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Last night I spent some time with observing my ULF and I conclude that I am not exactly know what I deal with. Do not get me wrong: the ULF forks fine, sounds fine and the playback is perfectly operational and listenable; it does sound very good right along with ULF integrated. I have no problem to leave it in the very same state as it is now as in my view it is perfectly acceptable result.

However, this fine ULF result is not what I would like to have ULTIMATELY. Ultimately I would like to have much more output at 10-15Hz region but to have nothing extra at 30Hz. I feel that my midbass horn produce very right sound at it very low end. The way how the midbass horn’ lowest notes are dissipating in thin air is fantastic, conforms to the best of my dreams.  They might use more “room” and more “weight” but this sense of “space” and “weight” I feel need to be a bit less generic then what I get. The ULF produces very good room/weight/space trick but it is a bit the same trick type for all music. If to think about then the playback has some kind of coloration at ULF level. Still, shutting down the Melquiades amplifiers and run just ULF channels it is clearly visible that there is no tone coming out of ULF, there is no “sound” out of them that has any tonal characteristics.

As I said, I do not know where this differences minimizing common denominator of ULF coming from. It might be from amplification, might be from the design of my woofer towers, it might me from the exercise level of my ULF output or from other things. It “feels” like my ULF need to be “softer” or to have more “good honk”. I do not know how to do it at this point. Ironically the moving the woofer towers do change the way how the sound. Believe me or not  but the move them for 5-6 inches do change the roundness of the ULF – if to know what to listen then it is auditable. However, this roundness looks like not what I looking. I am looking for a right balance between the speed bump and the stiffness of suspension. I would know what kind feeling I would like to get from that car passing the speed bump but I do not know what kind mechanism I can regulate in order to get this feeling.

My sentiment is that I might need to start from beginning and search for a new crossover point only now with the woofers towers to be positioned where they are now – right next to Macondo in time-aligned position as they use ot be in my old listening room. I keep driving my ULF less and less and not I am at 25dB up compare to what I was at my first day of the woofer towers in the new position. I do have more proper bass weight but I am not getting enough my ULF stimulation at sub-auditable region. I think to have it done properly I would mend two ULF channels – one for infra bass region that is still auditable in midbass and one for 8-15Hz region that has no impact to sounds but rather impact the “miracle” properly of  the room. Sure I will not have two ULF channels but I might experiment with transition sloe of my low filter at my current ULF in order to put one ass on two chairs.

So, the idea is to have more ULF in sun 15Hz region, much more, let say 15dB-20dB more then what I have now. Then to arrive to 25-30 Hz at the same level as I have now, perhaps even 1-2dB more shallow. Do not have any tonal or dymick colorations or any “events” as my midbass are decayed.  That all might be implemented by use of very sharp filter of let say 4-6 order and sliding my ULF down to frequency range at the transition slope. If I put let say 4th order at 10Hz then I might get somewhere but it would give me -48dB at the bottom of midbass horn. To the midbass to “see” my ULF I would need to push a LOT of gains and power into ULF – I just do not have this power in my ULF amplification. Even if I did then I might get just right ULF-LF-midbass balance in my room but it would not say anything about the “character” of bass sound I will get. With pumping 500W-700W into my woofer towers at 10Hz I will be dealing with very different driver reaction and I will be bounded to very limited amplification capacity – in a way will become a slave of it. Interesting the in my current seeming, even while my ULF reproduce sound that I characterize as “colored” the drivers in my woofer towers are practically motionless…

Anyhow, I think I need to rethink that whole thing. I am in a good shape to go for something offensive or as I call objectionable (in my language it means “full of loaded objectives”). What I have is good and it gives me time and room for maneuver for something what would be better than good, let see what it will bring me, at this point I am not sure that know what I deal with.

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