Time allignment question

[jntar 15]

OK tell me if this looks correct.

TD=time delay

A=distance in feet from ear

1132ft/sec=speed of sound

1000=ms

TD=(A/1132)*1000

Left=2.2ft

1.94ms=(2.2/1132)1000

Right=4.6ft

4.06ms=(4.6/1132)1000

4.06-1.94=2.12 TD

Does this look correct? I found this formula on ECA, I am having problems finding other formulas on the topic.

[ngsm13 1]

There's some type of formula in my Alpine 9835 Manual...but I'm at work and I can't view the damn downloadable manual. But it seems right from what I can remember...

NG

[jntar 15]

Found the mesurments in the eclipse manual.

Manual...

A=TD

B=furthest speaker

C=speaker to adjust

Formula

A=(B-C)/34

My case

1.5ms=(172.7-121.9)/34

[Supa_c 1]

In pioneer H/U's you just measure the distance and put it that measurement into the H/U

Is it different than what alpine/eclipse do ?

[jntar 15]

In pioneer H/U's you just measure the distance and put it that measurement into the H/U

Is it different than what alpine/eclipse do ?

<{POST_SNAPBACK}>

yes, eclipse you have the millisecond delay and the DB level adjustment for the left and right channels for highs, mids, and lows.

[Supa_c 1]

Good ol pro mode.

Pioneer uses the distance for pro mode as well

[jntar 15]

Good ol pro mode.

Pioneer uses the distance for pro mode as well

<{POST_SNAPBACK}>

eclipse has preset for normal mode. Ex. left seat, front, right seat, rear.

pro mode is broke down like my previous post.

[Supa_c 1]

Pioneer you choose the seating position.

say left seat front

then you measure each speaker for the left front same goes with the right.

You cant do the custom t/a with all seats or both front seats selected. Just the preset ones

Its a bit better than what eclipse offers for normal mode.

Thats only in the higher end units. The regular one is just like what eclipse offers.