Why are you not using the amp in the Rogue? and what tubes are you using in the pre section. I roll Mullards and NOS Brimars in my Sphinx 3 depending on my mood. The sound is warm and detailed. Maybe better tubes would help, I stream from Tidal via Bluesound Node with an MHDT Orchid DAC Sell the Mytek and look into a better DAC and try some new tubes.
Preamp/DAC Suggestions
I'm currently using a Rogue Sphinx v2 as a preamp with a Mytek Brooklyn amp. Looking for ideas for preamps. I primarily stream Tidal/Qobuz from a BlueSound using a Schiit Multibit DAC but also have my tv plugged into the DAC and use the Rogue for volume control. Speakers are Focal Aria 926s. Looking for something that will give me a really quiet background and more soundstage. Also open to upgrading DAC if that's where I'll get more bang for buck. Budget is under $5000 for DAC and preamp. Other option would be upgrading the integrated and selling Rogue and Mytek, but I like being able to switch around pieces to play with the sound. I'm open to tubes or solid state but really like a totally dark background.