Discussions pmboyd has started

Most musical and grainless Holland Amperex 6DJ8/ECC88?2832
Mullard e188cc, e88cc or CV2492?3030
Mazda/RTC e88cc or e188cc? Halo getter (1960s) or dimple getter (1970s)?2780
Difference in sound between Siemens e88cc and e188cc?181321
Mitchum or Blackburn for the Mullard 6922?90128
Quantify the difference between Holland Amperex e188cc/7308 and USA Amperex 7308/e188cc?3664
Which has richer tonality, the Holland e188cc or the USA 7308?84815
How does the sound of the PCC88 and PCC189 compare to the 6922/6DJ8 and its iterations?126512
6922 Amperex PQ White label... D or O-getter? Holland or Hicksville?147526
Need help interpreting tube code 3P3A R6J2741
Why not put crossover networks in accessible compartments?124522
How much does a Zobel network and its components affect the sound of speakers?284441
Acoustic Zen M2 digital vs Audience Au24 SE digital vs Wireworld Silver Starlight 8?7150
Black Cat Silverstar/Analysis Plus Digital Crystal comparison8520
Zu Event digital spdif experience?4910