Home » Sponsored » Pi Speakers » The shop is crankin' out 12π basshorn subs!
The shop is crankin' out 12π basshorn subs! [message #49629] Wed, 14 June 2006 20:17 Go to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18669
Registered: January 2001
Illuminati (33rd Degree)

They're really doing great work with these. CNC cut pieces, dado construction, all precision cut and fit. They're impressive and I thought you might want to see a few photos from an inside view.

The 12π prototype was cut by hand and assembled using glue and wood screws. You can see a write-up of the prototype assembly process in the post called "12π basshorn - Coming together". Information about the design is available in the post called "12π basshorn subwoofer". The ones we're making in the shop are from CAD drawings and cut on a CNC, so fitment is perfect. Makes alignment of the pieces much easier too. http://www.audioroundtable.com/emoticons/smiley.gif

http://www.pispeakers.com/Basshorn/12Pi_Side_and_Braces.JPG
Side panel and braces

http://www.pispeakers.com/Basshorn/12Pi_Side_Dado.JPG
Close-up view of motor chamber dado cuts

http://www.pispeakers.com/Basshorn/12Pi_Motor_Panels.JPG
Side panel and motor chamber internal panels

http://www.pispeakers.com/Basshorn/12Pi_Motor_Chamber_CNC.jpg
Motor chamber close-up

http://www.pispeakers.com/Basshorn/12Pi_Fill_CNC.jpg
Front chamber fill pieces

http://www.pispeakers.com/Basshorn/12Pi_Side_CNC.jpg
Side panel

http://www.pispeakers.com/Basshorn/12Pi_Braces_CNC.jpg
Mouth braces, close-up

http://www.pispeakers.com/Basshorn/12Pi_Rear_Open_CNC.jpg
Sides mounted, rear open

http://www.pispeakers.com/Basshorn/12Pi_in_Shop.jpg
Nearly finished, ready for drivers, cooling plugs and panels

http://www.pispeakers.com/Basshorn/12Pi_with_Brad.jpg
Brad examines his work


Re: The shop is crankin' out 12π basshorn subs! [message #49630 is a reply to message #49629] Thu, 15 June 2006 10:25 Go to previous messageGo to next message
spkrman57
Messages: 522
Registered: May 2009
Illuminati (1st Degree)
Sounds like it will be a great subhorn!

Great pics!

Thanks, Ron

The Most Powerful Subwoofer in the World [message #49631 is a reply to message #49630] Thu, 15 June 2006 10:57 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18669
Registered: January 2001
Illuminati (33rd Degree)

They're awesome. Did you see the results of testing at the Prosound Shootout last October? Highest SPL, lowest distortion. The push-pull driver arrangement works very well for reducing distortion at very low frequencies. The heat exchanger does an excellent job of removing heat from the motors. Power handling is increased over 225% and compression is reduced. Driver characteristics don't change as power is increased 'cause the voice coil doesn't get as hot. You can easily see it in the response curve - the 12π response curve looks the same at extreme power levels as it does at low and moderate levels. Other speakers (even horns) have a pronounced peak that develops at low frequencies when power goes up, an obvious sign of voice coil heating changing electrical Q of the motor. So there are a lot of pretty serious advantages offered by the 12π basshorn subwoofer. And build quality is great too. I'm really proud of it.

Re: The shop is crankin' out 12π basshorn subs! [message #49632 is a reply to message #49629] Fri, 16 June 2006 17:33 Go to previous messageGo to next message
Chris R is currently offline  Chris R
Messages: 133
Registered: May 2009
Master
Those are really cool!!! The wife wants a nice big flat panel TV. Do you think one of these would work for a stand?
Is there room to fit a center channel set in there too?

Chris


Re: The shop is crankin' out 12π basshorn subs! [message #49633 is a reply to message #49632] Sat, 17 June 2006 10:08 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18669
Registered: January 2001
Illuminati (33rd Degree)



Re: The shop is crankin' out 12π basshorn subs! [message #49637 is a reply to message #49632] Sun, 18 June 2006 19:56 Go to previous messageGo to next message
Spinjack is currently offline  Spinjack
Messages: 100
Registered: May 2009
Viscount
Actually, that isn't a half bad idea. How well does it work on its side? It might make a great coffee table.

Re: The shop is crankin' out 12π basshorn subs! [message #49638 is a reply to message #49637] Mon, 19 June 2006 00:09 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18669
Registered: January 2001
Illuminati (33rd Degree)

It works just fine on its side. When multiples are stacked, that's how most people set them up.


Re: The shop is crankin' out 12π basshorn subs! [message #49644 is a reply to message #49638] Tue, 20 June 2006 07:48 Go to previous messageGo to next message
Spinjack is currently offline  Spinjack
Messages: 100
Registered: May 2009
Viscount
Cool. I'm always keeping the WAF in mind.

"Those aren't speakers in the corners. They're plant/vase/sculpture stands."

"That isn't a subwoofer in the middle of the room. It's a coffee table."

See, these 'mainstream' high end speaker manufacturers just don't get it. The could all increase their sales by hiding their products in plain site.

Re: The shop is crankin' out 12π basshorn subs! [message #49645 is a reply to message #49644] Tue, 20 June 2006 08:15 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 18669
Registered: January 2001
Illuminati (33rd Degree)



Re: The shop is crankin' out 12π basshorn subs! [message #49678 is a reply to message #49629] Thu, 29 June 2006 20:25 Go to previous messageGo to previous message
derekdun101 is currently offline  derekdun101
Messages: 3
Registered: May 2009
Esquire
It seems you've got it down. I'm having trouble finding someone with a CNC macine who is willing to cut the piecs for me. Would you guys be interested? I need them soon for a show in August.
Lemme know.

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