Exactly, those who think 6db crossover is better than 24db never understand the main distortion of sound is speaker room interaction.
Room distortions can be among the worst.
Before I installed ceiling diffusers in my room I had plenty of distortion that could easily be mistaken for "digital harshness" and "digital hardness". Yet most of that distortion had from the ceiling, as proven upon its removal by the diffusers (only a small portion of the problem actually originated from my digital at the time).
When I discovered that with the hand clapping test I got a metallic "zing" echo back from the ceiling, I knew that it was trouble and I had to install diffusers.
Yet while the problems with my ceiling may have been particularly severe, I am quite certain that the ceiling is a substantial source of problems in many rooms, especially at elevated volume levels. And of course, on top of that the ceiling is far from the only problem when it comes to room distortions.
The main problem of every audio playback is ac power quality, speaker position (room speaker interaction) , amplifier speaker matching and quality of source (both records and transport/turntable)
Yes. As you say AC power quality is critical, and it can be the source of unexpected distortions as well.
I had the most bizarre experience in that regard when I installed a Furutech e609 6-way power distributor. That came after I already had upgraded my in-wall electrical and my power cords, all to substantial effect.
I didn't think much of installing the Furutech distributor (as a demo at the time) instead of my cheap distributors. Yet I heard the effect already just upon warming up the system with music at *background* volume level. Even at that low volume it was immediately clear how much hardness (also a distortion) had been removed from the sound. Hearing this so easily already at background volume was truly shocking.
Of course, I then was able to abundantly confirm the removal of hardness from the sound at normal listening volume on a good number of critical tracks (bass performance was improved as well, by the way).
The 2 grand that I spent on the Furutech distributor were among the best money I ever spent on my system.
EDIT: Posted before I saw Tom's comment above.


