Furysub, Apache H15, or Jbell 2' cube

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You don't need to press Ctrl with Lightshoot just printscr key,plus it have some more functions that snip don't have, is very handy. I like it and recommended to Booger and he's a happy camper 🙂, there are many variations of the theme, is matter of personal taste.

How do you like your eggs kind of thing 🤪
 
Just had a look at Lightshot, it may be somewhat better than snip & sketch tool in Windows as it seems to be slightly more responsive and easier if you want to scribble on the picture, both are slower than alt+print screen by far.
If there was a way to compile several images into a single file without using another program like mspaint then it would be much better, the biggest difference between Lighshot and snip & sketch seems to be: For Lighshot you have to press ctrl+c before you have the picture in clipboard vs the snip & sketch you have it immediately in clipboard after marking the area.

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VS

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From this simulation we can see 3dB lost in the low range, so we Can't say this is an improvement, it might be a trade-off, you loose SPL at lower frequency to reduce the amplitude of the spikes in the upper range.

It's also important to check if the simulated numbers can be translated into a real box dimensions / geometry and we can do that with FreeCAD models.
 
And paste screenshots directly without using your cell, you save more hassle.
It's quick and fast you just

press the printscr key
Select the area of hornresp with the mouse
Select copy from the side menu
Select your DIY forum post
Press CTRL-V and Voila!!
Instant eye candy!

Too many steps.
As long as your cursor is in the window you want to copy, just use the:

Alt + PrtScn keys.
Paste with right click mouse or Ctrl + V keys.

I can't type, so I use what is most efficient (BP's 4 Life).
 
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From this simulation we can see 3dB lost in the low range, so we Can't say this is an improvement, it might be a trade-off, you loose SPL at lower frequency to reduce the amplitude of the spikes in the upper range.

It's also important to check if the simulated numbers can be translated into a real box dimensions / geometry and we can do that with FreeCAD models.
Standard ODMLtl using Martin Kings 2 decade old (?) tables. ‘Improvement’ is not ‘SPL’, it’s a flat/damped response to 5•Fb in reality. (Not including the 0.75 Fb drop from the mass loaded last fold?) undamp it and/or tune it higher if you want ‘more SPL’ ...

swap the driver, Add some filter/dsp? B&c 18 ds 115-4 bolts right up in 5 minutes. Dayton Umax18 rings(heavy cone, lower Qes)


@ 18 ds 125-4, Shorten it to 104.72,100,95.28 cm and ~900,900,450 cm2 @ ~21.6 hz(I use this length for dayton rss265ho4 in an appropriately skinnier 300,300,150 cm2)

69.81, 66.66, 65.53cm … ~32 hz And so on
 

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example 200cm (43.2 hz). Is split @ 200x (0.349 or pi/9) as 69.31cm, 66.66cm and 63.53cm … To exit (200 total). once damped, and or corner, loaded this line’s up perfectly as described, formerly in Martin Kings tables for transmission, line, offset and reduction ratios. Apparently It’s a combo of end correction and line split at acoustical center from the closed end of any pipe as this works perfectly for positioning, the hot/ cold/damped source in a thermal acoustic engine using glass test tubes or similar too(an exciting experiment to do too!!) .

66.66 cm is 129.6 (hz ( 3•Fb harmonic void is now filled)

43.2(x0.75) is ~32 hz , as a result of the 50 % cm2 reduction. Of the last of 3 folds. The CSA is far from the air speed of a ‘typical’ bass reflex port, or this TL is a hybrid of both…. I dunno, but I like these as well as the higher order version if the TS parameters will allow
 
Higher order qw pipe version is just moving the exit to the location of that 3•Fb harmonic in a parallel pipe that incorporates both sides of the driver, fired from each end, or or moved away from it, to smooth out any response ripple (if/as needed) at the same location (3Fb resonance over excited, or driver happier at that affectingly lower pressure zone from the closed end ??? )

funstuff!!