Two channel stereo is an irretrievably broken format limited to the typical music you hear played at hifi shows (lame). A system has to be painstakingly assembled at high cost and will generally sound acceptable in only one spot in a room, the "sweet" spot.
Scrap this sham and start over with an immersive audio system.
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Audio Engineer explains why "Why Dolby Atmos is Definitely Going to Supersede Stereo"
“We’ve been waiting for a replacement for stereo for decades,” says Jan ’Stan’ Kybert, the engineer responsible for installing the Dean St. Studios facility. “It’s an ancient technology. With music you want to feel something, like with a Saturday night or Sunday morning record. They make me feel ‘Saturday night’ or ‘Sunday morning’. That feeling has been lost with stereo now, and it’s not stereo’s fault, but with Dolby Atmos that feeling is there. It’s bigger, more exciting and wants to make you move, be more intimate, more relaxed or whatever. Everything it does it does it on a richer level.”