09-26-2018 Post does not mapped to Knowledge Tree Romy the Cat Boston, MA Posts 10,155 Joined on 05-28-2004 Post #: 41 Post ID: 25122 Reply to: 25121 Eventualy! OK, I have found the problem I had with my digital and analog crossovers, now everything is consistent. It turn out that my contractor why built for me the IB manifold confused the polarity of right and left channels. I was not able to use the phase tester with analog crossover as the filtration too deep and I have no access to the drivers up close.  With digital crossover I was able to bypass the filter and test the phase and everything was in phase. With analog crossover the R and L IB channels were out of phase and the reason why the digital crossover sounded so well was because my digital crossover was set to invert polarity of channel B. I discovered the problem when I made the first time sweep for both channels.    So, the digital filter is gone. I end up with 35Hz Bessel and below is the response for both channels individually. I am positively surprised, (VERY SURPRISED!!!) with final sonic result I got and with relatively low amounts of efforts it took. I will work with small bells and whistles of response and tonal/dynamic (tubes, cables etc…) aspect of sound but the basics is there… "I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

09-26-2018 Post does not mapped to Knowledge Tree anthony Posts 338 Joined on 08-18-2014 Post #: 42 Post ID: 25123 Reply to: 25122 Awesome You said it sounded like a phase problem and it was.  Couldn't have been easier to fix either.

05-13-2019 Post does not mapped to Knowledge Tree Romy the Cat Boston, MA Posts 10,155 Joined on 05-28-2004 Post #: 43 Post ID: 25417 Reply to: 25015 I might have very interesting result... This weekend a local audio guy was visited me and we had some listening and some talks about my ne bass. I kind of make him to talk about is as I was listening with him and noted that it was a very not just nice but better then I remember if should be. I think as the year progresses and the temperate out jumped over 65 the driver’s suspension get softer and the resonant frequency dropped. The guy was listening my old playback in city and my last listening room. This is the third room that he hears and I naturally asked him about the bas in my last 3 listening rooms. He felt that the bass in my current listening room is different. As much as I pressed him to identify the different he was not able to come up with a description that it is “hard and punch but soft and lash at the same time”. Generally he is correct and I need to say that this infinite baffle is ended a VERY different animal and we generally not accustomed to it in audio, primary because infinite baffle is not a commercially product by definition.    The infinite baffle for sure has that stunning softness that I very much appreciate that still in my view nowhere how soft life bass. How to get more softness out of bass? I think I need to drive my infinite baffle with crap SS amplification. Purely hypothetically, if I have 100-150W DSET bass amplification but properly done then driving my infinite baffle I might have very interesting result. "I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

05-23-2019 Post does not mapped to Knowledge Tree Paul S San Diego, California, USA Posts 2,656 Joined on 10-12-2006 Post #: 44 Post ID: 25441 Reply to: 25417 The Organic Bass vs. ULF Drivers I seem to remember that we've covered somewhere the sonic benefits of SET at lower frequencies, but I guess I never really thought of ULF as "bass", per se.  If someone ever comes up with an SET that can be an effective part of an AuraSound circuit, I absolutely want to hear it. Meanwhile, it seems just as likely that a Hypex or similar might do the trick, and - electrically speaking, anyway -  the Hypex seems more likely than the SET for ULF drivers I am aware of.  To show how addled I am on this subject, I was actually thinking yesterday about servo circuits; nothing practical, just thinking about cutting LP's and the "implications" of this for big driver motors. Paul S