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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
k_rose OP
32 posts
 
Last night I tryed a test cd on 50hz on repeat and walk around the room, if this makes sense the sine wave was more noticable standing up than sitting down, clearer at the front and back, Sorry Kijanki, I have been missing the piont of what I have been doing for a while know,I will admit Iam struggle reading all the tecnical stuff with regards to the room hz and so forth, I like the old days when it did'nt matter when I was in my early teens and just love to listern to music!I like the idea of using my latex bed though, I will wait to Sunday when the other half is out and I will give it ago!who knows
kijanki's avatar
kijanki
4,433 posts
 
K_rose -

343/5.25/2=32.66Hz where 343m/s is the speed of sound, 5.25m is the distance between your walls, 2 is because you need two times distance to amplify (from speaker to back wall + back to front wall + front wall to speaker = 2x distance between walls). Exact multiples of 32.66Hz will be multiplied as well since their wavelength is an even fraction.

Nulling is pretty much the same with odd divisions.
magfan
1,583 posts
 
Kijanki, you are computing for 2 wall reflection....good start, and the most important.
How about 3 and 4 wall?
kijanki's avatar
kijanki
4,433 posts
 
Magfan - it's getting too complicated for me. I saw 3d graphs of the room and it shows kind of "domes" instead of waves (combined effect of all walls). People with better math skills can understand it probably further.
magfan
1,583 posts
 
Yeah, that's why I gave up on meters / analysis / test disks and just listen.
You can do about 3/4 of what a consultant can do, for a fraction of the money with only investing time and patients.
Next thing, we'll be talking about RT60 and other phenom.

A good example, kind of OT, is my TV. Yep, I could spend the Big Bucks on an ISF guy to come out and Calibrate, but I can get maybe 3/4 the benefit with the use of a DVE disk (digital Video Essentials)
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