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Bass in my room isn't good? Help

Hi,
I just measured the bass in my room by using the Radio Shack'sound Level Meter (analog)and Stereophile Test 1 (track 20 to 31). All I got for the bass requencies aren't looking smooth, and here is the result
1Kz = 78.5db
200Hz= 78
160Hz= 71.5
125Hz= 78.5
100Hz= 76
80Hz = 76
63Hz = 71
50Hz = 71
40Hz = 79
31.5Hz= 75
By looking at the result, I can see the problem happens at 160,63, and 50Hz. However, when I bought the Buster bass trap, they told me that thier bass trap can control down to 40Hz. My JMlab mini monitor can goes down to 57Hz, so I have to use a JMlab sub which can goes down to 30Hz, and my Classe ssp25 has the cross over requency of 80Hz. Does anybody have any solutions for this problem? I have only 2 Echo bass trap (6'tall), do I need more?
Thank you very much
DT
Ps: I set the meter C weighting, Slow, Range 80. Vollum on my pre-amp was -20db, and the meter was on my seat as same height of my ear when I sit.
worldcup86

Showing 1 response by worldcup86

worldcup86 OP
68 posts
 
Hi,
Thanks for your responds. Here are more of information.
My stereo system is on second floor and don't have any spikes yet. Room size L=14.8'X W=12'X H=8'. The Jmlab monitor Electra 905 goes down 57Hz with -/+3db. The Classe SSP25 has only one crossover frequency 80db, and I set the sub at 85db. The vollum on the sub is about 1/4 of the max.
I set the speakers 5'from the wall behind it, and 3'from the side wall for the last measurement. I changed the speakers 3' from the wall behind it, 2.5' from the side wall this morning.
1k=79; 200=76; 160=74; 125=78.5; 100=75; 80=78.5; 63=69.5
50=67.5; 40=78; 31.5=75
Look like everything are almost the same except for 160Hz improving a bit and 63, and 50Hz get worst.
One more question, if I measure from 30Hz to 20Khz, what should I expect the grap look like? How many db difference between the peak to valley is acceptable?
Thank you very much
DT
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