| Using multi-subs to smooth bass response in room [message #53214 is a reply to message #53213] |
Sun, 15 February 2009 12:44   |
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Wayne Parham
Messages: 18786
Registered: January 2001
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Illuminati (33rd Degree) |
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Have you ever considered using multiple subwoofers? The multi-sub configuration not only provides deeper bass extension but also smoothes room modes.
I've used seven π cornerhorns by themselves in many rooms and been absolutely thrilled by their performance. But I can't think of any setup that isn't improved with the addition of multiple subs.
The π cornerhorn configuration provides the most uniform directivity possible. I know of no other loudspeaker configuration that can do better, because it sets the pattern and provides constant directivity all the way down to the Schroeder frequency, and offers improved imaging as well. However, below the Schroeder frequency, room modes dominate. Somewhere between 100Hz and 200Hz, room modes begin to set the positions where energy distribution is strong and weak, and certainly below 100Hz, the room becomes the primary determiner of bass response.
The π cornerhorn configuration can be improved using multiple subwoofers, just like any other loudspeaker setup. In fact, in some rooms, I suppose the improvement of bass uniformity may even be greater. Below 100Hz or so, the key is to have multiple bass sound sources blended together. You could install a pair of three π subwoofers in the corners opposite to your seven π cornerhorns. Alternately, use CARA to model the room and find out what placements work best in your room.
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