Home » Sponsored » Pi Speakers » New 3Pi build
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: 37
Registered: February 2012
Location: Netherlands
Baron
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: 17316
Registered: January 2001
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: 37
Registered: February 2012
Location: Netherlands
Baron
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: 37
Registered: February 2012
Location: Netherlands
Baron
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: 17316
Registered: January 2001
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 messageGo to next message
tubemax is currently offline  tubemax
Messages: 37
Registered: February 2012
Location: Netherlands
Baron
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
    (Size: 19.06KB, Downloaded 2192 times)
Re: New 3Pi build [message #86648 is a reply to message #86096] Sun, 26 November 2017 10:49 Go to previous messageGo to next message
tubemax is currently offline  tubemax
Messages: 37
Registered: February 2012
Location: Netherlands
Baron
Getting even closer but not yet done...

I decided to use the vinyl to wrap the speakers, also painted the back side and I'm just about to start with front side but my back started to hurt - the more material goes in to the box - the heavier it feels. need to rest for few days...

index.php?t=getfile&id=2017&private=0

index.php?t=getfile&id=2018&private=0

index.php?t=getfile&id=2019&private=0

  • Attachment: Bottom.jpg
    (Size: 407.01KB, Downloaded 2121 times)
  • Attachment: First one.jpg
    (Size: 483.18KB, Downloaded 2116 times)
  • Attachment: Second one.jpg
    (Size: 415.88KB, Downloaded 2115 times)
Re: New 3Pi build [message #86649 is a reply to message #86648] Sun, 26 November 2017 11:46 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 17316
Registered: January 2001
Illuminati (33rd Degree)

Your cabinets look fantastic!

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

Re: New 3Pi build [message #86735 is a reply to message #86096] Tue, 12 December 2017 13:11 Go to previous messageGo to next message
tubemax is currently offline  tubemax
Messages: 37
Registered: February 2012
Location: Netherlands
Baron
Hi Everybody,

Well after some pause, the work has been resumed, so far speakers are 99% ready and just waiting to install glass wool any day from now.

index.php?t=getfile&id=2020&private=0


I did spend a lot of time in making those speaker grills, it's a tricky work and require a lot of patience if you want to achieve neat looking and tight grills!

index.php?t=getfile&id=2021&private=0

index.php?t=getfile&id=2022&private=0

Speaker raisers/stands are done as well, they are just there to help raise the woofer to a visible line with the listening position without any obstruction and are slightly angled as well. Total height is about 5 inch on the front side.

index.php?t=getfile&id=2023&private=0


Stay tuned in for a couple of days for the first test...

Re: New 3Pi build [message #86736 is a reply to message #86735] Tue, 12 December 2017 15:42 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 17316
Registered: January 2001
Illuminati (33rd Degree)

Wow! Those really look nice! I love the dark stain!

Previous Topic: 2pi bass reflex as central channel?
Next Topic: 12pi Subwoofers (x2) for sale $700 each ($1,400 pair)
Goto Forum:
  


Current Time: Wed Dec 12 14:15:47 CST 2018

Sponsoring Organizations

DIY Audio Projects
DIY Audio Projects
OddWatt Audio
OddWatt Audio
Pi Speakers
Pi Speakers
Prosound Shootout
Prosound Shootout
Smith & Larson Audio
Smith & Larson Audio
Tubes For Amps
TubesForAmps.com

Lone Star Audiofest