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Old 3rd October 2020, 06:55 PM   #361
simplesteve is offline simplesteve  United Kingdom
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Alpair 7P & Alpair 12PW combination.
Zman, you are like a guardian angel. Thank you so much for looking after me!
So, is that the aspect ratio thing?
I had noted it and yes, am keeping things off centre for my holey braces.
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Old 3rd October 2020, 07:10 PM   #362
zman01 is online now zman01  Bangladesh
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Alpair 7P & Alpair 12PW combination.
simplesteve,

Glad to be of some help, and my understanding is that this covers at least this part of the aspect ratio thing :

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Originally Posted by planet10 View Post
And the 2 subpanels should have different aspect ratios (ie place the brace off-centre).
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Originally Posted by simplesteve View Post
I had noted it and yes, am keeping things off centre for my holey braces.
You'll rock it mate! Good luck with the build, and keep us posted.
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Old 3rd October 2020, 07:36 PM   #363
planet10 is online now planet10  Canada
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Alpair 7P & Alpair 12PW combination.
Aspeact ratio is the longest dimension of a panel divided by the short dimension.

dave
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Old 24th March 2021, 02:02 PM   #364
arvi is offline arvi  United States
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Alpair 7P & Alpair 12PW combination.
Seriously looking at this build (12pw+7p) and had a few questions I'm hoping someone can help address:
1. In Other threads I have seen suggestions that 7.3 may be a better combination than 7P-- any thoughts? If so, are box dimensions and XO same as for 7P?

2. I have also come across a thought that 12PW+5.3 may be an interesting combination-- has anyone tried this? If so, what was your experience? Finally, if you did what enclosure dimensions and XO did you use?

Thanks in advance
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Old 24th March 2021, 05:40 PM   #365
planet10 is online now planet10  Canada
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Alpair 7P & Alpair 12PW combination.
Yes, IMO, to both of your inquiries.

A7p is not bad, it does take some serious break0in before the top end settles down, and you are likely to be able to find some cheap since they have not been overly popular. )(i have some for Canadians).

The A12pw + A5.2/3 (little difference between the 2), is a bit more finessed, a bit better top end, better dispersion, XO could be a bit higher, taking more advantage of the A12pw extention (if you need it to play as loud), all consequences of the smaller cone. And remeber A5/A5.2/A5.3 are the original Mark Audio mono suspension drivers.

The high XO in Scott’s original A12pw/A7p work, works, but a lower XO can provide significant improvements in quality & finesse, keeping more of the sound coming from the FR.

So far XOs for A12pw and midTweeter (excepting the one in post #1) are 250-350 Hz.

dave
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