Horn Sub Input Please - Build In Progress! - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #31 of 261 Old 03-27-13, 10:26 AM Thread Starter
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re: Horn Sub Input Please - Build In Progress!

Box is 570L. Lab 12 is double the cost, trying to take the cheap road, plus I will be building four of these boxes.
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post #32 of 261 Old 03-27-13, 10:31 AM
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re: Horn Sub Input Please - Build In Progress!

Cheap + intelligent choices = good engineering.

Have you modeled four in Hornresp?

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post #33 of 261 Old 03-27-13, 10:38 AM Thread Starter
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re: Horn Sub Input Please - Build In Progress!

Not yet but I think it should hit reference level no problem down to 15hz, my room volume is 2100 cu/ft.

Here is the updated flanking subs, box volume is 100L

Cheap drivers again!
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post #34 of 261 Old 03-27-13, 02:50 PM Thread Starter
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re: Horn Sub Input Please - Build In Progress!

1st Draft of Seating Riser Sub, this will be the Selenium 12" LFE x 4.

I also did the approx. 4 driver response, which is 1w/1m.
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post #35 of 261 Old 03-27-13, 08:30 PM
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re: Horn Sub Input Please - Build In Progress!

Back in front of a large screen.

So you should stick with your first design of the mid bass horns. A falling response will not help you in this range as there is very little room gain at the frequencies the midbass horn will be operating at.

Second.

Way to large of a rear chamber on the idea for the riser. You have basically designed a box with a very long vent.

Third.

Never load two horns into a single mouth the same size as it would be for one horn.

If you want a common mout you can do this. But it should be the summed area of two individual horns.

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post #36 of 261 Old 03-27-13, 08:35 PM
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re: Horn Sub Input Please - Build In Progress!

Which selenium are you modeling?

Instead of nit picking I'll take a kick at the can for you.

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post #37 of 261 Old 03-27-13, 08:40 PM Thread Starter
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re: Horn Sub Input Please - Build In Progress!

Okay, will redo the midbass.

The box only seems large, because of the thickness of the riser, I maybe doing something wrong, but my model was for 140L per driver, so with 2 drivers I doubled to 280L. I could make it smaller, just cause more ripple in the response, so I increased to smooth out.

The mouth won't be a single, they will have the same size as modeled just exit at the same point, sorry for the confusion with the drawing.

The selenium is a 12PW5-SLF 12"

Thanks!
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post #38 of 261 Old 03-27-13, 08:50 PM Thread Starter
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re: Horn Sub Input Please - Build In Progress!

Just thought, in the case of the woofer chamber, I did not think that dimensions mattered just the volume of the chamber, as the driver does not no that only the volume of air behind it?

Also you said you where near Ottawa, I actually live in Stayner, which is just south of Wasaga Beach.
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post #39 of 261 Old 03-27-13, 08:55 PM
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re: Horn Sub Input Please - Build In Progress!

For a sub you want a woofer with a much lower Qts.

It is a basic thing in that a lower Qts driver means it is a stronger driver.

I'm looking through the eminence line up to see if there is anything similar in price that has some umph.

What is you maximum on price?

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post #40 of 261 Old 03-27-13, 08:59 PM
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re: Horn Sub Input Please - Build In Progress!

Here is my two cents:

https://www.parts-express.com/pe/sho...number=295-032

I have used these and they blow away anything else in their price range.

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