune it to? How do I calculate port tuning?

venom107
04-02-2003, 12:10 AM
If I'm hitting 39Hz how do I lower my frequency?

bigred78797
04-02-2003, 10:14 PM
Personally I think 35 hz is too low for most rap. I listen to alot of rap and while some songs hit hard most don't most of the rap song that i heard seem to have beat burst at maybe 38 or 45 hz. Now don't get me wrong there are some songs that hit REALLY hard in a low tuned box but for most rap i would go slightly higher end. If you want to hear really low end bass i would do like i did and tune my box to 25hz and pop in some bass mekanik cd's. But that's just what i did. :rolleyes:

venom107
04-02-2003, 11:12 PM
I tuned my box earlier today to 33Hz, it was sitting at 39Hz. I noticed a lot of difference between the two. I have to disagree with you that rap hits harder at higher Hz. My sub now picks up those really low notes that I like. I guess its just a matter of taste. At least now I know what to do to tune it right.

RMKrider1
04-02-2003, 11:16 PM
Right on man!!! I'm glad you got it figured out and are happy with it know

venom107
04-02-2003, 11:19 PM
I was surprised how easy it actually was to make that much of a change in the sound. I just took the port wall from my other box that is exactly the same and nailed and sealed it to my other box. I could have tuned it to 27Hz but I wasnt sure how it would sound. Alpine does pick up those low notes.:)