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4 pi & 7 Pi plans [message #67246] Wed, 27 April 2011 15:03 Go to next message
guppery is currently offline  guppery
Messages: 3
Registered: April 2011
Esquire
Could I get plans for the 4&7 Pi? I want to look at the crossover info and horns. Is it posted somewhere? Thanks, Sam.
Re: 4 pi & 7 Pi plans [message #67250 is a reply to message #67246] Wed, 27 April 2011 15:48 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18783
Registered: January 2001
Illuminati (33rd Degree)

Please decide which model you prefer and let me know, I'll send plans right away. Here is some information on the design philosophies which should help you decide which model is right for you:
Re: 4 pi & 7 Pi plans [message #67253 is a reply to message #67246] Wed, 27 April 2011 16:59 Go to previous messageGo to next message
guppery is currently offline  guppery
Messages: 3
Registered: April 2011
Esquire
I really would like to see both. I currently am running a dyi with jbl 2226h, 2426j, 2344a, 2404h and TC lmsr subs. I am considering adding 2123h and/or possibly changing waveguides. I'm assuming with a change to 8 ohm diapraghms on the 2426 the networks should be close.
Re: 4 pi & 7 Pi plans [message #67256 is a reply to message #67253] Wed, 27 April 2011 18:24 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18783
Registered: January 2001
Illuminati (33rd Degree)

Photos of both kinds of speakers are shown in the document in my last post. It also shows you how they should be setup in the room. Perhaps I can help you decide which model would be better for you.

Do you have corners that would be suitable for constant directivity cornerhorns? If so, I'd suggest going with the seven π cornerhorns. They have some distinct advantages that no other configuration can touch - namely constant directivity across the full audio bandwidth and freedom from self-interference from boundary reflections. Those are significant advantages.

The problem is, of course, that not every room has the right layout for constant directivity cornerhorns. In fact, I'd say probably most rooms don't. In that case, go with the matched-directivity two-ways (four π) and use flanking subs. That will give you a lot of advantages, and with proper setup, you can get them to be almost as good.

Re: 4 pi & 7 Pi plans [message #67263 is a reply to message #67256] Wed, 27 April 2011 22:11 Go to previous messageGo to next message
guppery is currently offline  guppery
Messages: 3
Registered: April 2011
Esquire
If I must choose make it the 4 pi. Thanks
Re: 4 pi & 7 Pi plans [message #67264 is a reply to message #67263] Wed, 27 April 2011 22:50 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18783
Registered: January 2001
Illuminati (33rd Degree)

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