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Old 23rd October 2009, 07:22 PM   #111
rx7mark is offline rx7mark  United States
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Dave,
Another question if you don't mind.

Any way to use 2 EL70's in a fast type speaker. Say one on the front and one on the top or side? What would you do to the taper and area of the horn? Double the area is my best guess, but was hoping you could either model or give your thoughts.

Thanks in advance.

Mark
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Old 23rd October 2009, 07:34 PM   #112
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The Castle version of the microTower with the EL70 is our favorite of our Mark Audio builds to date... i'd use that for inspiration. You could probably getaway with 1.5 x the cross-section but it certainly doesn't want to be too small (probably line volume should be >10 litres).

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Old 24th October 2009, 01:19 AM   #113
ljfont is offline ljfont  Canada
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Quote:
Originally Posted by planet10 View Post

Make sure you do at least the minimal mods to the SDX7.

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What are they? Is it hard?
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Old 24th October 2009, 02:38 AM   #114
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Quote:
Originally Posted by ljfont View Post
What are they? Is it hard?
Alpair 5 project completed

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Old 25th October 2009, 08:57 PM   #115
Theli is offline Theli  Canada
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Here's one of my experiments:

Aura NS3 and Exodus EX-6.5. Crossed at 150Hz in the amp (could cross at 200 but the sub amp only goes to 150Hz), all sealed (5ltr & 15ltr, I think) , with ~3db of BSC. Sounds good where they in the picture but need lots of power to get decent volume. Just need to find another cheap amp to play with different crossover configurations.
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Old 25th October 2009, 09:09 PM   #116
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Excellent.

NS3 is something like 82 dB so you will need lots of juice. In 5 litres they will only be excursion limted at 150 Hz (that they go as low as they do is the reason for the inefficiency.

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Old 26th October 2009, 04:26 PM   #117
Theli is offline Theli  Canada
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I'm thinking with the actual sensitivity of the Aura's and BSC it's probably somewhere in the mid 70's... I may just have to get some other drivers to play with, hmmm too bad, eh?
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Old 27th October 2009, 09:26 AM   #118
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Quick question - everyone (except me) seems to put the woofers on the outside. Is there a reason behind it?

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Old 27th October 2009, 04:19 PM   #119
Theli is offline Theli  Canada
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Random chance? For me there was no real thought, but I imagine it would depend on the room.
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Old 27th October 2009, 04:35 PM   #120
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From questions people ask when they audtion them, i think that people feel that inside is their 1st instinct, but on Tysen, with the 30 degree toe-in that works so well, the woofers need to be on the outside so that they fire "forward". If they were on the inside they would be firing at the wall behind the speakers.

The cabinet size, toe-in, and XO all work together to get flatter FR thru the baffle step loss region.

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