Tube Amps With Good Bass Qualities

@brownsfan

Another vote for Atman-Sphere

I completely agree, and I will also add that most speakers with  drivers presenting a 8/10 ohms load (or more) "nominal" will provide good bass qualities for most tube amps, that's the "happy match" you mentioned. I have MA-1's and love the sound. BTW which "right tube complement" you have (power and driver tubes)

Thank you, I have kind of the same experience, not using the WE+ but the CV-181-TII (Shuguang BT) very decent tube, comparable to the Psvane, the Psvane is prone to failure IME, and very similar to the BT. Like you RCA and Raytheon NOS 40's and 50's produce good results, I have short bottle Sylvanias not bad boys but same plate if I remember correctly these are 6SN7W and sound is good too. The standard chrome top from Sylvania I agree produces some sparkle (I thought it was just me as most people like the chrome tops). If Ralph could have made the M60 and MA1 with the driver tubes sockets a little more spread you could use the boutique chinese in every position, that will mean possible re design the chassis of course