Originally Posted by kiwi2
Now I have found from my own experiences with setting up different rooms, is that a large peak somewhere in the bass response (say 6 to 12dB higher) makes you think you have lots of bass. It doesn't matter if there is a monstrous null on either side of that peak because you will hear and feel *a* bass note.
I have made some measurements this morning (at 1/24 octave) to help illustrate the point. I had to turn off one sub and also reverse the remaining sub's phase just to deliberately make it look bad...
Now this could actually be typical for a lot of people - especially if they have used the sub crawl method to locate the sub. That 7dB hot 50hz peak will certainly call attention to itself and give the impression of a bass response. Unfortunately 90 to 60hz is rather low with a -8dB at 70hz and 30hz is the -3dB point. That is what one note boomy bass looks like.
After a while (days, weeks, months) the listener may notice the bass overpowering and smearing and thus distracting from other parts of the music. They may try turning the bass level down to try to remedy the problem.
Doing so has certainly fixed the 50hz +7dB hot problem but it has also now made the 70hz null worse as it is now -12dB and total coverage only extends down to around 45hz. This option though is probably what a lot of people would prefer for music when they don't want a lot of bass. It would be better for them than having a large overpowering peak in the response.
Me, I like to measure and make adjustments until I get a smooth even response free from large peaks and dips...
This way bass isn't overpowering yet at the same time I get to hear all of the octaves so cellos sound like cellos and big kettle drums sound like big kettle drums. The subs don't call attention to themselves and just blend in seamlessly with the speakers as they are all a part of the one system.
I wonder what percentage of people commenting in this thread actually take measurements of their own system for themselves? It would be interesting to compare people's frequency response measurements against the comments they have made. If anybody has any measurements to share, please do.