Impedance ... 2.35-12.2kohm
Ouch! That would certainly make it a poor match for the input impedances of a lot of solid state components, especially considering the wide variation of impedance as a function of frequency. Additional detail from the review:
Output impedance is excessively high at 2.38kohm through mid and treble, increasing further to 3.5kohm/100Hz and 12.1kohm/20Hz
A lot of the other differences seem expectable given that one DAC is tube-based and the other is solid state. Although the EVO’s jitter numbers don’t appear to be anything to write home about. Again from the review:
Jitter, in practice, is influenced by noise and other interference emanating from every corner of the digital circuit and is reduced from the 330psec measured with the ProLogue Eight to 160psec (48kHz) and 60psec (96kHz) in the EVO 100, with ±100Hz and ±200Hz PSU modulations the key components.
(The references to 100 Hz and 200 Hz would be 120 Hz and 240 Hz in the USA).
Thanks, @djones51. Regards,
-- Al