I have a similar question to Njonker's. I have plotted a graph using the test tones from Stereophile test cd 3. I used a Radio Shack spl from the listening position. My results are much flatter than Njonker's, staying within +-4 db of 80db at 1 kHz, with the exception of a 10 db spike at 6000-8000 kHz. What room characteristic would cause this? how does this compare to others who have tried this? Njonkers, I think you may have started something with your graphs. You have inspired me to get up to speed with my computer skills.
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.
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.