Would this 18" Celestion work in something like an 18" CHEAP THRILL ? - AVS Forum
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post #1 of 11 Old 08-22-2013, 11:08 AM - Thread Starter
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http://www.parts-express.com/pe/showdetl.cfm?partnumber=299-420&utm_source=Retail&utm_medium=Email_Newsletter&utm_content=299-420&utm_campaign=email082213

Celestion 18" Cast Frame Professional Woofer 8 Ohm $99

Just wondering. Would the box size just be kinda big? Or you would need to go 3 way ?

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post #2 of 11 Old 08-22-2013, 12:03 PM - Thread Starter
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Am I way off ? (I am noob)

How would you go about designing such a beast ?

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post #3 of 11 Old 08-22-2013, 12:25 PM
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I'm a noob too... but I'd bet it'll start beaming below the frequency where the 12" waveguide goes omni. You'd probably have to step up to the SEOS 15 or 18.

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post #4 of 11 Old 08-22-2013, 10:05 PM
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It should work just fine.
At 19inches it would be getting mighty wide.
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post #5 of 11 Old 08-23-2013, 05:04 AM - Thread Starter
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Bigger is better right ?

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post #6 of 11 Old 08-23-2013, 05:11 AM
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Quote:
Originally Posted by Mfusick View Post

Bigger is better right ?

Hell yeah! biggrin.gif
But really a bigger driver gets you more bass, for less excursion, and generally speaking, it can be a bit more sensitive too.

I'm not crossover designer but I think because this driver is 18" it limits its extension before it starts to beam (viper said it above).
So get a good directivity match to an 18", one might have to cross it to a large waveguide that can dig lower to reach the woofer.
Others may chime in..
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post #7 of 11 Old 08-23-2013, 06:56 AM - Thread Starter
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So what is a good tweet to go with it ?

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post #8 of 11 Old 08-23-2013, 07:17 AM
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the funny thing is that might actually kind of work.

to match directivity at the crossover region, a crossover around 750hz or so is what one would be looking for and compression drivers that can handle that tend to start getting more expensive which defeats the purpose of cheap thrills.

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post #9 of 11 Old 08-24-2013, 09:46 AM - Thread Starter
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So what is a good tweeter option ? Is there a decent one that will dig down low enough to match up well ?

Or is it better to go 3 way ?

How much difference would a good tweeter that digs down low be in cost compared to a cheaper tweeter and a midrange driver ?

Or in comparison to a tweet that does not go so low, but is good and costs less so I could match it up with a better driver instead?

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post #10 of 11 Old 08-24-2013, 11:41 AM
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The highest you want to run an eighteen is perhaps 800Hz, pretty much forcing a 3 way unless you use an expensive 2" throat horn HF driver.

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post #11 of 11 Old 08-27-2013, 10:08 AM - Thread Starter
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Quote:
Originally Posted by Bill Fitzmaurice View Post

The highest you want to run an eighteen is perhaps 800Hz, pretty much forcing a 3 way unless you use an expensive 2" throat horn HF driver.

Thanks !

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