OK...Added 2 HSU ULS-15Mk2 subwoofers To My System

Big Hsu fan here. 😉

I've got the ULS-15 MKII and it's a musical sub, so I'm not surprised the OP is finding more detail.  It's gotta have the best bang for buck in a 15 inch, since they upgraded it.  

Congrats on the addition!

Hello scm,

    I also want to officially welcome you to the 3-4 Sub DBA Club, "where near state of the art bass performance becomes a routine reality in any room and with any pair of main speakers you prefer."
    I didn't consider myself a bass-head either until I began using a 4-sub Audio Kinesis Debra DBA system in my system and room. Now I consider myself more of a bass connoisseur because I'm now able to hear the details of pitch, texture, initial impact, changes in volume and natural decays of all of the separate bass instruments in the soundstage clearly on all music tracks. It really adds to the realism and enjoyment of all types of music for me because I can identify and clearly follow any instrument's bass line I prefer to.  I'm not exaggerating when I state the 4-sub DBA is the best single upgrade I've ever experienced in any of my systems over the past 50 years.  
    I still believe we can describe to others how remarkably well this 3-4 sub DBA concept actually works in practice until we're blue and convince very few. But ironically, we all know about a 10 minute personal audition would convince virtually anyone.  Plus it works in any room and with any main speakers, even notoriously hard to integrate fast speakers like planar-dynamic and electrostatic types.
    I understand they don't know what they don't know, but I thought more members would be adventurous and daring enough to at least give it a try. Oh well, I guess a lack of adventure and ambition results in a lack of very good bass resolution and a lack of daring results in the apparent lack of caring about the absence of high quality bass performance.

Enjoy,
 Tim

I understand they don't know what they don't know, but I thought more members would be adventurous and daring enough to at least give it a try. Oh well, I guess a lack of adventure and ambition results in a lack of very good bass resolution and a lack of daring results in the apparent lack of caring about the absence of high quality bass performance.

As I'm sure you know, this was all new to me a year ago. Its almost exactly one year now, maybe a little more, I first learned about DBA right here from you and Duke.

Back then I was just like everyone else, maybe a little better understanding of room modes and acoustics but like everyone else stuck in the one sub rut. Only real difference being I had tried hard enough to know one sub cannot work, not the way we want it to anyway, and given up. All the evidence seemed to say its impossible. By that I mean not only that one sub cannot work, but that there was no solution. I was convinced and had resigned myself to this. 

So there was probably not a tougher customer than me. 

And yet, when Duke congratulated me on having the faith, or however he put it, to do this, as nice as he is I had to set him straight. It wasn't a matter of faith. There was no faith- or daring, nor risk, or doubt. Because the situation- the physics and the psychoacoustics- had been so beautifully explained by guys like you and Duke, and Geddes, et al. 

You guys put it all right here on this site. Sitting right there for the taking. And take I did! Read it all. Then went and built it. Because boy did I have the desire. Or as you put it, care about the absence of high quality bass performance. It had been in my estimation the weakest aspect of an otherwise compelling and very satisfying system. 

Which in one fell swoop went from weakest link to arguably the strongest. In a system that over the same year improved immeasurably across the board. That is huge. Transformative. All thanks to you guys. Well, okay, and a little initiative on my part. But I couldn't have done it without you.