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4Pi Plans & a question [message #95973] Wed, 07 September 2022 06:36 Go to next message
suddenko is currently offline  suddenko
Messages: 2
Registered: September 2022
Esquire
Hi Wayne, huge fan of your work. I would love a set of 4pi plans.


Also a question. Have you explored the option of lining the enclosure with sheet lead to absorb standing waves? Seems a couple of guys do this to their high end models.



Thanks.
Re: 4Pi Plans & a question [message #95975 is a reply to message #95973] Wed, 07 September 2022 08:12 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18711
Registered: January 2001
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I've used various insulation materials and I've used constrained-layer panels, with PVC as the damping layer.

I haven't found any damping material that works as well as fiberglass-based R11. And while constrained layer panels definitely damp panel resonance, it didn't give any measurable improvement on my speakers. The bracing that is used is sufficient.
Re: 4Pi Plans & a question [message #95976 is a reply to message #95975] Wed, 07 September 2022 08:23 Go to previous messageGo to next message
suddenko is currently offline  suddenko
Messages: 2
Registered: September 2022
Esquire
Thank you for the plans.


Lead has amazing energy absorption properties, so I will take before and after measurements to see what it does in a larger enclosure.


Thanks again.
Re: 4Pi Plans & a question [message #96259 is a reply to message #95976] Tue, 03 January 2023 12:31 Go to previous messageGo to next message
33 is currently offline  33
Messages: 3
Registered: October 2022
Location: Hamburg
Esquire
Hi Wayne.

We had already emailed briefly in October.
After studying your theories very interestingly, I would like to build the 4pi.
Would you please also provide me with the blueprint for the cabinet and crossover.

Best regards.
Re: 4Pi Plans & a question [message #96260 is a reply to message #96259] Tue, 03 January 2023 13:45 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18711
Registered: January 2001
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