Holographic Soundstage ?

Keep in mind I have Mirage OM 6 speakers
Transparent Super Bi Cables
Plinius SA 102 in mono bloc at 740 watts
Pure class A or ab switch

In class A mode after about 45 minutes to warm up i notice a blacker background with a very realistic stage.
Plenty of clear space between musicians with a spooky in the room presence. Not the greatest depth although you get a sense of it but absolutly first rate instrumental tones along with detailed vocals, parting of lips, the foot pedals in pianos, even the room accoustics in recordings, wood floors, high ceilings or cathedrals , a very realistic recreation of the event.

At 740 watts into an 8ohm load the dynamics can startle you. Even so I have 2 Bag End subs in stereo rated at 8htz that add a spatial ambience as well as extend or augment my mains to provide detailed bass response and staggering dynamics!

Love my Plinius gear as i have them in my hometheatre with other fine gear
2 Plinius SA 102s
Plinius SA 100mk3
Plinius M8 preamp
Plinius p 8

I also got a pair of Klipsch Cornwallmk3s 103 db sensitivity
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Dared VP 845 with 1942 nos RCA 845 tubes
18 watts pure class A
The tubes cost more than the amp
1958 nos RCA 12ax7 and 1954 RCA 6sn7
Also a
Cary cad 300sei F1 version with
Latest pair of Western Electrics 300b tube
1944 Sylvania chrome dome 6sn7
My Lampizator lite 7 dac
Possibly upgrading to big 7 mk2
Innuos Zenith mk3 server
With Revelation audio labs cryo silver cat 8 rj45 i2s etherner 2 runs for Innuos
Transparent Reference XL rca interconects out from Lampi
Wireworlds Silver starlite usb
And also a VPI  White Prime superscout turntable
Transparent Reference phono cable etc..
In a very 3d stereo reproduction to use in my home as a reference to my posting above.

Sssooooooo!!!

We have diverged far off the OP Q.
What makes 3D? 
If a  speaker has no potential for fidelity soundstage, it makes no difference what amp/source you use.
If its not there, it aint there.
Rake a  Jadis JA800, hook it up to B7W,, The Jadis will sound like a  B&W sound, which i can't stand. 
I'm searching for fidelity right now.
I am re-inventing the Seas Thors.
The seas FA22RCZ arrives late sunday.

Which will go between the dual W18's. 
The Millennium tweeter is history. 
This  tweeter has fidelity, but the sound stage on complex music is too small, = not 3D.
3D = hight, depth, width. With human vocals perfection. 

Best 3d sound i heard was after hours at a Chicago emporium that had a Art Audio 845 SET. Integrated (Diablo)? driving a single horn Zingalli loudpeaker playing Duke Ellington on vinyl through a Px Art Audio phonostage, SPOOKY REAL!
I felt as if id gone back in time and was looking down from a balcony upon the performers.

I just relate this 2002 experiance as testimony to the importance of proper speaker and amplifier pairings for desired effects or results.
In class A its also important to have a stable 8 ohm impedance to get the best results even with solid state class A.
Ita all about removing the noisefloor.

I hope im not distracting from origionl post as my experiance or testimony as it relates to his desires is my best way imo to be of help.

@grk7007 -- sure ok... whatever you say... 🙄 -- tis a modern miracle that people can type but they can’t read...

anyhow... op has plenty of ’advice’ now... good luck to him in his pursuit

OP is drown in info....and hasn't posted in awhile, either......*L*