FAST build with Alpair 7.3 and Seas L26ROY and Hypex AS2.100 - Page 2 - diyAudio
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Old 27th March 2012, 07:22 PM   #11
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looks nice, here I made this in Photoshop to see if you like this

Click the image to open in full size.
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Old 27th March 2012, 08:27 PM   #12
Swifty is offline Swifty  Netherlands
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To be honest I like the simpler design I have at the moment. Although it would be nice to conceal the woofer flange. Thanks for the effort!
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Old 27th March 2012, 09:53 PM   #13
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Very nice looking. Looks like a lot of work.

So you plan to take measurements??? I'd love to see them.
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Old 26th April 2012, 04:52 PM   #14
fakeout is offline fakeout  Canada
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Why do FAST designs have the woofer on the side?
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Old 26th April 2012, 05:36 PM   #15
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Just on some...

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Old 26th April 2012, 05:44 PM   #16
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Quote:
Originally Posted by fakeout View Post
Why do FAST designs have the woofer on the side?
When it's too big to fit on the front.

jeff
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Old 26th April 2012, 06:16 PM   #17
Swifty is offline Swifty  Netherlands
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Placing the woofer on the side has the obvious advantage of being able to use a large woofer without compromising on baffle width and therefore imaging. Right now I am making nice progress of dialling these in. The crossover is done via the DSP of the AS2.100 units. I am crossing over at 250 hz, LR4. I added a 5 db low shelf with a centre frequency of 595 hz. The woofer has a LT with a pole Q of 0.5 and a pole freq. of 27 hz.

While I will likely slightly modify things here and there, this already sounds amazing.
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Old 3rd May 2012, 02:54 PM   #18
Swifty is offline Swifty  Netherlands
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These are almost finished now. I am very happy with the results! Combining the Alpair with a woofer really pays dividends in imaging, clarity and composure of the total system. Not to mention the effortless dynamics. Here are a couple of pictures of the finished cabinets:

Click the image to open in full size.
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Old 3rd May 2012, 03:13 PM   #19
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Quote:
Originally Posted by Swifty View Post
I am crossing over at 250 hz, LR4. I added a 5 db low shelf with a centre frequency of 595 hz.
You could probably eliminate the shelf by level adjustment between the drivers??

Did you ever measure these? I helped a guy on another forum with his A7 FAST. He measured the A7 with an LR4 at 300hz high pass. I didn't do the measurement, but I processed it. The gate is 2.7ms because he measured to close to the floor, so the high pass isn't well defined in the measurements. He got this:

Click the image to open in full size.

That was in the cab. I'm surprised by the baffle step region. He may have done something wrong there. But it leaves me thinking your 5db shelf might be aggressive.

These must make great bass Are you using the minidsp?
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Old 3rd May 2012, 03:58 PM   #20
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Those are gorgeous – well done!
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