My rooms sound problems....help

[micb3rd]

Hi basically I am converting my Bedroom into a small personal Cinema, it it a small room cinema it is 10.5 ft by 10.5 ft by 7 ft in size.

I am bulding the sound system slowly but the the moment I use Mission M73 floorstanding mains and have a fairly nice Denon amplifer to power them.

The main problem is that the treble has a twang sound to it both on DVD's and 2 channel music.

If I clap my hand in the room I get a nasty hi pitch twanging sound.

The if I rememmber correctly the room had some work done to it about 5 years ago extra plasterboard with a reflective rear metal like substance on the back (Like Kitchen foil) was built up over the top of the prevous walls of the room.

I was wondering if some sort of Treatment, cloth or curtains could be used to tame my treble colouration.

Can anyone help me?

[micb3rd]

Oh yes and one more thing, the twanging seems to come from the corners of the room.

[RichardH]

It does sound like you have too many hard surfaces in there - is the floor carpeted or not? If not, I'd get a decent sized rug down, and maybe experiment with a couple up on the walls - or maybe thick curtains.

Can't imagine that the plasterboard you mention would be the cause.

Not sure how much help this is, but good luck!

[micb3rd]

Yep I have a think carpet on the floor, I was thinking of covering the wall closest to the speakers and having a dead end down there and a live end up with me.

[RichardH]

I'm suprised that you're getting that much out of the room if you have a carpet down already - I'd try dumping some big cushions from your sofa or something in there and seeing if it makes a difference - be a pain to buy a load of extra stuff and it not make a difference....

[Gary Lightfoot]

A 'rule of thumb' is to have the 'screen wall' end of the room absorbtive (sp?) and the side walls below ear level too. The rest should be live.

I did this by putting carpet on my screen wall, and onto the walls up to approx ear level. The nasty hand-clap reverberation then dissapeared and I don't seem to have any noticable side effects from doing this either. See the pics of my ht room on my website.

HTH

Gary.