Design me a crossover and I'll build it

454Casull · 14th February 2013, 05:10 AM

Need a crossover for a center channel I want to build this summer.

See attached for a pic of the front baffle. Volume is likely to be 1-1.25 ft^3, sealed. Front baffle dimension is 8"x20" WxL.

Drivers are:

Vifa DQ25SC16-04
Fountek FR88EX
2x Silver Flute W17RC38-08

The unit will be below ear level but can be tilted up to have its forward axis meet the ears.

Not looking to spend too much, as you can see from the driver selection. I am OK with steel-core inductors but would prefer poly caps. I expect the crossover points should be somewhere around 2 kHz and 400 Hz. Slopes are up to you.

454Casull · 14th February 2013, 05:17 AM

If anyone is wondering why I don't build the ZD3C design by Zaph, it's because it's more expensive. I already have the tweeter and the W17RC38 is cheaper than the RS180.

Would like to be able to get everything from solen.ca but it's not a must.

Jay1111 · 14th February 2013, 05:30 AM

I can hook you up, probably wont be until tomorrow though.

Jay1111 · 14th February 2013, 02:24 PM

This is where I'm at right now. Will tweek some more after work.

454Casull · 03:00 PM

Great, thanks!

I hope you'll be able to get rid of the dip at 2.3ish kHz.

454Casull · 14th February 2013, 09:35 PM

Any particular reason for the 3.5 kHz crossover point?

Jay1111 · 14th February 2013, 10:21 PM

I'll do what I can to smooth things out, it's diffraction related though. Xover is going to be where everything lines up smoothly. Your ctc spacing is good to just over 4.1 khz.

dumptruck · 15th February 2013, 01:04 AM

Are you simulating that with no z-offset?

Jay1111 · 15th February 2013, 01:14 AM

Quote:

Originally Posted by dumptruck

Are you simulating that with no z-offset?

No, but the Z axis is only a best guess based on looking at the driver blue print.

Jay1111 · 15th February 2013, 01:18 AM

I'm pretty happy with this one. You can also see the XYZ I'm using. The design axis is 152 mm above the tweeter, to take your placement into account.

14th February 2013, 05:17 AM	#2
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	If anyone is wondering why I don't build the ZD3C design by Zaph, it's because it's more expensive. I already have the tweeter and the W17RC38 is cheaper than the RS180. Would like to be able to get everything from solen.ca but it's not a must. __________________ Building a 2.1 system out of a 3/4"x4'x8' sheet

14th February 2013, 02:56 PM	#5
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	Great, thanks! I hope you'll be able to get rid of the dip at 2.3ish kHz. __________________ Building a 2.1 system out of a 3/4"x4'x8' sheet Last edited by 454Casull; 14th February 2013 at 03:00 PM.

14th February 2013, 09:35 PM	#6
454Casull diyAudio Member Join Date: Jan 2004 Location: Toronto, ON, Canada	Any particular reason for the 3.5 kHz crossover point? __________________ Building a 2.1 system out of a 3/4"x4'x8' sheet

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14th February 2013, 05:30 AM	#3
Jay1111 diyAudio Member Join Date: Feb 2013 Location: AK	I can hook you up, probably wont be until tomorrow though.

14th February 2013, 10:21 PM	#7
Jay1111 diyAudio Member Join Date: Feb 2013 Location: AK	I'll do what I can to smooth things out, it's diffraction related though. Xover is going to be where everything lines up smoothly. Your ctc spacing is good to just over 4.1 khz.

15th February 2013, 01:04 AM	#8
dumptruck diyAudio Member Join Date: May 2010 Location: MN	Are you simulating that with no z-offset?

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