There's a lot more bass in a 6.5" driver than most of you think

@jmpsmash

apologies if you have mentioned it. back to your original post. I wonder how big is your room?

The total acoustic space is about 12.5’ x 30’, divided lengthwise into a living room and a second kitchen/dining area.

6.5" may be good enough for a medium room, but might be a bit lacking if there isn’t enough travel to move enough air to energize a large room.

So, again, the point of the post is not that everyone will be satisfied with a small woofer, but to help buyers understand that even relatively small speakers can put out quite a bit, and that room acoustics matter a great deal. For my modest apartment, with the couch 9’ or so from the speakers this is plenty of high quality bass.  Which brings me to another point:

Good room treatment can make speakers sound BIGGER. Going with larger speakers in a bad room may in fact be a bad idiea.

@erik_squires

"

To appreciate what constitutes a good bass, one needs to experience a distributed subs system like the Swarm

Not at all universally agreed to.
https://www.soundandvision.com/content/are-you-putting-subwoofers-behind-viewer "

The author has no idea how distributed bass works. Both Geddes (PhD thesis on bass) and Welti (Floyd Toole’s Harman lab) found in their research that key to distributed bass is asymmetric placement. Geddes believes three sources is enough: one in the corner, two others haphazardly against other walls. Duke LeJeune, Geddes’s coworker and constructor of the Swarm, adds the fourth source. There is no point adding more sources. Phase switching is not really part of the concept. Digital corrections of the whole system can be applied, but already the haphazard placement does most of the job. Digital corrections using counterwaves, such as those used in Kii3 or D&D, don’t really work below 50-60 Hertz. To battle complex phenomena like room modes, randomness is the most optimal way. Here, one can see easily, what problem room modes can be computationally:
hunecke.de | Room Eigenmodes Calculator

One more interesting concept is dipole bass, proposed by Siegfried Linkwitz in his  LX521. The subs are v-frame dipoles and the side wall modes are minimized by cancellations. The bass is incredibly clear and tight.
Finally, one can put the single sub next to his listening position to get at least one good spot with it.

In your post regarding Linkwitz you prove my point. The idea that only swarms can produce great bass is what I object to.

Hello pirad,

    I was so impressed with your knowledge and posts on this thread, that I looked at your profile and read many of your previous posts on a wide variety of other threads and subjects. They were equally impressive, demonstrating an equally substantial knowledge of the science of the subjects combined with an obvious good measure of practical experience on the wide variety of subjects.  
    I'm fairly certain my very high opinion of your posts as very high quality are influenced by the fact that I agree with the vast majority of your well worded opinions. I was just curious whether you're associated with an audio industry company or just an interested consumer hobbyist?

Thanks,
  Tim