Sealed or vented for the Alpair 7.3 - Page 3 - diyAudio
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Old 8th November 2012, 08:56 PM   #21
jimbro is offline jimbro  United States
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Yea I wasn't very clear. Any reference speaker that you like would do. Even a proven FR design will need to be 'dialed in' to taste, room and source so scratch what I said. How would blocking the ports allow better integration?
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Old 8th November 2012, 10:03 PM   #22
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Quote:
Originally Posted by jimbro View Post
How would blocking the ports allow better integration?
It may not, but usually the sealed roll off goes better with a typical HT receiver cross over. And the ported speaker will have a phase change as the port comes in. I haven't done much experimenting personally on this, so I'm just spouting off. The little I've done I usually find sealed a touch better, but nothing worth freaking out about. Maybe if the tuning was very close to the cross over to the sub, I'd freak out.
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Old 1st January 2013, 06:51 PM   #23
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So the project is pretty much done. Here are the pictures. Alpair 7.3 in 5 liters sealed box with their work mates ; subs with Dayton drivers.

I am very pleased with the sound so far. The a7.3 have a lot a details, good imaging and they integrate well with the subs.

Congratulations to Mark for this very nice driver.


Nelson Paradis
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Old 2nd January 2013, 03:48 AM   #24
toobhed is offline toobhed  United States
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I like the "two tone" look Nelson, very nice. Are you hi passing the A7's or running full range? What kind of low pass are you using on the subs? Congrats on a handsome build!
Mario
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Old 2nd January 2013, 10:40 AM   #25
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Yes, the two-tone brings a lighter look, I think. However, my pictures have a lot of distortion...

The A7 are runned full range. In a sealed 5 l box, they are not full range at all and they really need the subs.

The subs are low passed with the amp plate which is a o-audio 300w (based on a Bash). So far, I ajusted the cutting frequency around 92 hz and this is a 4th order crossover.

I havent heard the A7 in a vented box so I can't compare but the sealed box + sub combo appears viable to me.

My A7 liked to have a lot a breaking in. Up to 200 hrs, they sounded a bit bright to me. With now 400-500 hrs, they found their tonal balance.

Nelson
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