So finally got unit up and running and spent the whole night spinning records and indulging in edibles. A few observations:
1. Out of the box, it sounded better than my PS Audio Stellar which is no slouch. I was expecting a brand new unit to sound dull before break in, but within 15 mins of being on, it sounded really good.
2. It is more quiet than the PS Audio which again surprised me because I assumed a tube based circuit will have higher noise floor. My previous experience with tube equipment was Prima Luna and Rogue Audio; and that experience turned me away from tubes altogether because in retrospect those components didn't have very good resolution, and lacked dynamics and details at low volumes.
3. I agree with prior comments regarding the Mullards, they do a good job with layering the sound stage and offer more natural smoothness. However, the highs and bass could use more punch.With my RCA nos tubes, I get a darker tone, crunchier highs and deeper bass; but the sound stage loses some depth and layering. I compromised by putting the Mullards in the forward position and RCA in the back position. I lose a just tiny bit of layering but get punchier highs and bass.
4. The biggest surprise was how good the volume control was plugged directly into my amp. When listening directly plugged into the amp, I wasn't initially sure my dedicated preamp (Gryphon Pandora) would sound better. For something, I saw as a throw in feature, the CPS has a phenomenal volume control. However, after running phono into Pandora, it is not as good as the Pandora; the Pandora offers better resolution and layering, and adds refinement and warmth to the sound. However, when CSP is plugged straight into the amp, there is a greater immediacy to the sound; overall I prefer the sound going through dedicated preamp. I noticed when going through preamp, using the volume control on the CSP definitely hurts sound, CSP volume control to me is only usable if plugging directly into amp
The Mullards that came with the preamp says made in Russia (so I'm wondering if these tubes I paid $300 for are really NOS tubes or just a recent reissue); I thought NOS Mullards were British made?
Anyway, these are my initial impressions out of the box, I assume sound will improve over the coming weeks. Overall, I am pleased with this component and it is currently meeting my expectations.