Most “disappeared” speakers.

My most wide soundstage speakers were the old Bose 901s. Distance from wall and more importantly wall material are critical however. I had an apartment with brick wall (3 deep) separation and the sound was magnificent. Moved to a house with drywall and I couldn't sell them fast enough. My message: Room is everything. Good luck!

Ohm 5000; lots of power behind them; don’t be afraid of adding a sub.

Oh and Andy is right....on both counts.  The room is everything.

When you get a chance try this. Blind fold yourself and have someone guide you towards a dynamic speaker. You will know right away when you are right on top of it. Do the same for any full range ESL and you will walk right into the speaker. 

I bought a pair of Vienna Acoustic Beethovens, rosewood finish, store demos from tweeter around 2004 and 10 years later I decided to upgrade my speakers and sold the VA's first were the R107/2, then the F52's then the salon 1's then the VA strauss then the salon 2's then the usher be-20 dmd's...and finally I went back to a used pair of VA Beethoven's! All the speakers did some things better but at the end of my search for the holy grail of loudspeakers I found out I was really lucky when I stumbled onto the beethovens.

Nice, give a listen to vimberg mimo and other model...i dont think you can find better for 30k. He has a bookshelf that isnt completed yet, coming out...its already pre sold its first run. 

very true about ESL's.  one way around dynamic point sourcing is by using multiple active speakers.  4 beolab 3's with a beolab 2 work extremely well in this regard in one of my rooms.  not so easy or achievable with passive speakers, unless they are hybrids with some ESL component

Electrostats combined with a good sub - sublime. 

OB’s, aka Open Baffles, aka speakers w/o a box design. Combined with 2 subs and a low watt tube amp, very tough to beat for quality sound on a reasonable budget. 

Lx521. Sound field is wide and realistic 

In that price range new and used you have a lot of choices in vanishing speakers. I was lucky enough to find a pristine pair of Maggie 3.7, sent them back to Magnepan for a total refresh and they emerged as the lastest model the 3.7i all for less than $4K.
Just be aware that the more transparent a speaker is the more it will reveal the shortfalls in your sources and supporting equipment. 

The omega super alnico without any crossover is a nice choice for a disappearing speaker. 

With a sub and low watt single ended amp it is sublime. 

I have a set of Dahlquist DQ10s with two Dahlquist Subs, that I have upgraded here and there along the way  These speakers were always noted for their sound staging and disappearing. 

These speakers can even do sounds that can move around the room . . . even passing, in its illusion, right through your head. I bought them used back in the 80's and still have them today.

@select-hifi 

‘hole’  ?? Huh? 

Horns
single driver 
concentric driver
wall mounted
sealed box
ported box
isobaric configured
line array 
omnidirectional 
line transmission 
AMT based


I’m sure I’ve left some out

shkong78 wrote:

You can try out Magnepan LRS with generous 60 days return policy.

Planar speakers are known for disappearing act.

Boy, did I learn that when I brought home a pair of Magneplanar 1.7s in Nov. 2013. 5-1/2 years later they are more stunning than ever. I recently put on Holly Cole’s “Temptation” LP and the resolution, dynamics, and imaging were all stunningly mesmerizing. I have some Acoustic Sounds remaster/reissues that put the artists (e.g., Nat Cole, Diana Krall Trio, Count Basie, Frank Sinatra with Basie or Nelson Riddle, etc.—take your pick) right in the room.

The Maggie 1.7s combine nearly massless dipole diaphragms with 924 sq. in.  (per pair) vibrating surfaces. These are vibrating surfaces that approximate the areas of piano soundboards and the spruce tops of celli and bass viols, all with radiating patterns that approach those of the instruments themselves.

@johnnyb53, have you heard the new MG30.7? Oh, baby! How 'bout the old Tympani T-IVa?

I heard the MG30.7 at my local high end store's "Music Matters open house in March 2018. Pretty dang awesome. I never heard any Tympanis. I had a co-worker who had a pair, but I never made it over to his trailer. That's right, he had a pair of Maggie Tympani IVs and lived in a trailer park.