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I'm building a 7.1 HT from the start. I have a 20.5 x 14.4 feet rectangular room which will be used only for HT. I'm thinking of using some kind of HT chair (large chair with foot rest), so I'm thinking of having at least 2 rows of chair, being the farest at a higher level.


I will be using dipoles MK THX surrounds. How should I determine the placement of the chairs and the 4 surround speakers in the room? I guest the last row cannot be very close to the back wall where the back surround speakers will be, right? If I had only one row of seats, the side surrounds would be placed right at the sides of the listening position, but what should I do when I have two or more rows? Should I keep the sorrounds in the middle position between the rows or should I keep it at the side of the last row?


Can someone please indicate me row should I position the seats and surround speakers in my room?


By the way I think I will be using a 54"x96" Grayhawk screen with a Sharp 9000 DLP projector.


Thanks,
 

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I agree with Jim that they should go next to the rear seating and close to a meter above your ears. In my case I have two rows so I put speakers next to each row. So two on the right and two on the left (hey that is what the do in real theaters).


For the rears they are typically 30 degrees off center and about a meter up as well. You can look at various sites and reasonable receiver manuals like http://www.onkyo.net/pdf/manuals/uk/tx-ds787.pdf or http://www.del.denon.com/catalog/pdfs/AVR5800DFU.pdf to see this setup.
 

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Discussion Starter #4
Quote:
Originally posted by ScottF200
I agree with Jim that they should go next to the rear seating and close to a meter above your ears. In my case I have two rows so I put speakers next to each row. So two on the right and two on the left (hey that is what the do in real theaters).


For the rears they are typically 30 degrees off center and about a meter up as well. You can look at various sites and reasonable receiver manuals like http://www.onkyo.net/pdf/manuals/uk/tx-ds787.pdf or http://www.del.denon.com/catalog/pdfs/AVR5800DFU.pdf to see this setup.
Scott, How do you feed the extra pair of surrounds? As for what I know, there are no Pre-Amps or Receives that decodes a 9 channel surround (4 side surrounds + 2 back surrounds)?
 

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With my Lexicon in 7.1 mode the two sides and rears create a surround field from all four speakers. This gets tricky with dipoles. You may have to play with this but I would suggest putting the sides slightly behind the first row. The rear speakers will help create the 3d surround effect. I think the interaction between the two sets of speakers will compensate for the misplacement of the null position.


This is assuming that you are running seven channels instead of 5. Bottom line though, play around and see what YOU like.
 

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My systems is not completed yet (see my sig) but I bought the Denon 5800 because it has surround speaker pairs A and B in addition to the surround back (THX-EX/DTS-ES).


I'm using Klipsch RS-3s for the sides and rear which don't take a lot to power.


See Denon 5800 manual (page 13) has a diagram. http://www.del.denon.com/catalog/pdfs/AVR5800DFU.pdf I've seen/read where others use/require a seperate component/amp to drive 4 sides. Pluses and minuses I suppose.


Also see around pages 25 and 26 'setting the channel level'. It states "When using both surrounds speakers A and B, their playback levels can be adjusted seperately". Sweet.
 
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