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Old 22nd February 2009, 02:39 AM   #1
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Default 2.5 way with DE250 / RCFH100

after thinking about the Radian 5208c i came across the DE250 driver and horn.

I would like to keep the high sensitivity 96db or greater. But maybe throw on a couple of 10" or 12" drivers in a 2.5 way configuration. Probably ported.

Problem is that a LF driver that goes nice and low usually is quite expensive and i would need 4 total. Also, most have quite a bit of ripple 2Khz and up.

so what drivers could i use for the LF?

thanks!
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Old 22nd February 2009, 02:57 AM   #2
tinitus is offline tinitus  Europe
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Default Re: 2.5 way with DE250 / RCFH100

Quote:
Originally posted by AudioGeek

I would like to keep the high sensitivity 96db or greater.

But maybe throw on a couple of 10" or 12" drivers in a 2.5 way configuration. Probably ported.

thanks!

I have been close to building a similar design...a 2.5way with 12" and 18" and Azura horns

I believe theres some risk of phase issues using diffferent woofer fore a 2.5way
It may work ok though, Im just saying it might not be that simple
And tweeter horns could be tricky things too

Below is my present goal fore a high sensitivity design
Quite affordable really, due to the cheap BETA-8...but the Beyma AMT ribbon TPL150H does cost a significant bit
Unfortunately the needed subs might cost equally as much, or more
Be aware that crossovers are not so easily done, though I expect the ribbons might make things just a bit easier

Active systems seems to gain in popularity and doesnt need to cost a fortune
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Old 22nd February 2009, 03:07 AM   #3
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or....

get a really high sensitivity LF driver and use a BSC and loose 6db.

then only need 2 LF drivers total.

then just a simple 2 way.

any 10 or 12" drivers that would work with the DE250 and go low? 40-50Hz in a ported cab?
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Old 22nd February 2009, 07:01 PM   #4
tomcat9 is offline tomcat9  United States
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I am planning a high sensitivity design also. For the woofer, I plan to use the B&C 15NW76. This is a 15 in woofer that is 100 db spl. In my design, I am not trying to get the very lowest sub-bass, but more concerned that bass, mid-bass, and low midrange sounds the best. In my design, I plan for this woofer to play up to about 500 hz.

If you notice, each B&C woofer has either a radial, or an exponential cone shape. They recommend the radial shape for the lowest bass and sub-woofer usage. The exponential designs are recommended for woofer and mid-woofer.
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Old 22nd February 2009, 09:48 PM   #5
ttan98 is offline ttan98  Australia
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Default Re: 2.5 way with DE250 / RCFH100

Quote:
Originally posted by AudioGeek
after thinking about the Radian 5208c i came across the DE250 driver and horn.

I would like to keep the high sensitivity 96db or greater. But maybe throw on a couple of 10" or 12" drivers in a 2.5 way configuration. Probably ported.

Problem is that a LF driver that goes nice and low usually is quite expensive and i would need 4 total. Also, most have quite a bit of ripple 2Khz and up.

so what drivers could i use for the LF?

thanks!
Good choice I am currently using the De250 and RCF100 horn combo, sound rather good, you don't even have to equalise the combo.
The woofer I am using is an old alnico I bought from E bay and sounds good as well. I like to suggest you may want to look at 10" woofer from Abrown/Tone Tubby. Its is about $100 each comparable to Eminence. If I design a 2.5 way speaker I will use 8"/10" ceramic as mid and 10" super boy as bass.

refer to this site for details:http://www.tonetubby.com/ts.html
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