Did you tap on the tube or chassis to check microphonics in each? In what way was the RCA black plates your favorite?
thanks
I tapped on the chassis, something about tapping on tubes with the top off scares me. I'm an electrical engineer, fear (or respect) of electricity never factored into my educational choices for some reason.
I liked the warmth of the RCA mid-range. The bass is a little weak and the top end doesn't sparkle, but overall the sound is close to what I am looking for. After living with these for a week or so, I am picking up on some upper-mid range distortion that I didn't notice before. It's not bad, but knowing it's there makes it stand out more when it does pop up.
I am not done yet but I can live with these tubes for now.
Todd