Audio advice and discussions with audiophiles and professionals. Free discussion forums, open to all and frequented by industry experts. Ask questions and get advice on stereos, speakers, hi-end amplifiers, pre-amps, home theater, tube hi-fi, turntables, vinyl, tweaks, music, films, video, DVDs and more.
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
Basic specs are here: π Speaker System Prices, Dimensions and Specifications More detailed specifications for the four π model (plans you requested) is here: four π loudspeaker performance data Other measurements you might find interesting are here: π Speakers Measured Datasets You can see the measurement of the size and position of the forward lobe in the "Vertical Nulls" video in this post: Crossover optimization for DI-matched two-way speakers 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 B&C 12PLB100 woofer for the high-end upgraded model. There's also an intermediate option, which uses the Eminence Delta Pro 12. 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. High-Fidelity Uniform-Directivity Loudspeakers Speaker motors and passive crossover filters