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Re: 12pi bass horn plans [message #67861 is a reply to message #63735] Thu, 26 May 2011 02:39 Go to previous messageGo to next message
Fixvid is currently offline  Fixvid
Messages: 3
Registered: May 2011
Esquire
Thx for the plans Wayne.

Are there other woofers cheaper than the lab12 which could work in the pi12? IE: with lower power handling and spl, but eventually the same extension and low distortion? The goal of this project would be lower cost domestic applications.

What is your tought about using Selenium wpu1208 in 12pi?

WPU1208

Power handling 450W

Fs 46Hz

Vas 62l

Qts 0.35

Qes 0.36

Bl 19.4

SPLdB1W/1m 95
Re: 12pi bass horn plans [message #67863 is a reply to message #67861] Thu, 26 May 2011 09:11 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 17478
Registered: January 2001
Illuminati (33rd Degree)

The 12π hornsub uses a patented cooling plug/plate system that fits our OEM woofer. You can machine other parts to fit, but it is a non-trivial matter because you'll probably need to recone. I used to try and machine complete woofers, using the magnet to help capture the debris. But ultimately, there were too many failures going this route. It is best to machine the parts before assembly.

As for the electro-mechanical specs and suitability in that regard, I suggest using Hornresp to model the horn with your proposed woofer. I'm confident that it will give you an accurate picture. Then, of course, the real proof of the pudding is in the finished physical model. Measure it to see if it does what you want it to do.

Re: 12pi bass horn plans [message #67876 is a reply to message #63735] Fri, 27 May 2011 04:47 Go to previous messageGo to next message
Fixvid is currently offline  Fixvid
Messages: 3
Registered: May 2011
Esquire
I'm thinking about trying the pi12 in hi-fi applications, a woofer will be hit with no more then 400w, so i assume that the side radiators are not mandatory. Anyway, i live far far away from you and i can't buy any parts for this project.

Can you give me the horn parameters for hornresp ? it's not easy to calculate them from the drawings.
Re: 12pi bass horn plans [message #67879 is a reply to message #67876] Fri, 27 May 2011 08:45 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 17478
Registered: January 2001
Illuminati (33rd Degree)

Look through the links on the page referenced below. It shows the development history, and some links have Hornresp screen shots.
Re: 12pi bass horn plans [message #68103 is a reply to message #63735] Wed, 08 June 2011 13:14 Go to previous messageGo to next message
TruManagement66
Messages: 4
Registered: June 2011
Location: detroit
Esquire
Hi Wayne,


I'm very interested in trying out your 12pi speaker design. Could you please send me the plans?

Thanks
Dave
Re: 12pi bass horn plans [message #68105 is a reply to message #68103] Wed, 08 June 2011 18:37 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 17478
Registered: January 2001
Illuminati (33rd Degree)

You've got mail!

Re: 12pi bass horn plans [message #68268 is a reply to message #63739] Mon, 20 June 2011 19:38 Go to previous messageGo to next message
Robert.L is currently offline  Robert.L
Messages: 1
Registered: June 2011
Esquire
Greetings, where do I purchase plans for the PI 12 sub? Thank you for your time in this matter.

Regards, Robert L.
Re: 12pi bass horn plans [message #68269 is a reply to message #68268] Mon, 20 June 2011 21:30 Go to previous messageGo to next message
Wayne Parham is currently offline  Wayne Parham
Messages: 17478
Registered: January 2001
Illuminati (33rd Degree)

You've got mail!

Re: 12pi bass horn plans [message #68805 is a reply to message #68269] Mon, 01 August 2011 15:27 Go to previous messageGo to next message
TruManagement66
Messages: 4
Registered: June 2011
Location: detroit
Esquire
Hi Wayne,

I was wondering if the interior speaker connectors are needed or can I wire speaker direct to speakon and seal hole with silicone? Also, how do I know which version of plans that I have? I can't seem to find a version on the plans anywhere.

Thanks
Re: 12pi bass horn plans [message #68808 is a reply to message #68805] Mon, 01 August 2011 16:51 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 17478
Registered: January 2001
Illuminati (33rd Degree)

I would use an airtight connector on the inside to ensure a good seal. Motor chamber pressure is very high and it doesn't make sense to skimp on a build like this. As for version - The only plans we distribute are for the current version. There isn't a huge difference between v1 and v2 versions, by the way. I was being a perfectionist - this is a no-holds-barred design.

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