What frequencies in a car are most sensitive to Phase?
Yankee
Joined: Oct 2003
Posts: 3,599
Adam
That is just it, most of us have not done time alignment. Several good reasons for not having done TA with money topping the list and undue complexity second. I have never heard time alignment, once again most haven’t heard it. It is, by all accounts, a great tool... but not the end all solution. I think that sums up the comments so far.
Personally, I would prefer to use digital time alignment to tearing up my car and putting in a fake dash, if I wanted the best possible sound though I would build a dash around ideal speaker placement. TA would still be close to a last course of action even then.
That is just it, most of us have not done time alignment. Several good reasons for not having done TA with money topping the list and undue complexity second. I have never heard time alignment, once again most haven’t heard it. It is, by all accounts, a great tool... but not the end all solution. I think that sums up the comments so far.
Personally, I would prefer to use digital time alignment to tearing up my car and putting in a fake dash, if I wanted the best possible sound though I would build a dash around ideal speaker placement. TA would still be close to a last course of action even then.
0 Watt CAFz'r
Joined: Feb 2004
Posts: 2
Hi everyone . I'm just new to the board and found this topic very interesting . My thoughts would lead me to suggest that because a 3000 Hz soundwave is only about 4.5 inches long , you just can't avoid some type of grid pattern from the mixed signals of your speakers . However , a 60 Hz soundwave is about 18.5 feet long . It's longer than the cabin of every vehicle except a bus or a large motorhome . I would say that time alignment would be more critical as the frequency decreases , especially with the wavelengths closer to the size of your listening area .
Thread Starter
1000 Watt CAFz'r
Joined: Oct 2003
Posts: 1,783
Just my personal experience here:
I've found that at or around 80hz, a sub and midbass being in perfect phase is audible. But, as you decrease the frequency, it becomes less audible. I've currently got my midbass/sub crossover point at 55hz, and I can't hear any difference by varying the phase. (I have an infinitely adjustable phase control module in my midbass amp) This may be due to the reduced output of the midbass due to excursion limitations, but even at low volume levels, I find the result the same. I do believe that you can tune phase at that frequency for maximum spl at a specific point,(microphone on windshield for example) but the average response across the entire listening area will be similar. (resonant nodes would be more of an issue)
I have no theory to support my experience, so everyone feel free to step in and explain my results.
Adam
I've found that at or around 80hz, a sub and midbass being in perfect phase is audible. But, as you decrease the frequency, it becomes less audible. I've currently got my midbass/sub crossover point at 55hz, and I can't hear any difference by varying the phase. (I have an infinitely adjustable phase control module in my midbass amp) This may be due to the reduced output of the midbass due to excursion limitations, but even at low volume levels, I find the result the same. I do believe that you can tune phase at that frequency for maximum spl at a specific point,(microphone on windshield for example) but the average response across the entire listening area will be similar. (resonant nodes would be more of an issue)
I have no theory to support my experience, so everyone feel free to step in and explain my results.
Adam
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frankydudy
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Nov 19, 2006 09:01 PM
