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18 Search Results Found |
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Forum: Pi Speakers «»
Posted on: Tue, 14 January 2020 17:40 «»
By: Wayne Parham
Re: Flanking subs
Your flanking subs should work well there. I visualize the mains on stands, toed-in 45°. The flanking subs are just outside, on the floor. Each of the mains and its flanking sub are pushed out nearly to the side wall. This is a good setup. Then put ...
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Forum: Pi Speakers «»
Posted on: Mon, 02 May 2011 08:10 «»
By: Wayne Parham
Re: Back EMF?
I appreciate the nod and I hope nobody was offended.
Putting personalities aside, just looking at the facts, it really isn't accurate to say a 12" or 15" woofer is more or less likely to generate greater back-EMF than a woofer with smaller c...
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Forum: Pi Speakers «»
Posted on: Sat, 23 April 2011 03:05 «»
By: Wayne Parham
Re: Back EMF?
Back-EMF is the voltage produced when the mass of motor causes it to act as a generator after the drive voltage has shut off or reversed. It is a real concern in some cases, but not in high-efficiency speakers like these. The electro-mechanical propert...
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Forum: Pi Speakers «»
Posted on: Sun, 18 July 2010 09:20 «»
By: Wayne Parham
Re: Pi 4.5 possible?
With 2226H (8Ω) woofers, you can connect the midwoofer directly to the output of the crossover PCB, and tie another using a large value coil in series. The first woofer is the midwoofer, outputs connetced directly. It is the only load "seen"...
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Forum: Pi Speakers «»
Posted on: Thu, 11 February 2010 21:38 «»
By: Wayne Parham
Re: 7 Pi impedance range
It really is a nice impedance curve for tube amps, without any real peaks. It's scaled to show what little fluctuation is there, but you'll notice minimum impedance is 5Ω and max is about 13.5Ω. That's really good. Most loudspeakers have peaks of at l...
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Forum: Pro Sound «»
Posted on: Thu, 28 August 2008 16:08 «»
By: Wayne Parham
Re: ??????Can any of you tech's help?????
Each speaker should probably have voice coil resistance of 5Ω or so. A speaker advertised as having 8Ω average impedance usually has DC resistance of around 5Ω. I suppose they could be 4Ω or 16Ω, but in any case, DC resistance would be between 3Ω and 1...
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Forum: Pi Speakers «»
Posted on: Thu, 10 July 2008 17:40 «»
By: Wayne Parham
Loudspeaker impedance curve - Zmax and tube amps
If the amplifier has high damping factor (low output impedance), the impedance curve won't matter much. But amps with higher output impedance will interact with the load impedance and may cause some amplitude response fluctuation. Single-ended tube amp...
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Forum: Pi Speakers «»
Posted on: Thu, 28 September 2006 20:44 «»
By: Wayne Parham
Re: Wayne - What are the fundemental differences between ....
First off, I guess I should point out that there is no Thermionic four π loudspeaker. There used to be, but I pulled it from the line a couple years back. It was very large, and I felt it was just too big. The Q of the Alpha 15 driver is so high it ne...
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Forum: Pi Speakers «»
Posted on: Wed, 23 November 2005 15:15 «»
By: Wayne Parham
Re: Thermonic 3Pi Plans
I like all three. If you were running a solid state amp, I could nail this down a bit more but with tube amps, there is more difference between amps. So the best thing to do would be to hear all three and decide for yourself.
With a pretty constant ...
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Forum: Speaker «»
Posted on: Mon, 11 October 2004 14:26 «»
By: Martin
Resonances!
Hi Wayne and akhilesh,I have not been following your thread until this afternoon. Resonances are alway of interest so I will chime in with my take on resonances and how they change the driver's impedance curve. If you see a peak in th driver's impedanc...
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