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Re: New 3Pi build [message #86517 is a reply to message #86096 ] Fri, 10 November 2017 17:12 Go to previous messageGo to next message
tubemax  is currently offline tubemax
Messages: 27
Registered: February 2012
Location: Netherlands
Chancellor
Thanks Wayne,

I was actually trying to find port tube with 2,5 inch INSIDE diameter but could not find any, all of them where 2,5 inch outside - not what your design demand, so went ahead and bite the bullet with drilling... it came out ok.

Another question, how well 3 Pi works with high power transistor amp's, for example crown XLI or XLS series ( AB & class D )?
Re: New 3Pi build [message #86518 is a reply to message #86517 ] Sat, 11 November 2017 10:36 Go to previous messageGo to next message
Wayne Parham  is currently offline Wayne Parham
Messages: 17022
Registered: May 2009
Illuminati (33rd Degree)

I love Crown amps and have a couple of them myself. I prefer the older Class AB amps to the Class D amps, but I'll bet if I was lugging them around for gigs I might change my mind. But they're great for all-out SPL, and your speakers will love them.

About the port, the truth is the 2.5" O.D. tube would have worked just fine. The difference from the slight change of Helmholtz frequency is minor - Much less than the fluctuation you'll see from the shifting electro-mechanical parameters as voice coil temperature changes at various power levels. I design all my speakers with a wide margin of tolerance for this kind of shift.

Re: New 3Pi build [message #86520 is a reply to message #86096 ] Sat, 11 November 2017 17:53 Go to previous messageGo to next message
tubemax  is currently offline tubemax
Messages: 27
Registered: February 2012
Location: Netherlands
Chancellor
Good to know that speakers like higher power amps as I'm not anymore into low power tube amps as before, I should have asked about port tolerances earlier - it would have saved me some time... going back to gluing process... Confused
Re: New 3Pi build [message #86600 is a reply to message #86096 ] Sun, 19 November 2017 16:12 Go to previous messageGo to next message
tubemax  is currently offline tubemax
Messages: 27
Registered: February 2012
Location: Netherlands
Chancellor
Well, another week passed and I did so little but somehow succeeded to put together both enclosures and now I can start with placing damping material and do something about the looks... work in progress...

index.php?t=getfile&id=2013&private=0

index.php?t=getfile&id=2014&private=0

Re: New 3Pi build [message #86609 is a reply to message #86600 ] Mon, 20 November 2017 08:39 Go to previous messageGo to next message
Wayne Parham  is currently offline Wayne Parham
Messages: 17022
Registered: May 2009
Illuminati (33rd Degree)

Getting closer!

Won't be long before they're makin' music!

Re: New 3Pi build [message #86613 is a reply to message #86096 ] Mon, 20 November 2017 15:18 Go to previous message
tubemax  is currently offline tubemax
Messages: 27
Registered: February 2012
Location: Netherlands
Chancellor
Thanks Wayne,

Yes, I can finally see light in the end of a tunnel...

index.php?t=getfile&id=2015&private=0

  • Attachment: tunnel.jpg
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