What kind of Rears to use--Monopole/Dipole/etc, and where? Picture included - AVS Forum
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post #1 of 8 Old 02-18-2013, 03:14 PM - Thread Starter
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So I am trying to figure out what kind of speakers I should use as my rears, the traditional monopoles in the rear corners, or bi/dipoles somewhere else. The ceiling is 9' high, and the front mains would be sitting in bookshelves in the front, and the center would be under the TV mounted on the wall, and sitting on the fireplace mantel. What kind of speakers would you recommend, and where would you place them? The couch MUST stay were it is against the rear wall. I was told to put something like Klipsch RS42's in the rear corners (if I went with Klipsch speakers). I need some help as all the speaker placement guides give suggestions for when there is room behind the couch. Thanks!


~Shaun
Yamaha RX-V765 / PSB B5's Fronts / PSB C4 Center / Micca R-65 In-Ceiling Rears / BIC F12 Sub
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post #2 of 8 Old 02-18-2013, 03:46 PM
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I had a setup similar to that at one point. I'm not sure its a terribly good setup for the RS41s. If it were me I'd sooner use the RB41 (sticking to your mentioned brand only) and put one on the left and the other on the right side of the sofa in typical 5.1 surround fashion.

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post #3 of 8 Old 02-18-2013, 04:03 PM
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Bipolar speakers are only useful in certain types of situations; they don't work very well in most rooms.

My advice is to use the RB-41 speakers.
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post #4 of 8 Old 02-18-2013, 04:22 PM - Thread Starter
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Got ya. Thanks guys. Looks like monopole are the way to go. Any one else want to chime in?

~Shaun
Yamaha RX-V765 / PSB B5's Fronts / PSB C4 Center / Micca R-65 In-Ceiling Rears / BIC F12 Sub
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post #5 of 8 Old 02-18-2013, 04:30 PM
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Quote:
Originally Posted by commsysman View Post

Bipolar speakers are only useful in certain types of situations; they don't work very well in most rooms.
The OP's situation notwithstanding, that over-generalization is nonsense.

Craig

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post #6 of 8 Old 02-18-2013, 05:41 PM - Thread Starter
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What about bipoles or dipoles in the rear corners at a 45" angle so it spans both the rear and side walls?

~Shaun
Yamaha RX-V765 / PSB B5's Fronts / PSB C4 Center / Micca R-65 In-Ceiling Rears / BIC F12 Sub
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post #7 of 8 Old 02-19-2013, 05:19 AM
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Quote:
Originally Posted by border411 View Post

So I am trying to figure out what kind of speakers I should use as my rears, the traditional monopoles in the rear corners, or bi/dipoles somewhere else. The ceiling is 9' high, and the front mains would be sitting in bookshelves in the front, and the center would be under the TV mounted on the wall, and sitting on the fireplace mantel. What kind of speakers would you recommend, and where would you place them? The couch MUST stay were it is against the rear wall. I was told to put something like Klipsch RS42's in the rear corners (if I went with Klipsch speakers). I need some help as all the speaker placement guides give suggestions for when there is room behind the couch. Thanks!


Quote:
Originally Posted by border411 View Post

What about bipoles or dipoles in the rear corners at a 45" angle so it spans both the rear and side walls?
Dipoles would not work properly in that configuration. Dipoles have an acoustic null in their "forward" axis, and they are designed for the listener to sit in the null. When you turn them 45 degrees, you push the null torward the front of the room, and the listener is sitting in the more direct dispersion pattern of one side of the dipole. That might work, but it is definitely not how they are designed to be used.

Bipoles might work better because they don't have the null; they have a broad, even dispersion pattern. However, they would have different acoustic boundaries, with the left side being a tricorner, and the right side being open to the "rear" of the space. With this kind of asymmetry, monopoles are probably your best bet.

Use some kind of room correction system to set levels, distances, Bass Management and EQ, and monopoles are probably the best you can do. The primary listening position should be the spot directly in front of the display and half way between the surrounds.

Good luck.

Craig

Lombardi said it:
Perfection is not attainable, but if we chase perfection we can catch excellence."

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post #8 of 8 Old 02-19-2013, 05:51 AM - Thread Starter
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Thanks Craig. Upon doing more research that is what I found too, at least that seems to be the consensus among the majority of people. It just happens that the 2 seats that my wife and I use all the time (that recline with leg supports---comfy!) are in the prime listening position.

On my Yamaha receiver I have the YPOA (or whatever the letters are) that take everything into account. I am correct in my understanding that I should have the sound waves meet a few feet ahead of the listening position (point the speakers towards the front of the room slightly) to cut down on localization...they shouldnt be pointed directly at the seating position....correct?

~Shaun
Yamaha RX-V765 / PSB B5's Fronts / PSB C4 Center / Micca R-65 In-Ceiling Rears / BIC F12 Sub
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