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52 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Sat, 18 April 2009 10:25 «»
By: Wayne Parham
Re: General evaluation of midrange drivers
If you entered the electro-mechanical parameters of the driver(s) and the specifications/dimensions of the horn flare, I would trust that Hornresp is giving you an accurate prediction of SPL and of amplitude response, at least at the lower end of the curv...
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Forum: Pi Speakers «»
Posted on: Sat, 18 April 2009 06:09 «»
By: adamzuf
Re: Electro-mechanical properties and diaphragm motion
Wayne,Thank you for such a detailed answer."Electrical damping is almost always an order of magnitude greater than mechanical damping"Sorry I don't understand the expression (English ain't my first language)"The difference is that in the pistonic range, t...
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Forum: Pi Speakers «»
Posted on: Fri, 17 April 2009 15:56 «»
By: Wayne Parham
Electro-mechanical properties and diaphragm motion
Qms does not describe the damping of the cone. It describes damping of the suspension. This is a very important distinction. I'll try to explain, generally, some of the details and how it all works together.Motor strength and electro-mechanical paramet...
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Forum: Pi Speakers «»
Posted on: Sun, 18 January 2009 23:44 «»
By: Wayne Parham
Re: Electro-mechanical formulas ( Thiele / Small )
Sensitivity (decibels @ 1W/1M) where
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Forum: Pi Speakers «»
Posted on: Sun, 18 January 2009 22:52 «»
By: Wayne-o
Re: Electro-mechanical formulas ( Thiele / Small )
What' s reference efficiency compared to the spl 1 watt 1 meter ?THANKS
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Forum: Pi Speakers «»
Posted on: Sun, 04 January 2009 18:31 «»
By: Wayne Parham
Electro-mechanical formulas ( Thiele / Small )
I stopped maintaining the VadCalc applet. It was written in a weird little language called CA Realizer (Computer Associates), which I also used to write tubing movement programs for the oil and gas industry. I do most of my programming in C++, but that ...
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Forum: Pi Speakers «»
Posted on: Thu, 23 August 2007 14:43 «»
By: Wayne Parham
Re: Basshorn Size
Hoffman's Iron Law states that the efficiency of a woofer system is directly proportional to its cabinet volume and the cube of its cutoff frequency. What this means is the most powerful subwoofer systems are necessarily large.What this formula says is y...
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Forum: Speaker «»
Posted on: Mon, 09 April 2007 14:30 «»
By: Wayne Parham
Hoffman's Iron Law
I'd say this falls into the realm of "Hoffman's Iron Law". First formulated back in the early 1960's by Anthony Hoffman (the H in KLH), Hoffman's Iron Law is a mathematical formula that was later refined by Thiele and Small, whose work now form...
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Forum: Speaker «»
Posted on: Thu, 03 August 2006 18:54 «»
By: Martin
Re: Disagree
"FWIW, describing a baseball's arc is not a trivial calculation in the real world."It really depends on what you are after and what accuracy you require. If you are interested in how far the ball will fly, or how high up it will go, when tossed by a outf...
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Forum: Speaker «»
Posted on: Wed, 13 April 2005 12:53 «»
By: akhilesh
Re: First Impressions
As usual, I agree with Martin & Wayne. The thiele/Small params are one of the few really good theories out there for speaker design, and are widely considered to have moved music reproduction from vodoo art to science, at least in speaker design (which ar...
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