Let's talk about time alignment!

[WOOSEY]

Having the sound from all speakers reach your ears at the exact same time doesn't certify that the result is perfect. Phase coherence is necessary and only achieved through acoustical tests.

and with the right slopes... But then again, perfect phase is impossible in a vehicle...

When your drivers are aligned well, phase should be pretty good, since the impulses arrive at the same time.

You can always integrate all-pass filters for phase adjusting, not using ta for phase problems...



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[WOOSEY]

Word to your mother.

I just did... She looked pretty stupid when I said that...

Do you know her? She did some translating work for 10cc and Uriah heep a long time ago..

[chefhow]

I've seen numbers from each side on equalizer with sliders that were completely different ( no mirror image ).

But sound was very nice to my ears

I have never seen an EQ that was the same on both left and right that sounded very good.

[chad]

He did that with a sub upfront. When we did my car I could have as much as 10MS added to mine. At one point we were playing around and added 12+ ms to the fronts and had the image half way out the hood, it was just like listening in a tunnel...

http://en.wikipedia.org/wiki/Precedence_effect
http://www.rane.com/par-h.html

[Hi-FiDelity]

Ok, I was messing with the T/A on my new HU, so I can have it set to match my car instead of using the default "sedan" setting. I wanted to give the measuring the distance from each driver to the desired listening position (Front Left in this case). From myh understanding I would measure the distance from the farthest driver from the desired listening position (Right Rear) and set the distance/delay to the measurement on the HU (57 inches in my case). You would then take a measurement of the next furthest driver (front right) and add the difference between the two to get the T/A for that driver. It was 55 inches which is 2 inches closer meaning I set it to 58 inches, correct?

[WOOSEY]

Ok, I was messing with the T/A on my new HU, so I can have it set to match my car instead of using the default "sedan" setting. I wanted to give the measuring the distance from each driver to the desired listening position (Front Left in this case). From myh understanding I would measure the distance from the farthest driver from the desired listening position (Right Rear) and set the distance/delay to the measurement on the HU (57 inches in my case). You would then take a measurement of the next furthest driver (front right) and add the difference between the two to get the T/A for that driver. It was 55 inches which is 2 inches closer meaning I set it to 58 inches, correct?

I think you should just measure and enter the distances in the HU, the processor does the calculating... ( A kenwood unit ? )

[Fricasseekid]

And make sure to report back how it turns out.

Most systems I've seen only need the differences entered, with the furthest driver remaining at 0".


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[Hi-FiDelity]

I think you should just measure and enter the distances in the HU, the processor does the calculating... ( A kenwood unit ? )

The HU is a Pioneer FH-P5000MP from 2005, so I don't know how sophisticated her DSP is in that regard. The manual doesn't tell me a damn thing aside from how to adjust the settings. I'll try just inputting the difference and report back.

[Hi-FiDelity]

Well I set the T/A as woosey and Fric suggested and it solved the imaging issues I had been experiencing. The sound stage is definitely centered in front left of the car now, though it not as focused as I would have hopped I think that could be due to the lack of power my speakers are getting from the head units inbuilt amp. We'll see what happens when I get the amp installed.

[Fricasseekid]

Ee-Kew!!!


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