Unfortunately, I agree with others on here. One example is the thread about the low recording volume. It doesn’t take a spectrum analyzer for most people to understand there was an issue with low recording volume. Sometimes listening with our own ears IS the proof. Things are only subjective and opinion based to a point. Putting in random scientific facts along with the “my knowledge is far superior” attitude can support a claim but at some point, it really is annoying.
The OP did start this thread about the sound quality vs other units, which is valid and made many of us take a look or another listen to the X1800. Most haven’t noticed a significant difference vs other equipment but his and your points are still valid.
Sometimes, it’s the WAY you say something vs WHAT is actually said that makes many want to ignore it completely.