What are the speaker placements for 7.1 HT setup?

Bruceomega,
My apology, some of your acronyms have eluded my
understanding. I must confess I'm a complete beginner
in HT. What is DLPII and DLPIIx? Are the differences
significant enough to yield my purchase of the MX-134
a plunder? Could be my interpretation, but I'm reading
the matter as MX-134 can only deliver pseudo 7.1?

You'll do well enough with just Dolby Prologic II, go into dolby's web site and if you have any doubt come back here.

..."Go to Dolby's web site, and they explain the various set-ups for 5.1, 6.1, 7.1, and PLII.
www.dolby.com"
Teonyc

This is not bad starting advice, as a good point of reference and suggestions. However, to be true, each setup/room is different, and there's A LOT OF VARIABLES TO CONSIDER! If you don't know what you're doing, you'll be getting hodge-podge sound from all your speakers. Placment is a balance of getting a properly scaled soundtage perspective, and simultaneously getting basically "flat frequency response"(and even response) from all the speakers! Anything else will give you lackluster performance for certain!(what everyone ends up with doing it themes, themselves sadly..I know Basically, as I've been doing this for years for a living)
All the other variables will then need to be considered, like proper toe-in, "aim", and acoustics considerations.
Basically, you're better off(especially since you spent all that money on gear) haveing someone consult you for best. Otherwise, spend years learning and studying, tinkering and tweaking. Bottom line, much more info is needed to recommend for ANY ROOM/SETUP!
Telling someone to stick your speakers at such and such a distance or location in your room is all relative. Also, each speaker is different, and reacts differently in the room. It all must be considered, as the room/setup/acoustics/tweeking/etc, all add up to easily 2/3's of the performance...no joke!
You spent hard on the gear...I suggest considering spending even wiser on the more critical setup/acoustics proceduress if you want anything remotely resembling world class sound!
Yes, equip makers would love you to think that simply buying gear is the answer to world class sound...seasoned audio experts know different. And you'd be amazed at how many (guy's especially) people think they can buy some fancy gear, stick it in a room, and think they have the best sound!...they're wrong....most end up with poor sound, I garantee it, sadly.
As for your gear choices, your gear is fine. You could alwasy tinker with power sources and wires and such. But otherwise that's good stuff. However, like most, the speakers really should be chosen first, as they're the most important in the gear. You then should match gear to match! That's correct normally. But, it's all workable if need be. Good luck

Basically, it is needed to know your room dimmensions, layout, basic acoustical properties, and all the variables in the room, seating locations, etc. All this will make it easier to point out speaker options really.

Kee_tan

My comments are focused on the question of a 5.1 vs 6.1 vs 7.1 speaker system.

My recommendation is to go with a 7.1 speaker system, unless you have a physical layout that just will not support 7.1. If you cannot do 7.1, then I recommend 5.1. I do not recommend 6.1. The general layout for 7.1 speaker placement is a guide. The best implementation in your particular room can vary.

If you do decide to go 7.1, and want to maximize the 7.1 listening experience, then I further recommend you have surround processing that can generate 7.1 outputs from the various input sources available (2.0, 5.1, etc.). This is needed, in my opinion, because:

- There are no 7.1 sources available at the present time

- You do not want to simply duplicate the surround information in the side and rear channels

The two best choices for 7.1 surround processing are Dolby Pro Logic IIx (DPLIIx), which is available on a variety of receivers and PrePros, and Logic 7, which is available only on Lexicon products, some/all Harmon Kardon receivers, and I think a JBL PrePro.

Dolby Pro Logic II (DPLII), the predecessor of DPLIIx, will only generate 5.1 outputs. If you are using a 5.1 speaker system, then DPLII is fine, but if you use a 7.1 speaker system I highly recommend DPLIIx instead.

Thanks
Bruce