Responses from gammajo

I have an expensive player that does both SACD and Red Book CD well, but while some SACD are good, very little of my music that I like the best is on SACD, so I use the SACD part very seldom. Hope this helps. 
Mono Blocks on a Budget, is it possible?
Getting two Nuprime STA 9's for 649 new each might fit the bill and they have audition period. I have Nuforce/Nuprime Ref 20 and had the Ref 9V3se mention in previous post, both are terrific, as well as Bob Smith's mods 
Testing 6H30 tubes
Thanks BarrySandy, will track down these leads 
Testing 6H30 tubes
Thanks for your input. My understanding is that I could hurt the tubes by using the wrong tester settings, so will look for someone with a 6H30 tester 
Good Used Speakers ($8K-10K) For A Little Listening Room
Pick up a pair of Von Schweikert VR4 JR s used. I have heard them sound terrific in a room your size 
My exp. with Focal Sopra No.2 , Harbeth 40.2, Passlabs XA30.5 and Hypex NC400
Look up tuning dots at Marigo Audio - developed by physicist turn window vibration into heat - they will truly tame your windows. Acceptable visually compared to acoustic panels etc.  
Best redbook-only CD Player under $10k - Bryston BCD3, Resolution Audio Cantata 3.0, ....
Ayon CD5s used or new Ayon CD35se. Robust tubed power supply and output stage, class A preamp with analogue volume control included. Best I have heard and I have heard many. 
Aftermarket Fuses
I would put Audio Horizons at top of my list in terms of improving sound. Seemed to get rid another layer of imperceptible noise (until that noise is gone) so cleaner and more natural. 
Best used or new DAC under $3500
The Ayon CD5s uses NOS Burr-Brown - nice chip 
Best used or new DAC under $3500
Mikhaelkuz, Thank you. Yes a very good sound especially with NOS Russian Reflector tubes for the 6H30's. It seems to have more life, natural liquidity, dynamics and microdetail, while being just as transparent  and quiet as the upper end solid sta... 
Best used or new DAC under $3500
Ayon CD5s which has excellent DAC and Preamp with asynchronous USB and analogue volume control. With tubed power and output, best sound that I have heard just more musical and dynamic. Selling nice one, just factory checked. PM for details 
What’s in your system today that you also had 10 years ago?
Rack, room, two thirds of my music, PS Audio Quintet, most important some of my audio friends 
What are your thoughts about moving up product line(s) within a Company?
Once I find a company where I love their philosophical approach, reliability, customer service, and most importantly "signature sound" meaning what they value most in reproduction - then I am inclined to up the chain for me that has been loudspeak... 
Dynamic compression in speakers themselves?
Check out Von Schweikert Audio speakers, particularly VR 55 and above -  one of their primary goals is to create great dynamics . I play moine in large room for long periods at classical concert volume and can play for hours without fatigue 
Need recommendation for amplifier
First,  am very surprised you are having trouble with Nuforce repair person. If it is who I am thinking of, myself and many of my friends who have Nuforce amps have received excellent service from him as recently as last week. PM me for his name. ...