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Posted

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.

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

  • Author

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

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 ?

  • Author
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 ?

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

Good ol pro mode.

Pioneer uses the distance for pro mode as well

  • Author
Good ol pro mode.

Pioneer uses the distance for pro mode as well

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

pro mode is broke down like my previous post.

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.

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