18" 45mm one way Xmas

[zbigb]

I'm new to the cult and have been looking at different IB options. I ran across this 18" with a qts of .17 and it looked interesting. The 3.5 inch Xmas is two way.

cgi.ebay.com/18-inch-Eclipse-Titanium-PRO-5000-watts_W0QQitemZ5849884446QQcategoryZ18805QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

www.eclipse-web.com/sw9100/sw9182pro.html


It's costly for a new unit but second hand it may be in the ballpark. Would this perform as well as three 15 inchers with a 21mm Xmas?

Anyone use one of these in an IB setup?

[ThomasW]

Qts 0.17.......

[zbigb]

Is that too low to raise with eq?

[ThomasW]

Yes. The only way to get that "Q" raised is by using series resistors.

Those ebay drivers aren't that great a deal for a home IB. Wait for the $200 18"s from Ascendant

[jeffp]

admin said:

Wait for the $200 18"s from Ascendant

I hope your right because that's what I'm waiting on to do my IB. I figure 4 of those would work nicely. I can wait a couple of months if it means getting a driver that's designed for the purpose. Hopefully the price is right and doesn't price a lot of us out of good IB setup.

It certainly looks promising. Then the question will be are they designed to work better in a line array or will a manifold setup be recommended. I guess the manufactor will answer that when the time comes. I'm sure either will work I just wonder with a high Xmax like I suspect they will have if having that spring effect from a opposing driver will be desired/wanted.

Jeff

[ThomasW]

Then the question will be are they designed to work better in a line array or will a manifold setup be recommended.

And you think there's a difference in these because?

I suspect they will have if having that spring effect from a opposing driver will be desired/wanted.

There is no spring effect from the opposing driver.

[jeffp]

admin said:

And you think there's a difference in these because?

It's been mentioned that some drivers aren't designed to be fired in a downward position. I can't remember what brand or brands were named. Granted I know not all line arrays are horizontal but in my case it would be.

There is no spring effect from the opposing driver.

This was a misconseption on my part then. I thought that was one of the benefits of the manifold. In my head I was picturing it working something like a isobaric configuration but with the drivers working against one another.

Lots to learn, that's why I'm here.

jeff

[ThomasW]

There are formulas on the Adire and PE websites for determining sag.

Manifolds cancel the mechanical vibrations from the drivers. They also provide a easy way to get multiple drivers mounted in a relatively small space.

The drivers in a manifold combine and function as one much larger driver.