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393 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Thu, 13 February 2014 11:07 «»
By: gstarey66
Re: Speaker stuffing
Thank you wayne and guys for the feedback.
I did try to keep the size exactly the same as the standing waves / nodes thing worried me. Believe adding to the bracing would move the frequency of the nodes up and decrease the level some, which seemed re...
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Forum: Pi Speakers «»
Posted on: Fri, 07 February 2014 12:08 «»
By: Wayne Parham
Re: Speaker stuffing
You know, the virtual size increase is really a Helmholtz thing. It's measureable, and it happens, but I don't care about that part nearly as much as I do the internal standing waves. As long as the changes you made don't cause ripple in the upper midb...
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Forum: Pi Speakers «»
Posted on: Tue, 21 January 2014 09:55 «»
By: Wayne Parham
Re: 3Pi Speaker plans request
As long as you're comfortable with measurements and can do the design work yourself, that sounds like a fun project. You can still depend on the crossover to work as expected provided you keep the woofer/tweeter spacing the same.
As I said earlier, j...
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Forum: Pi Speakers «»
Posted on: Tue, 21 January 2014 08:02 «»
By: Wayne Parham
Re: 3Pi Speaker plans request
Don't change the cabinet dimensions unless you have measuring equipment and can verify the changes made. Cabinets this size develop standing waves in the lower midrange, so dimensions and woofer and port position are important. You do not want a pressu...
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Forum: Pi Speakers «»
Posted on: Wed, 25 December 2013 01:35 «»
By: Wayne Parham
Re: 4pi Baffle length
Oil filled caps are great, but don't change the cabinet dimensions or the port. There's a lot of R&D invested in these, and if you modify them, you throw that investment out the window.
It's not so much the Helmholtz frequency I'm worried about, ...
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Forum: Pi Speakers «»
Posted on: Wed, 06 November 2013 14:59 «»
By: Wayne Parham
Re: pi4 / pi12
If you're going to use subs (as recommended) then there is no point in increasing the volume of the mains.
The problem with changing the dimensions is you have to check internal standing wave nodes, to make sure you don't introduce an anomaly in the l...
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Forum: Pi Speakers «»
Posted on: Mon, 05 August 2013 14:06 «»
By: Wayne Parham
Re: Old question, but what's in the 3-Pi sub kit?
Small subs like these are not picky about dimensions. They are acoustically small and so standing waves don't setup inside. As long as the box is the right volume and the port is the right length and area, it will be fine. Also, no insulation is requi...
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Forum: Pi Speakers «»
Posted on: Fri, 26 July 2013 15:46 «»
By: Joe Sever
Re: 4Pi crossover study
Tried the other CD I had on hand, and the results floored me:
While I have some work to do on the cabinets (bracing, damping of standing waves, etc.) and perhaps more traps in the room, I think we're done here. That said, I'm always open to suggest...
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Forum: Pi Speakers «»
Posted on: Wed, 24 April 2013 11:17 «»
By: Wayne Parham
Re: An amazing listening session with the H290C
There are a couple of mathematical abstractions in electronics, the voltage source and the current source. Basically, an ideal voltage source is one that has zero internal impedance and the ideal current source has infinite internal impedance. In pract...
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Forum: Pi Speakers «»
Posted on: Tue, 23 April 2013 13:28 «»
By: Wayne Parham
Re: An amazing listening session with the H290C
Could be a lot of things:
1. Different compression drivers. The rear chamber can be sized to provide reactance annulling, which will smooth response down low. It sort of fills in the first hole, right above cutoff. But in truth, this is probably n...
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