Constant noisy tubes maybe go solid state?

So are you saying the QS tube preamplifier is working reasonably for yournow paired with your Odyssey solid state amplifier?

Doing some research on this the past weekend having gotten lucky with prior tube pre and SS amp combos along with tube amp combos, wondering what you might be experiencing. And, back to what jackd said, as you already know.  

The QS preamp is a "low noise" line stage preamp with only 100 ohm output impedance, 18db gain.  Your Odyssey amp apparently is more favorable when matched with preamps with no more than 14db gain. A notable output/impedance mismatch more than voltage.  So, I guess I sorta see why you would be fishing for low gain tubes on the preamp side. Your preamp is more ideal for good low noise tube amps, single-ended or ultra linear. When ready, down the road, and pending on your speaker types and efficiency, maybe try a good pair of mono tube amps with your preamp. Its a lot of fun. Good luck.  Look up impedance, matching too, not just voltage, gain.  

https://www.psaudio.com/pauls-posts/lowering-impedance/

I was just asking a general question about hiss/hum from speaker drivers either ear up to driver or 3 feet away. As one turns the volume up when should it be noticeable and then turning it down when should it not?  Thx !

It should not be noticeable AJ. I had a problem with minor buzz/hiss with the volume on at normal volume without music from a few feet away and it went away completely when I got a power conditioner.

Of course I use SS - not sure about tubes, but I know they can be noisy.

One example, having a humming (unclean) coax cable from a cable TV company plugged into nearby boxes sharing similar or conjoined AC outlets on the same circuit back to the junction box can do this too.  Amps with big transformers can simply amplify this too, right to your speakers. Bzzzzzzzzzz. Many years ago finally caved and went to a dedicated AC circuit and power-conditioning station. Much better.  

@sokogear
Thx dude! My entire system - phonostage, preamp, amp, are tubes and I have an Audioquest Niagara 5000. I think you’re right though, my home theater is solid state and dead quiet. Idk worth the compromise for me and it’s not audible until the volume is at least half way turned up with my ear pressed against the speaker. At a couple of feet away no level is audible but of course I’m 53. Lol.