It finally got measured over at Audiosciencereview.com.\n\nI thought the results clearly raised doubts about the effects of the lack of preamp mode. Amir found similar shutdown issues Gene found when he (actually may as well say "they") did the 20-20,000 Hz sweep with no speakers connected. \n\nHis results also showed pre out up to 1.5 V yield decent results but got ugly past that point, up to 0.02 % neighborhood THD at 2 V. Even 0.05% wouldn't look bad to us but Amir is used to much lower values when he tested real ext. DACs so needless to say he wasn't impressed.\n\nIf you ignore the DAC performance (not exactly a dac but it's Amir you know..) part, as an amp using analog inputs the thing left the NAD T777 Vs and 758 V3 in dust, that's his words not mine. It was better than the RX-A1080 too, but only for analog inputs, otherwise the Yamaha won, thought all on paper only; and imo the differences wouldn't be audible to most users.\n\nAnyway, his measurements sort of explained why I thought the X3400H sounded as good as my A21\/840W amp\/preamp, as I was using my external DACs connected to the X3400H's analog inputs.