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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. 5613 
A mono LF channel – I do not like it. 5609 
LF Results 5609 
The size maters 5608 
Response Curve 5608 
ULF placement and power 5608 
Wishful thinking and the Maelstrom-21 5608 
I will need a direct radiator under the bottom… 5608 
ULF experience: Drivers & power considerations cont'd 5607 
To experiment during the New England winter 5607 
Pitching pitch 5607 
There are many key points…. 5607 
A first true bass test 5591 
Actually…. 5591 
Best place lost? 5586 
Best location for bass, where art thou? 5586 
What to expect from ULF channel? 5570 
OK, it is something. 5569 
The new ULF scenario experiments. 5562 
Time coherence of ULF - my experience 5562 
Placement of ULF #2 5562 
Why I like the like the location #1 5562 
I need to find another ULF solution. 5554 
Ceiling subs 5553 
The infinite baffle shall be a very good solution. 5553 
This morning I woke up horny 5553 
Dsp 5553 
Parametric filters 5552 
SMS 1, Act II 5552 
I think I have found the problem with my ULF 5552 
SMS distortion issue? 5552 
At 30Hz of high order there are not truly tone” of “sound” 5552 
DCX output stage mods 5552 
Very small minority of the folks… 5552 
Exactly zero I suspect. . . 5552 
DSP vs. Music vs. HT 5552 
10" array; how low? & SMS-1 distortion 5552 
Interesting: 10” vs. 15” 5552 
Multiples of the Same Rising Response Curve? 5552 
The crisis of perception. 5551 
Dynamic range of ULF, tsunami and something else. 5550 
The Circle Unbroken 5550 
I wonder… is it PP2000? 5534 
The ULF and PurePower 2000 5525 
ULF Channel and LP playback. 5468 
Are original Aura Sound 1808 sound ULF solution for sealed enclosure? 5466 
I do not have an opinion yet. 5466 
Imponderabilis Neurosis 5466 
Bass non-pathologic hallucination… 5466 
A new paradigm for ULF? 5466 
…a number of logical flaws… 5466 
MAD HATTER 5465 
Thinking about my lower bass 5445 
Has Schrödinger's cat moved in unnoticed? 5445 
Wrong. 5445 
Groove Echo 5445 
Wrong? Actually, our actual positions differ very little, surprisingly enough. 5444 
Listening help with ULF stimulator 5444 
The ULF debate: time-alignment 5442 
Trying to address the dilemma with lowest bass. 5441 
Rotary woofer for ULF? 5441 
I do not need a Rotary woofer, I need to be less Moron. 5441 
*** 5441 
Congrats 5440 
Getting some maturity with ULF 5439 
About ULF attenuation. 5438 
How is it implemented? 5438 
My implementation of ULF channel. 5438 
Further thoughts about ULF channel. 5437 
ULF 5437 
I would agree but… 5437 
The problem that that I see with my ULF 5437 
Loudspeaker Proximity Coupling in Midbass & ULF 5437 
Great rotary idea! 5437 
Brilliant analyses! 5437 
Going down with bass 5435 
Under FS 5435 
Ideal ULF/Midbass integration 5435 
My super smart room! 5435 
Erratum ( or errata if you insist) 5435 
The issue is a complex one and should not be addressed generically ... 5435 
Cost benefit analysis of midbass horns v/s compromised ULF 5435 
There is no cost-benefit analysis for this thing. 5435 
I will experiment. 5435 
Sometimes experiment is not just experiment. 5435 
One Bass Horn or Two – for Oxric 5434 
My ways to mimic Reality. 5434 
Patent GB 394,325. "Transmitting, recording, and reproducing music..." 5434 
"the purpose of playing, whose end both at the first and now..." 5434 
No manuals for those things…. 5434 
More about Rotary ULF idea. 5429 
Phoenix Gold Cyclone 5429 
Passing the waves…. as usual.... 5425 
Drive ULF Amp from Midbass Amp Output 5424 
There is “something”… 5424 
I do not know what I deal with. 5423 
I want my ULF amp back. 5412 
ULF emergency: Big & nasty solutions 5411 
No-amplification time 5411 
Listening audio without ULF. 5410 
Ok, I got the bass amp… 5410 
How much power do I need for my ULF. 5400 
A True ULF - what an amassing tool!!! 5398 
Put Marchand Crossover into the game. 5394 
I begin to like my active crossover. 5382 
Line-level passive vs. active ULF filter 5380 
Hm, there is no way to escape the 4th order. 5380 
Phase butterfly effect. 5379 
Back to DSP? 5379 
What I am trying to accomplish. 5379 
The art of ULF volume adjustment. 5378 
Sitting on a fence with ULF 5376 
The overly-swallowable bass. 5369 
To deLamminate my ULF channel. 5368 
What a beautiful result!!! 5367 
Pipe Organ with 128' register in Augsburg, Germany 5361 
An absolute must for ULF channel. 5344 
The compartmentalized bass 5221 
Paralleled SET bass 5217 
A new concept of ULF channel. 5209 
Infinite baffle 5209 
A 4th order bandpass vibrator? 5209 
ULF idea, possibly stupid. 5208 
IB vs Horn 5208 
A Distributed Infinite Baffle? 5207 
"Tuning" the "IB" 5207 
Flip 90 degrees 5207 
Little bump and the elephant solutions 5207 
How to do THAT? 5206 
ULF from coffee table 5206 
The through-hole tapped horn. 5206 
25 hz at 6db? 5206 
ULF from the SledgeHammer 5206 
Why not really use the basement 5206 
Never say never 5206 
How good ULF needs to be? 5195 
How good the user needs to be? 5195 
Maybe . . . 5195 
I think there is little evidence of marketing bias in the papers. Call me naive if you wish. 5195 
Narrow [Band] Tuning (DSP?) 5195 
ULF-only Sound 5155 
An easy ULF solution for someone. 5147 
Red Grills 5147 
It is exactly what I would like to avoid. 5146 
So I took your advice 5088 
Ok, let me know how it goes. 5088 
The ULF amp Itch. 5074 
Here is an update for the old thread.... 2695 
Good highs 2695 
Marchand 1752 
What truly are you tryin to accomplish? 1752 
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