I apologize for expecting utility and fidelity, rather than pointless measurebation
As I wrote in the post you quoted, the volume defeat switch on the back (which wasn't called out in the review, and one has to squint to see in the picture) upgrades the volume knob from demerit to useless appendage.
As a basic amp, this one, assuming reliability etc., seems fine enough so long as one's OK with a small and load-invariant but broad treble dip. Since most electronics are so irrelevant in terms of effect on the actual sound of a music reproduction chain, it's hard to care too much one way or the other..
I'm not interested enough to actually the test the audibility of that treble dip (not in the market for a basic amplifier, and honestly if I were I would prioritize flat FR anyway), but it would be eye-opening if a small but wide bandwidth treble depression like that is in fact inaudible. One can imagine a certain loonie-with-a-vendetta lining people up to do a double blind test to smear
@amirm and "prove" two Amir-recommended amps "sound different" without giving appropriate context around either the reason for the difference or the practical impact of it.