dual wall construction is quite normal in european countries as it provides a good insulation between the outside and inside wall. lots of people are reporting good feedback from the use of such construction method to provide a sound barrier between walls.

it's quite unheard of in this country because people don't really need to have a good insulation to the outside. it's used quite extensively in the construction of modular building and industrialized building systems. the government are trying to push ibs for local adoption. and with ibs building material (composite wall sandwitched by concrete) dual wall would be a normal thing especially for multi storey building as a single ibs wall don't have enough load bearing capacity to support multiple storey on top of it.

but i guess a hifi salesman would know nuts about building construction.

8TC: I get more black background, wider sound stage (more separation) and a laid back warmer sound compared to my previous Taralabs RSC Gen II.

In my defense, I did felt a bit of belittlement when my question about dual wall got dished out before there’s even any discussion about it.

The reason being for my question is that I consulted my wife about the viability of constructing a basement home theater room as jchong’s, but my wife did said that it’s not advisable especially in the proposed location as there’s a clear risk of water seepage.  The fact that it’s so close to the sea waterline and the rise of waterline during high tide to about a feet above land level makes it even riskier.  The location is also flanked by paddy fields and a river. Porous land, paddy fields, a river and less than 50 feet from the waterline. Bad idea.

Not that it can’t be done, but it will require lots of properly planned water insulation material. Even then there’s still no guarantee it will stop water from reaching the interior walls. The material will eventually fail in time, just like the problem with upstairs toilet. So the basement idea had to go.

I was thinking of dual wall construction as it may be better in stopping sound from penetrating to the adjacent room as the idea is to put the ht room next to the main bedroom. The ht room with be at a corner thus needing dual wall erected only at 2 wall facing the interior. If people would consider erecting a false wall using plywood inside their ht room, dual wall with brick would require even less space to build.

I know this is not a construction forum, but thinking that this had something to do with home theater I’m hoping it’s not out of place to be discussed.  Any constructive criticism would be much appreciated. No pun intended.

humidity is a major concern especially near the sea. someone did mention before this  that the speaker cone damage is accelerated in humid condition. i'm guessing it'll be a lot worse in a hot and humid weather.
thanks for not quoting the spoiler. snippet removed.

I have a dehumidifier running in my basement and also an HEPA air filter and for the odour. They solved the humidity and odour problem effectively.

I only run the thing like 2 times at 4-6 hours per week.

and my TNB bill only around RM50 per month....so don't care lar   

Correct if I am wrong. Metal elements products will also susceptible to faster corrosion since it is near the sea. This in general and not withstanding auido/visual equipments alone.

Mpyw - Are you kidding?....my small house TNB bill also at least RM450/month.

Jchong or any lyn HT kaki: what is the cost of building a Underground basement for a room about 20'x 14'.

I have heard about land beyond 4 ft below ground level is no longer belong to house owner, is that true?

Thanks,, I am aware of the piping problem which have to reroute, but didn't know the 4ft rule,, if that's the case no point doing as I am thinking about digging 10 feet under.

IMHO, building a basement would be quite impossible for a terrace house. For a Semi D and bungalow, I guess one needs sufficient land to work around it. Messy but the end result could be very rewarding. The need to dig deep down as well as the foundation of the existing house are the main problems. Even if there is a way around it, it would not be a cheap affair. Correct me if I am wrong.

Oh yes, is there any need to do a soil test under the law for a basement project?

Sound very messy building a basement  ,, better built the extra room and put the garden on top of it.

I will travel to US in February 2012 and plan to carry Emotiva power amp.

Tested the HT-3 and it improves the soundstage even better. Vocal opens up even more now. The midrange for the front has a lot more oomph. The rain and fire have more body to it in Knowing's plane crash scene. As for Pearl Harbor, the roaring engine of Zeroes are even more realistic and more grunt to it.

Hi to All HT Sifu..

Just 1 noob question here..normally what is the correct position for subwoofer. What I mean is, the front of subwoofer need to facing the audience or wall?

jchong,
Did you get your center yet?
Sure would like to have a listen to your dual Ultra set up.