I was just reading my manual for my Alpine 9831, and this time correction seems really cool. Does anyone have the numbers to punch in for an xb for components in stock speaker location? I want to punch it in on i personalize and check this out..

 

oh man, i'm looking for those too. I just haven't found the time to go measure, plus inputting them is a pain on my processor.

 

I would go outside right now and measure, but I dont know exactly what im supposed to measure...

 

I also have an Alpine 9831, but have yet to sit there and measure the distance between the speakers.

Actually, to make life a million times easier, you can visit the i-personalize website and punch in the settings there, then burn them on a cd-r and the headunit will adjust itself to it. Easier then having to use the head unit itself which is a pain...

http://i-personalize.alpine.com/nam/index.html

 

yes, i was aware of that, im just not aware of how to measure it.. also would u guys recomend using the filter on the amp (80hz, 18db) or one on the head unit (12db, 80hz, 120hz, or 160hz)

EDIT: I was just talking to someone who I think is knowledgeable and he is telling me that time aligning the speakers is pointless since its the tweeters and woofers are far away from each other. They are in the stock tweeter/speaker locations..

 

IMHO time alignment is pointless if you are severely off axis from the speakers. I have tweeters in the dash, 6.5's in the doors and two 12's facing backwards in the back of the xB. I've set the time alignment both by measuring distance and by ear, and generally it doesn't seem to do much of anything except change the phase characteristics of the speakers. In most cars with speakers in the stock locations, the sound coming from the left speakers will be out of phase with the sound coming from the right speakers. This is especially true of the xB with the door speaker locations being so low. The sound isn't out of phase 180 degrees which would cancel out the sound completely, but it is still out of phase to a certain degree. If you were to fabricate pods that aimed the left speakers directly at your left ear, and the right speakers directly at you right ear, then setting the time alignment would be of great value.

The distance between the tweeters and the woofers is another story:

If you only have two channels of time correction for left and right then the speakers do have to be right next to each other or the woofer and tweeter have to be equidistant from your ear.

If you have four channels of time correction for left high, left mid, right high, and right mid the speakers can be any distance away from you and each other.

They still have to be pointing directly at you for it to work effectively though. (I think.)

 

so does the alpine 9831 support time correct for left high, left mid, right high, right mid

 

I have the 9835 and it has the same thing. You need to take it to your local Alpine distrubtor and they have a special measuring tape from Alpine to correctly adjust the time correction. You can also try calling Alpine to see if they will give you or sell to you the measuring tape.

 

I think the 9831 can be configured for left high, left mid, right high, and right mid. It has front and rear outputs + subwoofer outputs so:

If you are willing to run without rear speakers you can do it.

You'll need to bi-amp the sepearates running a small amp off of the front left and right channels to power the tweeters. To power the mids you'll need a larger amp connected to the rear left and right channels. Leave the fade contronl on the deck set to 0. This assumes your component set is cable of being bi-amped. There is usually a jumper on the crossover network as well as 2 sets of speaker inputs. If the deck had a 3 way crossover (as in the Alpine CDA-9835), you could skip the passive crossover all together.

Alternatively, you could buy on of Alpine's processors that has a built in crossover, eq, and digital time correction for many channels.

 

i guess ill just forget about the time correction, im not doing competition so everything is fine for me, i figured since it was there, i would do it, but it seems like its too much work. Since im using the crossover boxes that came with the speaker, do I even need any hp filters on the amp or head unit?

 

If you are running a sub I'd use the built in 2 way crossover on the deck. If its variable I'd set it at around 80hz and see how it sounds. Mine is set at 60hz and I like it there, but its all a matter of what your looking for. Some people set the high pass filter at 100 or 120hz to protect the woofer and the low pass at 80hz to keep too much midbass from playing out of the sub, but if your front mids can handle it I'd set the high pass a low as you can. It helps anchor the bass in the front of the car.

 

I have the IVA-D900 in my xB.
Stock Components and 3 10's in the back.

I did a lot of trial by error with my time correction feature.

I eventually came to the conclusion that the rear speakers were worthless and should not be apart of the equation.

I Delay my drivers side door speaker between .9 and 1.1. To me it make it sound like the sound stage is directly aimed at your head. For every little bit you delay the speaker is sounds like you ae moving it further from you until it seems like they are equal distance apart. I tried measuring the distance from each speaker and doing it that way but the xB's front components are so much more powerful that the rear it's pointless.

I plan to get two pair of focal utpoia components and fabricating my rear door to fit the comps. Then I think I will get the full effect of the time correction.

 

back on i-personalize, i was looking at it online and there is parametric eq settings. Is there any specific settings on ther to set to make it the best sounding. Also what does the low pass filter use. Also what I have noticed with my infinity perfect 6.1 components is, without the hpf on 80hz, there is a ton of bass coming out of the midrange speakers, but its really a little distorted if u ask me.. If I set it on 80hz, there isnt enough bass. Is there a way to make the bass sound clearer? I would think it should be close to perfect.

 

What do you mean use?
Turn the bass level down to like -1 or what ever you feel comfortable with. When you set the low pass filter on anything 80hz and below will be filtered out. That's why it's good to set your low pass filter to your components and have subs in the back to play 80hz and below. This will make sure your components don't get unwanted frequencies that might damage them....

Or it's the total opposite.....Either way you get the concept.....Come to think of it my sub amp has a low pass filter and it only allows from like 120 and below.....
Mybad I didn't mean to confuse.

 

You would set the high pass for the components and the low pass for the sub. Set the low pass for the sub at 80 to start. popalock85 sounds confused about high and low pass filters.

High pass filters allow frequencies ABOVE a certain point through and a low pass filter allows frequencies BELOW a certain point through.

 

Why dont you buy a tape measure and take the time to measure it. It'll take 10 mins max. Then log on to alpine-usa.com and click i-personalize. Then enter your measurements from the speakers to your ears. Burn them onto a cd and load them onto your cd player. Its not that hard. That way the measurements are exactly right from where you sit in your car not where someone else sits.

 

yes I could do that lilman, the thing is I was told I cant since my tweeter and midrange speaker arent next to each other, it wouldnt work

 

I know what you mean. We all have component speakers, this is what you do. Measure in between the two speakers and take that point in the middle of the tweeter and woofer. I called alpine on this.

 

Its not a regular measuring tape that is used. Alpine has a special measuring tape that is used for time correction. Your local Alpine distrubtor should have that tape measure. There are 2 in my area and both have it.
The easyest and most painless way to do the time correction is with help from you local Apine distrubtor ... Thats what I did with my EQ and Crossover settings and I haven't looked back since!