For who or whom?. Certainly was and is the best solution for you or millercarbon but thta does not means is the best solution for other gentlemans.
Your needs, priorities, room system, MUSIC/sound experiences, ears sensitivity, knowledge levels and many other things are not the same for all of us.
So, there is not that " best solution ". That's what you like it nd that's all.
In the other side the HT needs are different than the specific needs for people like me or the OP that only want to use our room/system to listen MUSIC in two channel equipment where normlly we re looking for the higher quality level we can chieve with the higher room/system resolution.
Quality first and quantity not main target.
Problem is that in a thread you read " subwoofer " and your personal solution is the 4 AK Swarm no matters what.
No one own a perfect system and certainly not yours or mine. Who told you that to listen only MUSIC in a system the best is your solution: who?
Certainly it's not the " best solution ". With passive speaker designs two good quality subs are what we need.
Seems to me that your posts are way HT oriented that goes more in specific to your solution. For just MUSIC your approach is wrong/non-adequated, at least for me.
In your solution you don't care about the quality of the subs but I care a lot of and I'm not only talking of the subs facilities but its overall quality performance levels that's why I choosed Velodyne. Yes for other audiophiles preferences can be different there are several very good subs out there.
Normally no one cares about subs distortion levels and as fact the subs manufacturers just does not disclose in the subs THD specs. That I remember only Velodyne did it but other more expensive subs as the ones by JL udio does not do it. The 0.5% THD in Velodyne is an achievement.
The JL Audio ( I can't remember the model. ) through Stereophile review measured a value around 5%-6% ! !
I'm sure that you don't care about in the same way I do it.
People like me are looking for subs that can't degrade the bass information range that we take out from the main speakers. So we are looking for better mid/high frequency range quality levels along better overall bass frequency range quality levels too. We want it " all ".
Anyway, obviously you are free to post what you want. No problem but I explain my self in the overall subject because does not exist " a good for all solutions " and that AK DBA/Swarm solution is at a very low price point that goes along same quality levels.If we need quality then we have to pay for it.
R.