My understanding is that the best of the EL34-based amps might have a more tonally rich* midrange, but a less-defined bass. The 6550/KT88-based amps will sound a little-more balanced throughout the 10 octaves--that is, tighter bass, more-detailed treble, and more-than-'adequate' midrange.
I too will be interested in others' observations. I just chose a 6550/KT88-based amp for my center-channel 86dB-sensitive speaker.
* = euphonically colored?
I too will be interested in others' observations. I just chose a 6550/KT88-based amp for my center-channel 86dB-sensitive speaker.
* = euphonically colored?