Originally Posted by suixt
I'm in front of a crossroad and would like some assistance with my dilemma.
I don't see the dilemma. The Parasound will likely be a trouble-free amp that will sound superb with the LS50s -- my A 21 does, whereas the Primaluna will open up the hobby of tube rolling, e.g.,
* Rated output power into 8 ohms, 1% THD: triode mode, 40Wpc (EL34, 16dBW), 42Wpc (KT88, 16.23dBW), 45Wpc (KT120, 16.53dBW); ultralinear mode, 70Wpc (EL34, 18.45dBW), 73Wpc (KT88, 18.63dBW), 85Wpc (KT120, 19.3dBW).
* Frequency response, ±1dB: 7Hz–65kHz (EL34), 7Hz–70kHz (KT88), 7Hz–75kHz (KT120). THD (1W/1kHz): <0.1%.
* Signal/noise: 92dB (EL34, KT88), 93dB (KT120).
* Input sensitivity: 320mV (EL34, KT88), 360mV (KT120).
So the question is: Do you want to listen to music or do you want a hobby? One of my duties as a grad student was checking tubes for microphonic. MC60s were the lab standard 50+ years ago.