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coruphius

can someone please...

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help me make a crossover...

i wanna make a 4 way crossover with the freqs of

400hz, 3000hz, 10,000hz at 12db rolloff or betterer

would anybody be able to help out?

cheers!

Cory

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Hi Cory, I need Thiele Small parameters on all the drivers.

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hey Aslan, thought you might reply first, i think i asked you ages about x-overs.

i don't know if it might be worth it with jaycar response speakers which i was looking at just as an hobby set, using the 10khz for the foster ribbon tweeter. im still figuring out how i would like to have the layout of the speakers too.

ok, woofers

trying to debate if i should use the 10" or 12", so ill put down both..

might use 4 of them configured to 8 ohm (change ideas for me if my idea not that great ;))

10" woofer (http://www.jaycar.com.au/productView.asp?ID=CW2198&CATID=&keywords=cw%2D2198&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=)

Specifications:

•Nominal impedance:8 ohms

• Power nominal: 225WRMS

• Frequency response: 40Hz - 1kHz

• Sensitivity: 90dB (1W@1m)

• Qms: 1.011

• Qes: 0.473

• Qts: 0.322

• Vas: 21.76 litres

• Fs: 59.82Hz

• Tuning frequency: 40Hz-1kHz

12" woofer (http://www.jaycar.com.au/productView.asp?ID=CW2199&CATID=&keywords=cw%2D2199&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=)

Specifications

• Nominal impedance:8 ohms

• Power nominal: 225WRMS

• Frequency response: 28Hz - 550Hz

• Qms: 1.642

• Qes: 0.445

• Qts: 0.35

• Vas: 57.615 litres

• Fs: 33.172Hz

• Tuning Frequency(Hz): 28Hz-550Hz

Mids, i might use 4 in an 8 ohm config

5" mid (http://www.jaycar.com.au/productView.asp?ID=CW2192&CATID=&keywords=cw%2D2192&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=)

Specifications

•Nominal impedance: 8 ohms

• Power nominal: 50WRMS

• Frequency response: 70Hz - 7kHz

• Sensitivity: 88dB (1W@1m)

• Qms: 1.404

• Qes:0.717

• Qts: 0.474

• Fs: 67.63Hz

Tweeter, just the one

25mm tweet (http://www.jaycar.com.au/productView.asp?ID=CT2009&CATID=&keywords=ct%2D2009&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=)

Specifications:

•Nominal impedance: 5 ohms

• Power handling: 15WRMS

• Sensitivity: 92dB 2.83V at 1m

• Crossover frequency: 2500Hz

and last of all, the ribbon tweet

100mm ribbon (http://www.jaycar.com.au/productView.asp?ID=CT2023&CATID=&keywords=ct%2D2023&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=)

Specs:

Type: Regular-phase 100mm ribbon tweeter.

Power: 20 Watts RMS (cont), 50W max.

SPL: 92dB/Watt.

Frequency Response: 6,000 to 40,000Hz +/-2dB (SUBLIME!).

Impedance: 8ohms.

Crossover Frequency: 6,400Hz (12dB / Octave).

ill be also making centre and surrounds in a 3 way using the mid/woofers, tweeters and ribbons too..

big project to work on, but thats what id like to do :D

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4 woofers, 4 mids, 1 tweeter, 1 super tweeter..............madness mate.

If you crank it up you'll blow the crud out of the tweeter if its only rated at 15watts.

Now, If I was you I'd consider 2 tweeters in series to compensate for the extra sensitivity, run them in an extended D'Appolito array with the 4 mids in a narrow baffle, and mount my 4 woofers behind that lot in a side firing configuration in a separate rear chamber.

But then again, everyone KNOWS I'm mad.

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now that sounds exciting, any simple diagrams you could show of how it could look like? im mad with how i want stuff! i like loud but detailed lol!

would i use 2 normal tweeters or two ribbons?

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now that sounds exciting, any simple diagrams you could show of how it could look like? im mad with how i want stuff! i like loud but detailed lol!

would i use 2 normal tweeters or two ribbons?

You need something with high power handling..............stacked ribbons would be better than stacked domes.

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well looks like my plans have gone into the trash can, my other half doesnt want BIG TOWERS in the lounge lol, so i gonna have to build some petite bookshelves :rolleyes: she said nothing about the subs hehe

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hmm... aslans design sounds pretty good - pity you can't do something like that :rolleyes:

i'd also recommend against using those ribbon tweeters down lower - i have a couple of pairs of them and have used them in my main and second setups in various configurations for a couple of years now, and have gone back to using them as super-tweeters (12kHz 6dB/oct HP and a steeper rolloff below 4kHz) as my peerless silk-domes sound far nicer in the lower frequency ranges (3.5-12kHz).

I suspect that it's a THD thing, as ribbons have very little linear travel, and will distort very easily when given any real excursion.

Your 10kHz original idea should be good though ;)

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