presence vs back channel

[mikeo1313]

I have this stuff:

yamaha rx-v2500
yamaha.co.jp/english/product/av/products/ht/rxv2500.html
polk t90e floorstanding {front}
polkaudio.com/homeaudio/products/t90e/
polk rm 7500 {5.1}
polkaudio.com/homeaudio/specs/rm7500/


I recently placed my couch against the wall and have no room behind couch for back channel.

That considered I was wondering what would be most recommendable since for HT. I have space on both sides of the couch.


back channel wiring recommendation:

1. should I put those back speakers in the area of presence but still wire them in the back channel on the reciever?

or

2. should I put them in the presence area and wire them in the presence channel on the reciever?

---------
alternative / just wondering:

side/back channel placement recommendation:

1. As per the diagram in the yamaha manual, supposedly the side has to be elevated, so I was thinking.... couldn't I mount all four on the wall, sides placed above the back... angled toward me?


Akind of the yamaha having automatic calibration, and considering it calculates sound distance... seems the back can be placed next to the fronts without a problem since it would adjust arrival time and you hear it anyway... but I'm just rationalizing and don't know diddly squat what would be the best move... Your comments are appreciated...

Thanks

 

[mpompey]

What I would do in your situation is run presence speakers connected to presence outs on the receiver, and dipole/tripole/quadpole surrounds to the sides of the seating position. Maybe bring the couch forward a few feet from the back wall. May give you room to place a second subwoofer in the back of the room.

 

[mikeo1313]

I looked into that dipole term... but my rm-7500 aren't dipole...

 

[mpompey]

I don't want to come off as an Axiom Fan Boy, but their QS6 and QS8 surround speakers are excellent. You may want to try those out in your situation.

 

[agarwalro]

1. should I put those back speakers in the area of presence but still wire them in the back channel on the reciever?

or

2. should I put them in the presence area and wire them in the presence channel on the reciever?

1. This makes no sense and might interfere with front soundstage
2. I recommend this option

couldn't I mount all four on the wall, sides placed above the back... angled toward me?

To meet DD standards, the placement of 7.1 speakers needs to follow this guideline,

Akind of the yamaha having automatic calibration, and considering it calculates sound distance... seems the back can be placed next to the fronts without a problem since it would adjust arrival time and you hear it anyway...

The receiver can compensate for distance but not for location. In conjunction with the speaker placement guide, to have the correct multi-channel sound stage, it will not be possible for you to place the rear sourrounds next to the fronts.

 

[agarwalro]

QS6 and QS8 surround speakers are excellent. You may want to try those out in your situation.

I believe for Back Surround speakers in a 7.1 config, it is recommended to use Monopoles.

 

[mpompey]

I believe for Back Surround speakers in a 7.1 config, it is recommended to use Monopoles.

But I think his situation is his seating location is too close to the back wall for back surrounds to be effective. IF he moves his couch out from the wall a bit and places multipoles to the side he should be fine.

 

[agarwalro]

I recently placed my couch against the wall and have no room behind couch for back channel.

If you do not have room from Rear surround, stick with 5.1.

Maybe bring the couch forward a few feet from the back wall.

Or as M recommended, move the couch away from the back wall. I believe at least 5-6 ft is needed for proper sound stage.

But I think his situation is his seating location is too close to the back wall for back surrounds to be effective. IF he moves his couch out from the wall a bit and places multipoles to the side he should be fine.

I donno, but if he has the money and time, no harm trying it.

 

[mikeo1313]

Thanks everyone for the feedback.

That diagram will sure come in handy.

I talked to Yamaha tech support, they suggested that things will work out great with the rears mounted against the wall elevated at 6ft angled @ listener and sides @ sides facing eachother. To not worry, everything will be just fine since the reciever does automatic calibration, and that it should sound great.

A Polk audio tech support rep suggested the very same thing, when I mentioned angling the speaker to him, {I didn't mentioned having talked with yamaha to him} he said it isn't needed, the reciever does automatic calibration and will be more diffused, to not worry, he personally said he thought it would work out just great also.



The wall mounts I got I can angle them downward if I wanted + doesn't sound like a bad idea, I guess its just a matter of giving things a try and taste from this point onward.