Vinylshadow is right. Look for a used Classe SSP 800 av preamp surround processor in used markets. The SSP 800 originally retailed for $9500 but it’s been discontinued since 2017 and nowadays a used one can be had for around $2k. The Classe also works as a high end stereo pre as well and it sounds very very good in two channel for music. I would say in two channel sound quality wise the Classe SSP 800 is comparable to high end stereo preamps costing around $5k to $6k. Classe put priority and optimized the SSP 800 for music (two channel).
What’s your stereo preamp?
I happen to have the Classe SSP 800 up for sale on US AudioMart under caphill. Contact me on US AudioMart if you are interested. I’m selling it for $2k and is in mint condition and I have all original accessories : remote, packaging / box, user manual, etc.