Originally Posted by Claybe
Well I am in a temporary space for my theater as my basement flooded and I am waiting to see about fixing it. So I will wait until I have my final theater to implement any room treatments.
You asked what a "good measurement" looks like. Of course there is no one answer. But here are some characteristics that you might find in a good-sounding room:
- A reasonably-flat response curve from 20Hz up to 15-20Khz. By reasonably-flat, I mean variations no more than +/- 5dB.
- A general downward slope from left to right, with the left side of the response curve (low end) 5-10dB higher than the far right side (high frequencies).
- Bass resonance under control as per the guidelines contained in the REW guide.
- Room reflections under control, also as per the guide.
Looking at the response curve you posted, several significant issues stand out:
- A steep roll-off below 40Hz
- Severe choppiness in the 80-200Hz range (a 30dB drop)
- A significant roll-off in the high end starting at 7Khz.
What to do to fix response issues?
- Do nothing until you are in your permanent room.
- Explore various speaker locations to smooth out the frequency response.
- Check the response of the sub and the main speakers to understand whether the low and high frequency roll-offs are because of speaker design, or room conditions.
- Consider an AVR with automated room correction.
- Consider carefully selected and placed room treatments.