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Old 05-16-2012, 06:59 PM - Thread Starter
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I am sure there are good reasons not to do this but darn my Pioneer FS51s stacked tweeter to tweeter do sound great to me. I remembered my stacked Advents from thirty years ago and knowing my AVR supports "bi-amping" On a lark I used my rear speakers to try it out. I xover at 50 to an eD A5-350.
I admit this set up isn't "family" friendly. Any ideas why this seems to work?
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Old 05-16-2012, 07:16 PM
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It adds 6db of capability over a single speaker, which lowers distortion when the volume is matched to a single speaker set up. The issue would be severe off axis comb filtering when your head isn't centered on tweeter level.
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Old 05-16-2012, 07:24 PM - Thread Starter
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Thanks Jay...I do sit (reclined :-)) centered between the tweeters. Could this effect be helpful given my seating position?
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Old 05-16-2012, 07:54 PM
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If you like it that's all that matters, you won't truly know how the response is being affected at you position unless you measure it.
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Old 05-16-2012, 08:00 PM - Thread Starter
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One interesting thing to me is the set up now sounds better with a phantom center...imaging that good
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Old 05-16-2012, 08:18 PM
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Output has increased but you are getting a narrower dispersion profile due to destructive interference.
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Old 05-16-2012, 08:30 PM
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Quote:
Originally Posted by Mntallman View Post

I am sure there are good reasons not to do this but darn my Pioneer FS51s stacked tweeter to tweeter do sound great to me.

If you mean that the upper cab is inverted placed atop the other there's no reason not to do so, aside from eliminating the stereo image. Side by side, not a good idea.

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
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Old 05-16-2012, 08:51 PM
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How far apart do two speakers need to be to not have ill effect? If you have two monitors, can you use them spread apart instead of a center without ill effect? If not, what is the difference between that setup and a phantom center setup?

Absence of evidence is not evidence of absence

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Old 05-16-2012, 08:59 PM
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Quote:
Originally Posted by mrlittlejeans View Post

How far apart do two speakers need to be to not have ill effect? If you have two monitors, can you use them spread apart instead of a center without ill effect? If not, what is the difference between that setup and a phantom center setup?

Seems the many posters here feel that a phantom center is satisfactory for a relatively narrow seating position, but for a larger room with wider seating you need a point source center channel.

As far as distance between two speakers with downmixed audio, it depends on the dispersion characteristics of the speakers themselves. The double output of vocals is going to cause lobing somewhere, and locations where that occurs will shift as you move the speakers around.
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