| Amp [message #53212] |
Sun, 15 February 2009 06:33  |
Zene Gillette
Messages: 88
Registered: May 2009
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Viscount |
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Wayne ... Is asking for amp suggestions for the PI 7 (bass unit only) too broad of question? So far my Hafler 120 is fine, but not seeing punch. Speaker is P.Audio 150/2226. Will have JBL 2226 soon.
Zene
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| 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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| Re: Using multi-subs to smooth bass response in room [message #53215 is a reply to message #53214] |
Sun, 15 February 2009 19:14 |
Zene Gillette
Messages: 88
Registered: May 2009
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Viscount |
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Wayne ... Sage advice, you always keep me from spending money in the wrong place. What I am missing is that gut wrenching output I got in the late seventies (yes, disco too) from my SpeakerLab cornerhorns with a bunch of horns above that. Just so happens I am experimenting with some very small sub boxes, not small speakers, though. Should be perfect for multiples. Zene
P.S. Just to stir up trouble, I'm so tired of the coffin/single driver box crowd I could spit. Clean and refined, but when have you ever been to a concert that did that except for some tiny ensemble?
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