Speakers that disappear

In a way, size matters, too. The return of 70’s era wide baffle KLH, JBL, Wharfedale and Mission mid-fi speakers to popularity has as much to with the way they are engineered around the baffle step as it does with their nostalgic warmth and appearance IMO. My Wharefdale Lintons are not fatiguing and very musical for affordable money. As others have shared, it took a while to use a combination of positioning, hardware and settings to deliver a nice invisible soundstage, but they got there. I think a big part of “invisible” is in the midrange, if voices and the tones of acoustic instruments are clear and natural, the source sounds less obvious to my decidedly non-golden ears. 
 

The Lintons dip down to just under 4 ohms and are rated at 6 ohms, so they like current but they are very natural up to a point just short of rattling our 1924 bungalow’s vintage window sashes LOL.

If your P3 doesn’t disappear then you should be lookin’ for other components. I’ve owned that speaker and it disappeared better than the larger Harbeths and other larger speakers that I have owned!
https://www.youtube.com/watch?v=mqFIaiPT_kY

Long ago, I had a pair of diminutive ADS bookshelf speakers that “disappeared” and presented a wonderful soundstage.  I do not remember the model number but they were wonderful … except for lacking substantial base   Fast forward to the present, and my Fyne F-702 speakers come close to doing this.  Superb lateral and fron to rear dispersion, excellent tonal qualities, and much better bass than the old ADS speakers.  I said “almost” because they a fairly large, black obelisks, almost.  But, they do “virtually disappear.”

All speakers can “disappear “

Its almost always placement

and minimal room reflections

as been said above   Minimize 

room reflections and pick music that 

doesn't have widely panned instruments and or vocals

and truly most speakers will disappear 

Good luck Willy-T