I've heard two pieces of equipment that increase the depth of the soundstage - one I own and the other I heard at AXPONA.
A company called BSG Technologies made a processor called the QOL (pronounced coal). This unit is a refinement on phasing processors such as the Carver's Sonic Hologram Generator, which I also own. The QOL is more subtle than other processors of its type but its main benefit is that it deepens the soundstage. I use it over 90% of the time when I listen to music. It was well reviewed by TAS and Stereophile so you can find more information if you Google "BSG QOL review." Originally they cost $4k but you can occasionally find one on the used market for under a grand. I like mine so much I bought a spare from the guy who ran the company.
The other one is the Synergistics Research Atmosphere Infinity. I heard this at the 2018 AXPONA where the company owner put on a really good demonstration. I didn't hear much difference when he added/removed the little HFT thingies but the soundstage absolutely collapsed when he shut off the Atmosphere Infinity unit. He had the system playing with all his tweaks before the demonstration and I remember thinking that this was the best sound at the show when I walked into the room. It really sounded like musicians were playing in the room. This skinny tower goes for about $3500 and if it does at home what I heard at AXPONA it's well worth it. I'm looking forward to auditioning one at a dealer when I get a chance..
Just for the record, I have a fairly optimum setup with a large (16 x 35) room. I'm running Thiel CS6 speakers which are several feet away from the front wall and carefully set up. My system sounds really good without any processing but the QOL adds the cream of increased depth. On a good recording I've had people sit there and gape in disbelief. It's very three dimensional.
A company called BSG Technologies made a processor called the QOL (pronounced coal). This unit is a refinement on phasing processors such as the Carver's Sonic Hologram Generator, which I also own. The QOL is more subtle than other processors of its type but its main benefit is that it deepens the soundstage. I use it over 90% of the time when I listen to music. It was well reviewed by TAS and Stereophile so you can find more information if you Google "BSG QOL review." Originally they cost $4k but you can occasionally find one on the used market for under a grand. I like mine so much I bought a spare from the guy who ran the company.
The other one is the Synergistics Research Atmosphere Infinity. I heard this at the 2018 AXPONA where the company owner put on a really good demonstration. I didn't hear much difference when he added/removed the little HFT thingies but the soundstage absolutely collapsed when he shut off the Atmosphere Infinity unit. He had the system playing with all his tweaks before the demonstration and I remember thinking that this was the best sound at the show when I walked into the room. It really sounded like musicians were playing in the room. This skinny tower goes for about $3500 and if it does at home what I heard at AXPONA it's well worth it. I'm looking forward to auditioning one at a dealer when I get a chance..
Just for the record, I have a fairly optimum setup with a large (16 x 35) room. I'm running Thiel CS6 speakers which are several feet away from the front wall and carefully set up. My system sounds really good without any processing but the QOL adds the cream of increased depth. On a good recording I've had people sit there and gape in disbelief. It's very three dimensional.