Time Alignment T/A Delay, etc.

[FoxPro5 5,000+ posts]

Well, I wish I had independent L/R level adjustment for just my tweeters...
When I measure the outputs of my tweeter amplifier at a given volume, the Left channel puts out more voltage than the right channel....

//content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

nG

Line driver?

 

[Megalomaniac 5,000+ posts]

On my particular head unit, under time alignment it allows me to make cuts on each driver as far as output voltage in db units, overall output, no independent eq.

 

[gunz4me 10+ year member]

Cougars! Or is that MILFS? Regardless, T & A on them is awesome....

Wait, don't tell me this is about time alignment..... /facepalm "Doh!"

 

[shaneb 10+ year member]

Well, this thread has been very helpful, thanks guys.

The main part that was helpful or maybe not, was the math on the Time Travel to Distance. I will be picking up a Clarion DXZ955MC soon and it's T/A is in centimeter segments also.

Megalo, would you be interested in helping me sometime in the near future with tuning? I am in Fort Worth. I'll shoot you a PM.

Now, with my questions.

How does delaying the front end, bring the subs forward?

To tune for a center image, being in review mirror center dash area. Do you stick your head in the middle of the car? If you are trying to achieve a center image in that area, then wouldn't it already be there? since that is the center point between all the drivers?

Or is the goal to "see" the center image there, while having your head in normal driving position? I don't think I want Shakira right in front of me, preferably under my rear view mirror.

Definitely going to have to bookmark this for after I get my equipment installed.

Does anyone recommend any literature on this stuff? I know there is a lot of stuff on the Net, but I am curious if there are any books that aid in achieving this goal in a cars acoustical environment and such.

Maybe just some basic Acoustics books?

 

[FoxPro5 5,000+ posts]

How does delaying the front end, bring the subs forward?

Because in a lot of installs, the sub is actually closer to the ears than the fronts (kick panels).

To tune for a center image, being in review mirror center dash area. Do you stick your head in the middle of the car?

No, because if you did that then there wouldn't really be a need for T/A. Moving your head lengthens the path lengths for the left-side speakers. Ideally, we all drive McLaren F1's or can build cars like Mark Eldridge which have perfect path lengths. Since we don't and can't we compromise with T/A.

Or is the goal to "see" the center image there, while having your head in normal driving position?

Yes, that's the goal...a holographic suspended center image with the stage to the sides of it at equal height and as wide as you can make it.

 

[Megalomaniac 5,000+ posts]

I am not interested.

 

[James Bang 5,000+ posts]

No mr. Sq to the rescue??

 

[Megalomaniac 5,000+ posts]

nothing personal. I just hate tuning. I only tune my car because I was not pleased with the way it sounded. I am not trying to make a career out of this at all.

 

[James Bang 5,000+ posts]

back to T/A.

*****Assuming you have the correct phase and equal balance between your left and right speakers:

The measuring tape method will not get you a center image right in front of you and not in middle of the windshield ( i don't say rearview mirror, because I took mine off).

Measuring tape:

The question now is: "how do we now get the center image away from the front of you, blocking the view of traffic, and move it to the center of the windshield?" .. so it can look like this:

????

 

[Megalomaniac 5,000+ posts]

you are confined to the boundaries of your speaker placement unless you gain some major pld's magically, which t/a cannot fix or reproduce.

 

[James Bang 5,000+ posts]

you are confined to the boundaries of your speaker placement unless you gain some major pld's magically, which t/a cannot fix or reproduce.

not w/ the exact same words.. but I think we've gone through that already. hence the pictures.

 

[atsaubrey 10+ year member]

I didnt read the whole thread but I know for a fact James and Meglo are up to no good by posting this up....you sorry pricks.

 

[Megalomaniac 5,000+ posts]

im pretty serious, not sure about jb

 

[James Bang 5,000+ posts]

trolling with positive outcomes //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Horsemanwill 10+ year member]

back to T/A.
*****Assuming you have the correct phase and equal balance between your left and right speakers:

The measuring tape method will not get you a center image right in front of you and not in middle of the windshield ( i don't say rearview mirror, because I took mine off).

Measuring tape:

The question now is: "how do we now get the center image away from the front of you, blocking the view of traffic, and move it to the center of the windshield?" .. so it can look like this:

????

well when you say correct phase are you meaning all pos terminals from speaker goes to amp and all neg terms from speaker goes to amp? because if so i have my mids out of phase with the rest of the system.