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How to fix a lack of bass Null

Hi
Have tryed tying all sorts of different key words on Audiogon, until to day did'nt relised, that a room could be affected by a lack of bass, from what I read, this call a null, I have tryed different equipment over the last couple of years as I always thought that my equiment was bass shy. I found this programe on Audiogon called Hunecke speaker calulator, not shore if I am using it properly,It shows a big dip @31.5 - 63 hz and could explain a lake of base at my seating position, I cant seem to be able to move the speaker with the cursor, this is suppose to change speaker location and tell you flatess spot I think if I am reading it right? Do I buy a meter and setup disk? what treaments is there for this problem (Nulls), if this is the case?I google with know real answer's!
Room 5.250L x 4.00W x 2.4H
k_rose
shadorne's avatar
shadorne
7,491 posts
 
Rocadanny,

What you probably did was to attenuate the tangential room mode. The nasty thing about tangential nulls is they line up along the center line of a room - so you get a null right down the middle of the length of the room no matter where you sit. Treating corners helps with this too.
shadorne's avatar
shadorne
7,491 posts
 
I'd suggest a fire place with logs stacked all around it on the rear wall of the master bedroom with bookshelves around it. The other thing is to consider a large extra thick latex mattress king size bed - avoid spring mattresses as they do little in the bass - a thick Latex mattress will be an extremely effective absorber placed at one end of the room or towards one of the four corners. The other trick is soft padded furniture - love seat with big cushions. You will be suprised - you can do a lot without causing a divorce (acoustic panels in a bedroom would certainly do that...)
newbee
4,822 posts
 
Phew! Thank god you said that "acoustic panels in a bedromm would certainly do that...". At first I thought you were recommending that the mattress be mounted on the wall or in the corners! :-) BTW, what frequency spectrum would be attenuated by the mattress you recommend?
shadorne's avatar
shadorne
7,491 posts
 
BTW, what frequency spectrum would be attenuated by the mattress you recommend?

Absorption is mostly about size and thickness. A mattress of this type will usually be several layers of different density latex and therefore you should get good broadband absorption. Unfortunately, a coil mattress and box-spring has much of the space filled with air - so if you can find something to stuff the box with then you'll get an amazing low end response.
shadorne's avatar
shadorne
7,491 posts
 
At first I thought you were recommending that the mattress be mounted on the wall or in the corners!

Newbee. Where you mount your mastress is none of my business - just don't get caught doing it!
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