Setup is critical and it will vary with the speaker. This includes room treatments. There needs to be space behind the speakers more than beside. Then the recording will be the next most important. Some recordings will never allow speakers to disappear. Many brands can accomplish your request.
Speakers that disappear
I once listened to some speakers where i was surprised by their disappearing act - I don't remember the brand - I think they were stand mounted. I am currently looking for speakers - not too big - and was hoping for recommendations - I know other components matter too but I understand some speakers are noted for this trait and some don't. I listen mostly to classical and vocals, lighter pop - no hard rock (I assume the Beatles and 60's count as "light" :) ) Speakers I have
Harbeth PS3ER XD,
Martin Logan Stylos Speakers (wall mounted)
Aurum Cantus Leisure 2 Speakers,
Enigma Speakers - Enigma Oremus
Had Focal Aria 906
Thanks!