| Pi2 and woofer directivity [message #64540] |
Thu, 28 October 2010 14:15  |
RDLewis
Messages: 15
Registered: September 2009
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Chancellor |
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Hello Wayne,
Over the years you have written many pages on matching sensitivities, phase, directivity, etc, using 2way woofer/CD horn systems, but I have not seen a lot in a similar vain on the Pi1 and 2?
You discribed the crossover of the "1" and "2", as using a "pseudo" first order for the bass levels off the rising Fq response and a cap and shunt resistor on the tweeter. I presume this goes someway to getting the phase right(?). But I would be very interested know how you set out to achieve your favored "controlled directivity" with a domed tweeter? Or had other objectives with above?
You have mentioned that Pi2 Towers are in regular use in one of your systems and I see they are at the top of the list of best sellers. So how do they compare with the more expensive proper CD Horn in imaging and control?
I would be grateful if you could enlighten us all.
Thanks
Roy
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| Re: Pi2 and woofer directivity [message #64542 is a reply to message #64540] |
Thu, 28 October 2010 15:04  |
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Wayne Parham
Messages: 18787
Registered: January 2001
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Illuminati (33rd Degree) |
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The one π, two π and two π tower speakers are popular for three reasons: (1) They sound good, (2) are inexpensive and (3) efficient. They provide plenty of good, balanced sound with little power input and they don't cost a lot. Their impedance curve is pretty flat too, so that, combined with their high sensitivity makes them work well with tube amps as well with solid state receivers.
These speakers don't provide constant directivity, so their imaging isn't nearly as good as the larger models. Room coverage isn't as uniform. They're more traditional cone/dome loudspeakers, designed to be listened on-axis. But they're great for surrounds or for secondary or budget systems. I like the bookshelf model for surrounds, and the tower model for applications where they're used as mains, like a bedroom system.
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