Limited soundstage between speakers

You might want to use the following youtube clip for testing, which I believe is a good recording. Set up your speakers placement according to the actual stage and see if the SS within or beyond the speakers. Also close your eyes to feel the depth of the SS and how well each instrument is separated. In my living room where the side walls are not closed by, the SS created by my system is indeed wider than speakers and I could pinpoint the position of each performer. You need to move the speakers away from front wall to acquire the SS depth. You could also turn the speakers with slight toe-in angles to improve the images but not too much to affect the SS width.

Half of my recorded albums at LEAST and more present sound outside of the back/front and left /right vertical plane between the speakers

+1 @newbee and @mahgister your system is wired out of phase if this is what you hear.  Frankly, I don’t understand half your posts, and the other half I just flat out disagree with.  You’re an odd duck dude. 

Sorry but out of phase cannot be coherent like the acoustic factor which is "listener envelopment"aka LEV...And nobody will put 7 headphones in a closet like i did because of out of phase effect in his room is not it ?...

Educate yourself in basic acoustic...I even post a doctoral thesis explaining it in a post above...

Most of the times my music is in a depth dimension in the axis back/front and my soundscape impression are like an headphone intimate listening but the sound is out ofmy head...

My room is dedicated and contains at least 100 Helmhotz resonators, and diffusers also... A grid of 12 cheap Shumann resonators, 3 types of ionizers, a passive material treatment also with a balance between absorption, reflection, and diffusion...

I use also a wood screen behind me with many acoustic resonators and diffusers using with it the back reflections and lateral one to create this headphone effect...

The sound fill my room OUTSIDE of the speakers plane ...

if you dont know anything about acoustic for sure you dont know how to create listener envelopment and you dont even know what is the Helmhotz method...

Then in your ignorance it is better to explain my soundscape by "out of phase" effects but anyone reading my description about my acoustic coherent soundstage and imaging and listener envelopment know immediately that distortion cannot create a coherent image for all albums with different audible acoustic cues; and out of phase effect even if they are in my room cannot ERASE my acoustic devices power by itself anyway....

If you dont understand something it does not means that my posts make no sense... It means you dont KNOW the power of acoustic in a speakers/room relation... You are not alone, most audiophile ignoring acoustic speak about their gear in a fetichist way, ignoring that we listen to the Systen/room not to the system ALONE and by itself....

If someone has never lived through an acoustic transformation it is unbelivable anyway....i spoke by experience and experiments....

Experiment you may try at NO COST : put a set of plumber tubes vertically in your room of different lenght, do nothing else, the change negative or positive will be evident... Then tune them like i described and transform them in an Helmholtz resonators or in a diffuser and you will begin to understand...This is a mechanical tuning of the room by Helmholtz method but this cannot replace passive material treatment no more than passive material treatment alone can replace Helmholtz mechanical method...Acoustic is more complex than " buy an upgrade and plug it in the wall " yes....But it is also more powerful than most uppgrade anyway and cannot be replace by an upgrade...Most people dont get it anyway ....

This is only a simple experiment , no cost at all...Some junk discarded plumber tubes of various size is better...After assessing for yourself  the negative or positive effect you will know and then the hard task will be fine tuning.... it takes only time and fun listening of music... Simple no ?

Acoustic at the end process alas! is a complex set of experiments yes, but it may cost NOTHING...I never bought any costly products.... Then have fun....It cost time and listening experiments yes to fine tune a system/room relation...but it is fun....

LIke me you will perhaps discover that upgrading your gear may be meaningless considering the ratio S.Q. / price ratio you already enjoy after acoustic tuning...

My best to you, apologizing for my rant, but that can be useful for someone here if not for you....

After all, how many people inform us all about acoustic power in audio thread with words enough powerful to ask for the attention necessary in this IMPORTANT audiophile underestimated matter ? Not many and those who speak about spoke about it with a too low voice to be understood in the general gear fetichism pervading audio thread...

+1 @newbee and @mahgister your system is wired out of phase if this is what you hear. Frankly, I don’t understand half your posts, and the other half I just flat out disagree with. You’re an odd duck dude.

+1 @mahgister.  Obviously you have spent many years with the time involved with the development of your sound room.  Unfortunately, while many of us would love to have a dedicated sound room, it is for the most part not a practical undertaking.  That leaves some of us with very challenging room environments, but I applaud your knowledge regarding your experiences and advice.  

tThen tune them like i described and transform them in an Helmholtz resonators or in a diffuser and you will begin to understand.

Uh, I doubt the recording engineers used Helmholtz resonators when they mixed the recording. Also, as a reviewer I got to hear many $500k+ systems in well-treated rooms, and in NONE of them did I hear 50% of the sound coming from outside the speakers unless the recording called for it, and 95% do not. If you’re hearing 50% of the sound coming from outside your speakers, you’re out of phase unless every other ultra high-end system I’ve heard is wrong. Or, maybe you just have a “magic system” that is mysteriously better than every system out there is wrong. My bet, you’ve constructed a room that radically diffuses the sound so you get width at the expense of center fill. You could get that much easier with some cheap Bose 901s. Again, you’re off on your own island and I don’t even understand you.