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Site News: 16 Jan 2026
That old bug returned. Sometimes creation of new threat not going to work.  The replies still work. 
I will fix it soon.
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Thread WITH the new posts.

Legends: "Week" - last week posts, "Bold" - entered last 48 hours.
Macondo’s lowest channel. 5606 
A mono LF channel – I do not like it. 5602 
LF Results 5602 
The size maters 5601 
Response Curve 5601 
ULF placement and power 5601 
Wishful thinking and the Maelstrom-21 5601 
I will need a direct radiator under the bottom… 5601 
ULF experience: Drivers & power considerations cont'd 5600 
To experiment during the New England winter 5600 
Pitching pitch 5600 
There are many key points…. 5600 
A first true bass test 5584 
Actually…. 5584 
Best place lost? 5579 
Best location for bass, where art thou? 5579 
What to expect from ULF channel? 5563 
OK, it is something. 5562 
The new ULF scenario experiments. 5555 
Time coherence of ULF - my experience 5555 
Placement of ULF #2 5555 
Why I like the like the location #1 5555 
I need to find another ULF solution. 5547 
Ceiling subs 5546 
The infinite baffle shall be a very good solution. 5546 
This morning I woke up horny 5546 
Dsp 5546 
Parametric filters 5545 
SMS 1, Act II 5545 
I think I have found the problem with my ULF 5545 
SMS distortion issue? 5545 
At 30Hz of high order there are not truly tone” of “sound” 5545 
DCX output stage mods 5545 
Very small minority of the folks… 5545 
Exactly zero I suspect. . . 5545 
DSP vs. Music vs. HT 5545 
10" array; how low? & SMS-1 distortion 5545 
Interesting: 10” vs. 15” 5545 
Multiples of the Same Rising Response Curve? 5545 
The crisis of perception. 5544 
Dynamic range of ULF, tsunami and something else. 5543 
The Circle Unbroken 5543 
I wonder… is it PP2000? 5527 
The ULF and PurePower 2000 5518 
ULF Channel and LP playback. 5461 
Are original Aura Sound 1808 sound ULF solution for sealed enclosure? 5459 
I do not have an opinion yet. 5459 
Imponderabilis Neurosis 5459 
Bass non-pathologic hallucination… 5459 
A new paradigm for ULF? 5459 
…a number of logical flaws… 5459 
MAD HATTER 5458 
Thinking about my lower bass 5438 
Has Schrödinger's cat moved in unnoticed? 5438 
Wrong. 5438 
Groove Echo 5438 
Wrong? Actually, our actual positions differ very little, surprisingly enough. 5437 
Listening help with ULF stimulator 5437 
The ULF debate: time-alignment 5435 
Trying to address the dilemma with lowest bass. 5434 
Rotary woofer for ULF? 5434 
I do not need a Rotary woofer, I need to be less Moron. 5434 
*** 5434 
Congrats 5433 
Getting some maturity with ULF 5432 
About ULF attenuation. 5431 
How is it implemented? 5431 
My implementation of ULF channel. 5431 
Further thoughts about ULF channel. 5430 
ULF 5430 
I would agree but… 5430 
The problem that that I see with my ULF 5430 
Loudspeaker Proximity Coupling in Midbass & ULF 5430 
Great rotary idea! 5430 
Brilliant analyses! 5430 
Going down with bass 5428 
Under FS 5428 
Ideal ULF/Midbass integration 5428 
My super smart room! 5428 
Erratum ( or errata if you insist) 5428 
The issue is a complex one and should not be addressed generically ... 5428 
Cost benefit analysis of midbass horns v/s compromised ULF 5428 
There is no cost-benefit analysis for this thing. 5428 
I will experiment. 5428 
Sometimes experiment is not just experiment. 5428 
One Bass Horn or Two – for Oxric 5427 
My ways to mimic Reality. 5427 
Patent GB 394,325. "Transmitting, recording, and reproducing music..." 5427 
"the purpose of playing, whose end both at the first and now..." 5427 
No manuals for those things…. 5427 
More about Rotary ULF idea. 5422 
Phoenix Gold Cyclone 5422 
Passing the waves…. as usual.... 5418 
Drive ULF Amp from Midbass Amp Output 5417 
There is “something”… 5417 
I do not know what I deal with. 5416 
I want my ULF amp back. 5405 
ULF emergency: Big & nasty solutions 5404 
No-amplification time 5404 
Listening audio without ULF. 5403 
Ok, I got the bass amp… 5403 
How much power do I need for my ULF. 5393 
A True ULF - what an amassing tool!!! 5391 
Put Marchand Crossover into the game. 5387 
I begin to like my active crossover. 5375 
Line-level passive vs. active ULF filter 5373 
Hm, there is no way to escape the 4th order. 5373 
Phase butterfly effect. 5372 
Back to DSP? 5372 
What I am trying to accomplish. 5372 
The art of ULF volume adjustment. 5371 
Sitting on a fence with ULF 5369 
The overly-swallowable bass. 5362 
To deLamminate my ULF channel. 5361 
What a beautiful result!!! 5360 
Pipe Organ with 128' register in Augsburg, Germany 5354 
An absolute must for ULF channel. 5337 
The compartmentalized bass 5214 
Paralleled SET bass 5210 
A new concept of ULF channel. 5202 
Infinite baffle 5202 
A 4th order bandpass vibrator? 5202 
ULF idea, possibly stupid. 5201 
IB vs Horn 5201 
A Distributed Infinite Baffle? 5200 
"Tuning" the "IB" 5200 
Flip 90 degrees 5200 
Little bump and the elephant solutions 5200 
How to do THAT? 5199 
ULF from coffee table 5199 
The through-hole tapped horn. 5199 
25 hz at 6db? 5199 
ULF from the SledgeHammer 5199 
Why not really use the basement 5199 
Never say never 5199 
How good ULF needs to be? 5188 
How good the user needs to be? 5188 
Maybe . . . 5188 
I think there is little evidence of marketing bias in the papers. Call me naive if you wish. 5188 
Narrow [Band] Tuning (DSP?) 5188 
ULF-only Sound 5148 
An easy ULF solution for someone. 5140 
Red Grills 5140 
It is exactly what I would like to avoid. 5139 
So I took your advice 5081 
Ok, let me know how it goes. 5081 
The ULF amp Itch. 5067 
Here is an update for the old thread.... 2688 
Good highs 2688 
Marchand 1745 
What truly are you tryin to accomplish? 1745 
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