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https://www.keele-omholt-technologies.com/papers/Keele-2003-10-AES-Preprint-CBT-Paper4.pdf covers Keele's approach to approximating the shading function with banks having 3dB steps that could be done with relatively simple passive arrangements.

Not hearing something you should be able to is another demonstrated form of confirmation bias, and should be accounted for in good test design. You'll see this in the good published studies. It's not so easy with self-administered tests though. I think quick switching being more sensitive (among...

See also the section on the 'Wason effect' (best tried on headphones):

In sighted tests without level matching no doubt. Now try level matched and without peeking.

Regarding beaming, presumably a planar magnetic could be segmented similar to @Jazzman53's electrostatics: https://jazzman-esl-page.blogspot.com/

Presumably they are routing the coax and toslink direct to the DAC chip's spdif input, rather than via the XMOS. That's what Khadas did with the Tone Board. IIRC the XMOS can be used as an spdif receiver, so it seems like a design choice. It could be as simple as deciding to add the PEQ late in...

...or whether he's 'done a Ratner.'

See https://www.audiosciencereview.com/forum/index.php?threads/hiss-list-s-r.18050/

More like the Emperor's new clothes.

I suspect the Amp2 hat is no worse than the amps in some well regarded active speakers.

One mosfet makes a good marketing story, and a section of the market demand it (see Nelson Pass's presentation of the analog crossover for the LXmini at AmpCamp explaining demand for it from the far east for example.) Better performance and/or lower cost for the extra components. Analog design...

Or discreet transistors which may perform better than a mux. I suspect it's about having a good marketing story rather than performance though.

Linsley Hood presented a similar arrangement for input switching with jfets iin 'Audio Electronics' (pages 136-138, fig 3.14) suggesting that if the resistors around it (input, feedback) are high relative to the on resistance of the switch then the effect of the change in on resistance is low -...

The Wago version, somewhat cheaper: https://uk.farnell.com/wago/215-212/connector-4mm-plug-red-20a-cable/dp/4244605

https://www.audiosciencereview.com/forum/index.php?threads/aiyima-a07-tpa3255-amplifier-measurements-and-review-lm4562-and-opa2134-option.19155/post-639061 @pma did a lot of tests on the A07 in that thread and a few others. I think that post is the most on-point but isn't exhaustive. Fosi should...

There's some discussion of the inconsistency around power ratings here: https://www.audioholics.com/audio-amplifier/ftc-consumer-audio This is the test where an amp failed during power testing, so there's some understandable reluctance to push contributed amps too hard...

I suppose I must not exist then. https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-hifiberry-dac-pro-xlr.8569/ for £60 is the first that springs to mind. I spent a bit more (but still 2 figures) on used interfaces, and would certainly look at amps in the same...

My guess is something's getting too hot with sustained high output, and protection is kicking in. Whether that's the amp or the PSU I couldn't say. @pma noted the A07 shut down after a few minutes sustaining a lower power output (~50W IIRC). That had a smallish internal heatsink and no...

Because a subset of professionals don't believe they need to do controlled listening tests either, and are as susceptible to marketing waffle as other people. The same may be true of some at the company, or they may just be meeting customer demand - even Belden did that for a while IIRC.

You'll find more plastic bumpers on cars than aluminium ones - probably the most similar loading situation to the suitcase example above. It's also been used for various body panels for resistance to minor dents and the like.