Tuning speaker / room response?


I finally did an experiment this afternoon to check out my speaker and room response. The graph below shows the results:

I got this using the Stereophile Test CD 2 tracks 15 through 18 using my system. The first one provides pink noise, the others give warble tones at the various center frequencies shown in the chart.

A Radio Shack SPL meter, in fast mode, C weighted, was used to to capture SPL levels. The meter was in the 80dB range. As C weighting rolls of above 10kHz, I did not show the rest of the spectrum.

Now this does not look all that flat to me, but I have never done this before. Can anyone give me an opinion on how good or bad this looks?

Also, it looks to me like a little room tuning might help. Anyone have any suggestions as to where to start with this?

Niels.
njonker

Showing 1 response by nilthepill

Niels,

The correction for the Radioshake meter are as follows. Replot the response by ADDING the correction values to measure values and then seee where you stand.
Freq correction
20 6.2
25 4.4
31.5 3
40 2
50 1.3
63 0.8
80 0.5
100 0.3
125 0.2
160 0.1
200 0
250 0
315 0
400 0
500 0
630 0
800 0
1000 0
1250 0
1600 0.1
2000 0.2
2500 0.3
3150 0.5
4000 0.8
5000 1.3
6300 2
8000 3
10000 4.4
12500 6.2
16000 8.5
20000 11.2