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2Pi Speakers [message #92281]

Wed, 09 September 2020 08:58

gnanamu
Messages: 7
Registered: September 2020

Esquire

Hi Wayne,

I am looking forward to build Pi Bookshelf or Tower. Actually I liked 4 Pi, but I do not have much experience on Speaker building on my own, so I will stick to 2 Pi speaker now it looks simple overall, maybe someday I will try to build 4Pi. I have sourced the driver parts for 2Pi here in India.

Can you please share Plans for both bookshelf and tower.?

Thank you,
Gnana

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Re: 2Pi Speakers [message #92298 is a reply to message #92281]

Wed, 09 September 2020 14:07

Wayne Parham
Messages: 18783
Registered: January 2001

Illuminati (33rd Degree)

You've got mail!

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Re: 2Pi Speakers [message #92554 is a reply to message #92298]

Tue, 03 November 2020 12:02

gnanamu
Messages: 7
Registered: September 2020

Esquire

I decided to build 2pi bookshelf, towers seem to be huge. Completed the build this weekend. It sounds awesome, I Love the speakers.

Thank you so much for the Plan. I have added some of the pictures here.

Gnana

/forum/index.php?t=getfile&id=2660&private=0

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Re: 2Pi Speakers [message #92556 is a reply to message #92554]

Tue, 03 November 2020 17:44

Wayne Parham
Messages: 18783
Registered: January 2001

Illuminati (33rd Degree)

Those look very nice. Very nice indeed!

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Re: 2Pi Speakers [message #92581 is a reply to message #92281]

Sat, 07 November 2020 18:45

tom-m
Messages: 56
Registered: December 2009
Location: Texas

Baron

Yes, a very nice build. Thanks for posting pics!

tom

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Re: 2Pi Speakers [message #92584 is a reply to message #92581]

Sun, 08 November 2020 10:26

gnanamu
Messages: 7
Registered: September 2020

Esquire

Thank you Wayne, Thank you Tom-m.
Here a few more pics.

/forum/index.php?t=getfile&id=2665&private=0

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Re: 2Pi Speakers [message #92679 is a reply to message #92281]

Sat, 28 November 2020 05:59

gnanamu
Messages: 7
Registered: September 2020

Esquire

Wayne, I am planning to build 1Pi for surrounds, apart from size any difference in crossover and port size?
Also, I want to build a Center speaker like MTM style below the screen because of the space constraints. thinking about using a 2 Alpha-6C (4 ohms) with DX25 tweeter. would the same crossover suffice?

Thank you,
Gnana

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Re: 2Pi Speakers [message #92680 is a reply to message #92679]

Sat, 28 November 2020 09:21

Wayne Parham
Messages: 18783
Registered: January 2001

Illuminati (33rd Degree)

The one Pi and two Pi use the same crossover and tweeter, but the midwoofer, box and port are different.

As for a center channel, I wouldn't suggest a horizontal arrangement because the lobes and nulls spread out horizontally, making the whole listening area be covered with them.

You might consider using a coaxial speaker.

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Re: 2Pi Speakers [message #92730 is a reply to message #92680]

Thu, 03 December 2020 09:43

gnanamu
Messages: 7
Registered: September 2020

Esquire

Thank you, Wayne

I was looking into a few Coaxial drivers from Celestion FTX0820 and others. https://celestion.com/product/147/ftx0820/
frequency response is not smoothest, lots of dip and bumps. Does this mean the response of the speaker builds may also have the same problem?

What about BETA-8CX with ASD:1001, will it possibly match the 2PIs?

Now I read a little about lobes problems of the horizontal alignment of double woofers for the center channel. Just curious, if we move the woofers close to each other and move the tweeter up will it improve the lobe and null problem?

BTW, please share 1Pi plan.

Thank you
Gnana

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Re: 2Pi Speakers [message #92731 is a reply to message #92730]

Thu, 03 December 2020 10:01

Wayne Parham
Messages: 18783
Registered: January 2001

Illuminati (33rd Degree)

Putting the drivers closer together moves the nulls out further. But the size of the radiators prevents them from being close enough to move the nulls very far. So there is no way to make a horizontal array without having troublesome nulls.

The Beta-8CX might be a relatively close acoustic match. But the one Pi definitely would be, so I've sent plans.

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