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Well...there are ways to use VSTs on linux like LinVST and Carla. Not sure if anyone has done it with PKHarmonic but it might be worth a try.

How good or bad is the very cheap rtl-sdr option in comparison? https://www.rtl-sdr.com/tag/emi/

It's been a while since I looked, but I think I went through most of the Cotswold and Tectonic datasheets. Some of them have 3rd party measurements too, like the tiny Tectonic: https://www.erinsaudiocorner.com/driveunits/tectonic-elements-tebm35c10-4-miniature-bmr-driver/ Line arrays were...

@Jazzman53 details another approach to electrostatic segmentation at https://jazzman-esl-page.blogspot.com/ - approximating a narrow line source at high frequencies and widening the line as the frequency drops. In that implementation it then crosses over to a cone for the bass, but in principle...

Make a bike box look like it might contain a TV, reduce shipping damage by 70-80% https://www.businessinsider.com/dutch-bike-company-tvs-on-boxes-2016-9

Just curious - is there a way to measure IBU for homebrew without a lab, or is it calculated?

I assume it's ethernet over powerline - to the owner they emit 'signal' onto the powerline, but to nearby radio amateurs they can be quite an intrusive noise source. I suppose it could be something like X10 for home automation though. An inline mains filter to the Loxjie might help, but...

In small portable devices with limited power supply rails the extra voltage swing can help power output into high impedance headphones. It's a pretty small niche use case though.

You shouldn't be getting dropouts with any of them. I'd be looking at the computer as the problem.

https://www.audiosciencereview.com/forum/index.php?threads/budget-standalone-toslink-dsp-toslink-with-camilladsp-set-up-instructions-for-newbies.30830/ Since it's essentially camilladsp on linux with a USB device for the input and output it shouldn't be too hard to apply to other boards, or...

Unfortunately:

If it's not inherent it's tricky enough to solve that nobody has brought one to market yet. From the measurements I've seen, the ones that are large enough to have half-way acceptable bass get messy at the high end, and the ones that do reasonably at the high end can't go much deeper than mid...

It has come up before, probably in one of those. They have a wider dispersion than a similarly sized pistonic driver at high frequencies, but it is still somewhat variable with peaks and troughs in off axis response moving around as the frequency changes. These may be narrow enough not to matter...

It's never good when manufacturers make a significant change to a product without changing its model name/number, but at least they're answering the question for those who have worked out that it might need asking.

This subject comes around again every so often. These should cover it: https://www.audiosciencereview.com/forum/index.php?threads/single-full-range-drivers.12939/...

Does https://github.com/HEnquist/camilladsp#loudness count? Some more background in https://github.com/HEnquist/camilladsp/issues/73 Any reason not to include PulseEffects / EasyEffects as mentioned earlier, or did it just get lost in between the full Pi OS options and the CamillaDSP bits...

And Sennheiser are unusually good at offering spare parts, although I never found them all at the same stockist.

The chips each 'better' at different things, but for choosing an end product that's the wrong question anyway. The important part is how the designer/manufacturer has used them, so look at the end result not the bits that went into making it.

I'm not clear where you're drawing the line between a convolver engine and something that happens to include or use one. This probably affects the linux side more as there is a tendency to split functionality down into smaller units rather than bundle everything into a monolithic application...

Unless you're after the ones built into players like volumio or moode, https://github.com/Wang-Yue/CamillaDSP-Monitor is the only one I've seen. I haven't tried it. Most of the other tools on github are CLI, like https://github.com/Ebert-Hanke/autoeq2camilladsp