I am using a tube preamp some days with the office setup. At the moment the CODA #8 is my headphone amp. In a week or 2, I will change it up so that the CODA #8 becomes my speaker amp and my KRELL 175XD is my headphone amp. I rotate these amps every few weeks because they both sound good in both applications. With the speakers, I have 2 preamps ready to go. The CODA 07x and the Schitt Freya+. I just need to switch the XLR cable on the speaker amp to either the cable from the Coda 07x or Freya+.
I have heard the Freya+ with the CODA #8, but that was when the Freya+ was brand new. I thought it was not bad. It had that tube bloom and was very quiet. I need more time to figure out what type of music I like the Freya+ with. The Freya+, with 100+ hours, is not anywhere near the sound quality of the 07x. The 07x is warm like the Freya+ but it also has a lot of details in the mix. The Freya+ is quieter. though However, I do like the no warmth Benchmark LA4 ($2.5K) over the $7200 Coda 07x on the CODA #8.
I should add that I do like the Freya+ a lot with my Benchmark AHB2 amp when used with my RAAL SR1a headphones. Unfortunately, I had to sell 1 of my AHB2's to fund the KRELL 175XD.
BTW - if anyone is thinking of the CODA #8 vs the KRELL XD stereo amps. I would take the KRELL. The CODA #16 is a different matter. I was planning on upgrading the #8 to the #16 before the CODA price increases on Jan 1, 2022. However, I decided to get the KRELL 175XD instead before the KRELL price increases (I had a great deal). The KRELL 175XD has made me question the need for the upgrade of the CODA #8 to the #16. I am really happy with the #8 now. Not saying any of this makes sense.