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icon5.gif  Info to compare Pi models [message #67085] Sat, 16 April 2011 23:46 Go to next message
NEO Dan is currently offline  NEO Dan
Messages: 5
Registered: June 2009
Location: Ohio
Esquire
Very Happy
I received the plans but I still have questions...
Where would I find general info like system sensitivity, impedance plots, and FR polar plots to compare Pi models.

Thanks,
The Nosy Bastard Embarassed
Re: Info to compare Pi models [message #67087 is a reply to message #67085] Sun, 17 April 2011 00:49 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 17580
Registered: January 2001
Illuminati (33rd Degree)

Basic specs are here:
More detailed specifications for the four π model (plans you requested) is here:
Other measurements you might find interesting are here:
You can see the measurement of the size and position of the forward lobe in the "Vertical Nulls" video in this post:The main differences between each model can probably be summed up in a couple paragraphs:

The small two-ways (one π / two π) are high-efficiency cone/dome speakers. They're great as surrounds or secondary systems. The two π tower is capable of deeper bass.

The three π and four π are matched-directivity two-way speakers. The six π and seven π are constant directivity cornerhorns. More information on the significance of each design type is in the whitepapers listed below. the eight π is sort of a hybrid, and can be thought of as an entry level constant directivity cornerhorn, although corner placement isn't absolutely mandatory on that design.

The biggest difference between the three π and four π speakers is the the midwoofer families available. This is also true for the six π and seven π cornerhorns. The three π and six π models use the Eminence Delta 12LF woofer in the entry level model, or the Acoustic Elegance TD12S woofer for the high-end upgraded model. The four π and the seven π speakers use the Eminence Omega 15 woofer or the JBL 2226, as an upgrade option. All models can use an Eminence PSD2002 compression driver or the optional B&C DE250 driver.

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