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Re: 4 Pi and 7 Pi bass response- More similar or different? [message #62116 is a reply to message #62115] Tue, 16 March 2010 21:15 Go to previous messageGo to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18789
Registered: January 2001
Illuminati (33rd Degree)

Without corners there is much less advantage going with something like the seven π cornerhorn or a similar three-way speaker having the same midhorn and a front-firing woofer. The midhorn was really designed to be used in a corner, and while it doesn't lose all directivity control outside a corner, it can't maintain the horizontal below about 500Hz. It actually starts losing control around 750Hz and by 400Hz, the pattern has doubled in width, basically acting pretty much like a large flat baffle at that frequency. That's still decent control, over an octave lower than without the midhorn, and there is the matter of distributed sound sources in the upper modal region. So there are some benefits, even when used outside corners.

But it's a more complicated speaker than the four π. The simplicity of a DI-matched two-way loudspeaker is pretty attractive, having its own set of merits. For the difference in cost, you can get some subs and I would prefer four π's with subs to seven π's without. Of course, the cat's meow is seven π's with multisubs but that requires a very specific room layout, having relatively unobstructed corners and distance between them that allows their forward axes to cross in front of the listening position. That's the only problem with the cornerhorns - you need a specific room layout to use them, and not every room has that.

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