fozzz

iTrader: (1)

For the most part, no car will have perfectly equal pathlength right? Assuming your components are mounted in proper locations, how can you get a good center image from both sides of the car? A delay will help give you good center imaging from one side of the car, but not both? What are some tricks that will help you to get proper imaging from both seats? Personally I have never sat in a car that had great imaging on both sides (and I have sat in tonns of cars). Can it be done? I am planning on purchasing a P9 head unit (check my other topic) because it will give me atleast 1 good seat. But how can I get two?

Orion_95

Isn't that the million dollar question. Symmetry to an extent...(and I dont mean the rockford piece)

JohnVroom

Time alignment (you were looking at the P9)is a great tool for a single seat but it may make the second seat worse.

chev2

Haven't we gone through this?

It TOTALLY depends on how its USED.

Brian C

Three most important things are, 1.speaker placement, 2. speaker placement and 3. speaker placement. One factor to consider is reflections. Early sound arrival compared to secondary arrival helps us position things. remember that higher frequencies are shorter they are so you will have more reflections before they hit your ears so the speaker can be localized easier,(not good). if you want a more solid centre allow the inside of the tweeter to reflect and not on the outside. This will reflect in the centre and not the outside therefore the centre image can be stronger (better for both seats). You will see home speakers that are mirror imaged and you would put the tweeters on the outside to give a better centre image. There are a variety of materials that surround the tweeter in home speakers to get desired effects. Some are felt type materials and some are hard like Zinc. 20Khtz is .7" long and the wave length doubles as the frequecy halves. So that should help you get an idea of what frequencies will be reenforced if you allow them to reflect or not. That should give you a few hours of playing.

SUX 2BU

iTrader: (1)

One thing to take note of is that, at least in competition anyway, the 'center' image is allowed to be slightly left of center when listening from the drivers side and vice versa for the passenger side.

I've had systems that have had decently good centers using kick panels but the width seemed to sound different from each seat. I found the stage to be wider from the drivers seat than from the passenger seat. I also know that my hearing is a little one-side biased so that throws me off somewhat. IMO, a center isn't all that hard to acheive but equal width and depth are challenging.

Seahag

Using the 8 drum trak on the Iasca test disk,
I get 6 on the left side and 2 on the far right.
Very iritating. No matter what I do, It will not change.
I tried with the tweeter hooked up and unhooked.
With the tweeters its better but not by much.

And how do you get the depth "illusion"

Sorry to hijack your thread man.

Brandon

iTrader: (1)

Yea ,exactly, look at his truck carefully, where are his drivers mounted? Past the firewall near the front fenders...of course he'll get good imaging in that....it's the closest thing to a home set-up in a car I've ever seen in regards to the amount of space between the seats and the speakers....good imaging from both seats comes from makeing the path lenghts as equal as possible to both seats. When your speakers are mounted 4+ feet away from you it's pretty easy to do...well easier said than done because then you have to actually build it but, the concept is simple enough.

[ February 27, 2004, 10:54 AM: Message edited by: slingshot2 ]

Jaxom

Hey
In my earlier years I tried putting the tweeter and midrange under the seat faced to reflect off the dash towards the listeners ears. I found that some cars (Chevy Beretta and Astro) had very good sound field depths and were evenly matched from both seating positions. I think this was partially due to the shape of the lower section of the dash. I have also seen some other vehicles in magazines that have had drivers mounted in the floor firing straight towards the roof (Chevy Lumina sport in AS&S about 5 years ago comes to mind)
Maybe I should try this again in my car......