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Re: 7Pi Build 2014 [message #80731 is a reply to message #80730]

Mon, 20 October 2014 09:28

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

The woofer-to-mid crossover is a pretty simple first-order low-pass on the woofer. I use a 5.6mH coil, so crossover is around 250Hz. The midhorn has no electrical high-pass, so the two overlap in the upper-midbass / lower-midrange which helps smooth the top octave of the modal region. However, the mid-to-tweeter crossover isn't as simple. The transfer function is pretty complex. Best to look over the "Crossover" and "Simulations and Measurements" sections of the Pi Speakers FAQ.

In particular, study the information in the link called "Crossover optimization for DI-matched two-way speakers." Even though that document is about a two-way design, it's the exact same process I use to dial-in the upper crossover in a three-way design. So if you can duplicate that process, you can duplicate the crossover. I essentially design a digital crossover using the Spice models in WTPro, and then implement the crossover with passive parts.

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[Message index]

		7Pi Build 2014 By: compaddict on Fri, 20 June 2014 17:54
		Re: 7Pi Build 2014 By: compaddict on Fri, 20 June 2014 17:55
		Re: 7Pi Build 2014 By: compaddict on Fri, 20 June 2014 17:56
		Re: 7Pi Build 2014 By: compaddict on Fri, 20 June 2014 23:13
		Re: 7Pi Build 2014 By: compaddict on Tue, 24 June 2014 14:46
		Re: 7Pi Build 2014 By: Wayne Parham on Tue, 24 June 2014 15:46
		Re: 7Pi Build 2014 By: compaddict on Thu, 24 July 2014 15:25
		Re: 7Pi Build 2014 By: petew on Thu, 24 July 2014 19:51
		Re: 7Pi Build 2014 By: compaddict on Fri, 25 July 2014 13:47
		Re: 7Pi Build 2014 By: compaddict on Fri, 01 August 2014 15:56
		Re: 7Pi Build 2014 By: compaddict on Sat, 09 August 2014 22:10
		Re: 7Pi Build 2014 By: compaddict on Sun, 10 August 2014 16:36
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 11 August 2014 08:02
		Re: 7Pi Build 2014 By: compaddict on Tue, 26 August 2014 18:20
		Re: 7Pi Build 2014 By: compaddict on Fri, 29 August 2014 17:27
		Re: 7Pi Build 2014 By: Wayne Parham on Fri, 29 August 2014 19:54
		Re: 7Pi Build 2014 By: compaddict on Mon, 01 September 2014 14:01
		Re: 7Pi Build 2014 By: compaddict on Mon, 01 September 2014 21:44
		Re: 7Pi Build 2014 By: Wayne Parham on Tue, 02 September 2014 00:00
		Re: 7Pi Build 2014 By: compaddict on Fri, 05 September 2014 17:56
		Re: 7Pi Build 2014 By: blvdre on Sat, 06 September 2014 06:30
		Re: 7Pi Build 2014 By: petew on Sat, 06 September 2014 11:14
		Re: 7Pi Build 2014 By: compaddict on Sat, 06 September 2014 15:12
		Re: 7Pi Build 2014 By: compaddict on Sun, 07 September 2014 15:39
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 08 September 2014 10:22
		Re: 7Pi Build 2014 By: compaddict on Mon, 08 September 2014 19:21
		Re: 7Pi Build 2014 By: compaddict on Tue, 09 September 2014 23:19
		Re: 7Pi Build 2014 By: Wayne Parham on Wed, 10 September 2014 15:31
		Re: 7Pi Build 2014 By: compaddict on Thu, 11 September 2014 17:23
		Re: 7Pi Build 2014 By: compaddict on Fri, 12 September 2014 09:59
		Re: 7Pi Build 2014 By: rkeman on Fri, 12 September 2014 15:02
		Re: 7Pi Build 2014 By: compaddict on Fri, 12 September 2014 15:10
		Re: 7Pi Build 2014 By: compaddict on Fri, 12 September 2014 17:11
		Re: 7Pi Build 2014 By: compaddict on Sat, 13 September 2014 12:52
		Re: 7Pi Build 2014 By: my0x on Sat, 13 September 2014 19:34
		Re: 7Pi Build 2014 By: tubemax on Sun, 14 September 2014 04:03
		Re: 7Pi Build 2014 By: tubemax on Sun, 14 September 2014 04:42
		Re: 7Pi Build 2014 By: tubemax on Sun, 14 September 2014 05:27
		Re: 7Pi Build 2014 By: Wayne Parham on Sun, 14 September 2014 10:38
		Re: 7Pi Build 2014 By: compaddict on Sun, 14 September 2014 11:15
		Re: 7Pi Build 2014 By: Wayne Parham on Sun, 14 September 2014 19:16
		Re: 7Pi Build 2014 By: compaddict on Sun, 14 September 2014 19:22
		Re: 7Pi Build 2014 By: compaddict on Sun, 14 September 2014 21:30
		Re: 7Pi Build 2014 By: Wayne Parham on Sun, 14 September 2014 22:20
		Re: 7Pi Build 2014 By: compaddict on Sun, 14 September 2014 23:43
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 15 September 2014 08:10
		Re: 7Pi Build 2014 By: compaddict on Mon, 15 September 2014 10:54
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 15 September 2014 12:02
		Re: 7Pi Build 2014 By: compaddict on Mon, 15 September 2014 12:29
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 15 September 2014 16:23
		Re: 7Pi Build 2014 By: compaddict on Wed, 17 September 2014 00:06
		Re: 7Pi Build 2014 By: Wayne Parham on Wed, 17 September 2014 07:14
		Re: 7Pi Build 2014 By: compaddict on Wed, 17 September 2014 08:32
		Re: 7Pi Build 2014 By: Wayne Parham on Wed, 17 September 2014 10:23
		Re: 7Pi Build 2014 By: compaddict on Wed, 17 September 2014 10:44
		Re: 7Pi Build 2014 By: tom-m on Wed, 17 September 2014 14:45
		Re: 7Pi Build 2014 By: Wayne Parham on Wed, 17 September 2014 16:12
		Re: 7Pi Build 2014 By: compaddict on Sun, 28 September 2014 11:37
		Re: 7Pi Build 2014 By: rkeman on Sun, 28 September 2014 12:11
		Re: 7Pi Build 2014 By: compaddict on Sat, 04 October 2014 10:22
		Re: 7Pi Build 2014 By: skywave-rider on Sat, 04 October 2014 13:52
		Re: 7Pi Build 2014 By: compaddict on Sat, 04 October 2014 14:15
		Re: 7Pi Build 2014 By: Wayne Parham on Sun, 05 October 2014 08:51
		Re: 7Pi Build 2014 By: compaddict on Sun, 05 October 2014 10:53
		Re: 7Pi Build 2014 By: compaddict on Sun, 05 October 2014 16:52
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 08:37
		Re: 7Pi Build 2014 By: compaddict on Mon, 06 October 2014 12:12
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 14:00
		Re: 7Pi Build 2014 By: JCDC on Mon, 06 October 2014 14:01
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 14:09
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 14:30
		Re: 7Pi Build 2014 By: my0x on Mon, 06 October 2014 14:46
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 14:47
		Re: 7Pi Build 2014 By: compaddict on Mon, 06 October 2014 14:54
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 15:00
		Re: 7Pi Build 2014 By: compaddict on Mon, 06 October 2014 15:13
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 15:24
		Re: 7Pi Build 2014 By: compaddict on Mon, 06 October 2014 15:38
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 06 October 2014 16:17
		Re: 7Pi Build 2014 By: compaddict on Mon, 06 October 2014 16:32
		Re: 7Pi Build 2014 By: Wayne Parham on Tue, 07 October 2014 08:18
		Re: 7Pi Build 2014 By: compaddict on Tue, 07 October 2014 12:21
		Re: 7Pi Build 2014 By: Wayne Parham on Tue, 07 October 2014 14:08
		Re: 7Pi Build 2014 By: compaddict on Thu, 09 October 2014 19:09
		Re: 7Pi Build 2014 By: compaddict on Thu, 16 October 2014 14:53
		Re: 7Pi Build 2014 By: Wayne Parham on Thu, 16 October 2014 16:21
		Re: 7Pi Build 2014 By: compaddict on Sun, 19 October 2014 18:14
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 20 October 2014 09:28
		Re: 7Pi Build 2014 By: Nelson Bass on Tue, 21 October 2014 01:04
		Re: 7Pi Build 2014 By: Wayne Parham on Tue, 21 October 2014 07:50
		Re: 7Pi Build 2014 By: compaddict on Wed, 05 November 2014 10:42
		Re: 7Pi Build 2014 By: Wayne Parham on Sat, 08 November 2014 10:07
		Re: 7Pi Build 2014 By: Nelson Bass on Wed, 12 November 2014 15:57
		Re: 7Pi Build 2014 By: compaddict on Wed, 12 November 2014 16:07
		Re: 7Pi Build 2014 By: blvdre on Sat, 15 November 2014 14:25
		Re: 7Pi Build 2014 By: compaddict on Sun, 16 November 2014 14:50
		Re: 7Pi Build 2014 By: compaddict on Thu, 20 November 2014 23:45
		Re: 7Pi Build 2014 By: compaddict on Mon, 01 December 2014 12:35
		Re: 7Pi Build 2014 By: Wayne Parham on Mon, 01 December 2014 13:54
		Re: 7Pi Build 2014 By: compaddict on Fri, 10 June 2016 13:30
		Re: 7Pi Build 2014 By: Wayne Parham on Fri, 10 June 2016 17:19
		Re: 7Pi Build 2014 By: compaddict on Sat, 08 December 2018 10:22
		Re: 7Pi Build 2014 By: Wayne Parham on Sun, 09 December 2018 10:28

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