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Back Loaded Horn enclosure for Audio Nirvana Super 8 Alnico
Back Loaded Horn enclosure for Audio Nirvana Super 8 Alnico
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Old 22nd September 2018, 09:52 PM   #1
Negas is offline Negas  Uruguay
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Default Back Loaded Horn enclosure for Audio Nirvana Super 8 Alnico

Hi!
I have been many days looking for a back loaded enclousure for my pair of AN8 super alnico.

The initial project was a BLH for fe206en that are resting in their boxes. Although, my main setup, a pair of AN8 in a BR (fostex recommended) would be upgraded.

The finalist are Kirishima Manifold vs Fe208ez recommended BLH.

Would you suggest me any other option?
Any insights?

Thank in advance.

Ps. I have found many post from 2008-2014 about BLH, but the interest seems decrease. Am I right?
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Old 23rd September 2018, 01:42 AM   #2
planet10 is offline planet10  Canada
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Back Loaded Horn enclosure for Audio Nirvana Super 8 Alnico
Quote:
AN8 super alnico
Click the image to open in full size.

This driver is a very different beast. We modeled the Ferrite version and it wasnít really suitable for a horn. The specs on these deviate by a huge amount. On 1st look at the Qts, it would look best suited for an OB (maybe even without helper woofer), or a big aperiodic box or a Boofle. Bigun did the latter for his AN 15Ē (similar kind of specs wrt box description) and is very happy.

Back Loaded Horn enclosure for Audio Nirvana Super 8 Alnico-an8superalnico-sealed-png

Looks like you might be able to get away with 100 litres aperiodic or a bit smaller Boofle (at the expense of bass extention). F10 into the 20s, but room will play a big role.

Click the image to open in full size.

dave
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File Type: png AN8SuperAlnico-sealed.png (19.4 KB, 392 views)
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Old 23rd September 2018, 02:24 AM   #3
Negas is offline Negas  Uruguay
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Thanks for the quick answer!
I am not familiar with this kind of enclosures. Is this aperiodic box? Aperiodic Loudspeaker Enclosure Design
I did not found any about Boofle.
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Old 23rd September 2018, 02:31 AM   #4
Negas is offline Negas  Uruguay
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Is the qts the reason why is not suitable for horn? It's 0.81 and fe206 has about 0.20

Last edited by Negas; 23rd September 2018 at 02:43 AM.
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Old 23rd September 2018, 02:46 AM   #5
planet10 is offline planet10  Canada
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Back Loaded Horn enclosure for Audio Nirvana Super 8 Alnico
That is one way to do it. Search this forum for lots of my posts on aperiodic, same for baffle.

dave
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Old 23rd September 2018, 08:57 AM   #6
Scottmoose is offline Scottmoose  United Kingdom
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Being a high Q (Qt > 0.707) driver with a 102.234Hz mass corner (Fh) & an 89.66 litre Vas the 8in AN AlNiCo is, practically speaking, not well suited to use in a back horn.
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Old 23rd September 2018, 03:15 PM   #7
Negas is offline Negas  Uruguay
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Boofle = open baffle. I'm just realized.
Ok,then the horn will be for 206.
I like the Fe208ez BLH. The mouth in the center is different than others bhl.
Thank you guys!
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Old 23rd September 2018, 07:09 PM   #8
Negas is offline Negas  Uruguay
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Dave,
Could you explain this sentence?
" F10 into the 20s, but room will play a big role."
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Old 23rd September 2018, 07:25 PM   #9
Scottmoose is offline Scottmoose  United Kingdom
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I'm not Dave but F10 = anechoic -10dB figure. Room gain & positioning within that (boundaries, construction, furnishings) will significantly affect that, & will usually provide some boost below tuning.
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Old 23rd September 2018, 07:30 PM   #10
planet10 is offline planet10  Canada
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Back Loaded Horn enclosure for Audio Nirvana Super 8 Alnico
The best Fostex factory recommended horns are just OK… Dallas Ii or Vulcan are a step up.

Boffle is sort of an OB, but not really.

dave
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