Gilbert, thank you.

To be honest, this room need acoustic treatment, which is literally impossible for any living room.  So its only good to look at, but not so acoustically.

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I think I should add the following things:

I have embedded two different speaker cables for the HT system.  One is the generic brand rated at 14AWG 100ft from Pro-cable Direct from Ebay. Another one is 60ft of Monster Cable for the main surrounds, thats the one I am using now (refer pic below).  The other two is a backup wiring at the back for possible future upgrade to 7.1 if necessary.

Getting them both brand new through eBay proven to be cheaper than getting them locally, although just a bit.

Subwoofer cable is also a 12 feet Monster Cable Sub cable with THX rating.  Just like the rest of the counter part, it's 2nd hand  ! Thanks lowyat forum for that.

The wall behind the hifi system has been soundsproofed with Rockwool wthin the 3 inch partition. 


By having a decent wiring embedded, at least I don't have to worry about changing the wire again for quite some time to come, unless I am poisoned by the 'wrong gang' - ie. the speaker-wire-the-size-of-my-colon gang. 

The rockwool will help to reduce bass to your neighbour, but won't eliminate totally.

Well, the simplest way and not costing you anything is turning the volume down.   
Occasionally during weekends (day time not late night) you may blast as you like.
My AV room is located exactly like yours but my neighbor advise the same as above???
Also try increasing your frequency as low frequency (loud base) tend to travel quite effectively next door.

Just read your message.

After installing, I actually can insulate my hifi noise away from my neighbours, and their Majong noise away from me
Seriously !

For sound insulation, I suggest that you may want to know this fact: Best sound insulation is vacuum, followed by air, then liquid, last is solid substance. 

Since you can't create a vacuum, second best is to create a layer of still air, as suggested by Pierreye.  Create a airwall helps a lot, as in double glazing windows.  Using rockwool actually generate a layer of air-filled layer that hindered noise passing from one surface to another.  So the thicker it is, the better the sound insulation. 

Why don't you consider putting either foam on your wall if you just want to insulate your specific hifi room, and paste on some sound insulation material as in this ( Click the forsale link here )for your acoustic treatment?

I did not use foam because my wall is in the sitting room.  My wife will kill me then fed my body to the dogs if I do that.

u running 120" from 13 feet viewing distance!?!??!

u must be one of those guys that like to sit in the front row in the cinema!

anyways...awesome set up!

My front cabinets where the devices are - the glass is tinted black so you can hardly see any light coming through.  I didn't have space at the side otherwise I may have just kept everything on the side.

Thanks

120" screen from 13' away is near the limit. It's doable if you like the 'up front' experience.

Are you running 5.1 or 7.1 setup?

Yes, it is advisable to have the rear speakers a few feet away from your seat.

A 7.1 setup uses 1 subwoofer.

The main factor will be your seating distance. At 12.5' away you can take 100"-110" screen.

Generally speaking you should aim for minimum a 30-degree field of view.

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Added on August 16, 2010, 10:16 pm

You can install any number of subs. There are fellas on AVS who have 8 subs!

Having multiple subs can help to even out the frequency response and also improves the performance headroom.

What's your budget?

It would be above RM10K for a midrange avr, 5 speakers and a sub.