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94 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Sun, 12 October 2003 10:43 «»
By: Duke
Impedance at resonance and tube amps
Wayne -If I understand correctly, the Theater 4 Pi works great with SET's and such; the Theater 3 Pi does not work well with tube amps (especially not SET's); and the Stage 4 Pi works pretty well with tube amps down to about 10 watts. Not having read ever...
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Forum: Pi Speakers «»
Posted on: Tue, 26 August 2003 14:11 «»
By: artsybrute
it's Greek to me
Hey, I'm just a hobbyist trying to build a speaker."Impedance can be found by measuring the voltage across the speaker motor and calculating the current through the circuit."X = 2πFL for inductive circuits. I assume I find resonance (and from this paper...
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Forum: Pi Speakers «»
Posted on: Tue, 26 August 2003 13:02 «»
By: artsybrute
Re: measurement answers
I guess I'm a bit thick."What we're looking for are impedance values at specific frequencies. So, for example, DC resistance is impedance at 0Hz and Zmax is impedance at the resonant frequency. Zmax is described by a frequency and an impedance."OK, I can d...
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Forum: Pi Speakers «»
Posted on: Tue, 26 August 2003 13:00 «»
By: Wayne Parham
measurement answers
What we're looking for are impedance values at specific frequencies. So, for example, DC resistance is impedance at 0Hz and Zmax is impedance at the resonant frequency. Zmax is described by a frequency and an impedance. If you measure voltage with a scop...
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Forum: Pi Speakers «»
Posted on: Tue, 26 August 2003 12:06 «»
By: artsybrute
measurement questions
Hi Wayne,Some questions regarding measuring speaker parameters:1. "So simply measure the DC resistance of the driver with an ohmmeter, and use the impedance found when measuring the driver's resonant frequency for Zmax." I'm missing something here. All...
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Forum: Pi Speakers «»
Posted on: Wed, 16 July 2003 09:46 «»
By: SteveBrown
Re: Damping
Thanks for the explaination. Makes more sense now. From previous posts it looks like this can be overcome somewhat with amp power. I'm anticipating wanting to try that Delta 12LF with tube amps from 8 watts up to 60watts. Looks like the zMax is 93ohms. Fro...
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Forum: Pi Speakers «»
Posted on: Sun, 29 June 2003 06:16 «»
By: Adrian Mack
Back EMF; Good or bad thing?
Hey Wayne,Just letting you know I've done heaps more research and found answers to a lot of my questions in my previous post. I have only questions on Back EMF/Damping Factor now, and I have two different views I've found on them, and I am unsure of which ...
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Forum: Pi Speakers «»
Posted on: Fri, 27 June 2003 21:11 «»
By: Adrian Mack
System and motor damping and some other stuff....
Hi everyone,I have some idea on this topic, but I've yet to find any real facts on what system and motor damping is, and also how the amplifiers damping factor relates to this. Maximum impedance affects motor damping and high amplifier damping factors are ...
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Forum: Pi Speakers «»
Posted on: Wed, 26 March 2003 15:23 «»
By: Wayne Parham
Re: Paramours and other goodies for LIMA
I'm anxious to play with the Paramours too. I've had lots of feedback from both the Bottlehead and Consonance (DIYHiFi) camps that the Theater four's and Studio two's are really great. I'll be trying lots of different speakers, but I think I'll find that...
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Forum: Pi Speakers «»
Posted on: Mon, 20 January 2003 12:31 «»
By: Patrick Kopson
Thank you
I found the Zmax data on the spec sheets, and that is all I really needed.
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