Tvad,
I use the Pass XA100.5 with my Eggleston Rosa (87dB, 6ohm) and I would not go with less power in my 15'X 16'X 7.5'room. They do control the two 6" woofers better than my old XA160 did. But I would say that the XA60.5 could not adaquately power the Andra II in a 24X19 room. But any of the larger X.5 or XA.5 should be fantastic with that speaker.
I use the Pass XA100.5 with my Eggleston Rosa (87dB, 6ohm) and I would not go with less power in my 15'X 16'X 7.5'room. They do control the two 6" woofers better than my old XA160 did. But I would say that the XA60.5 could not adaquately power the Andra II in a 24X19 room. But any of the larger X.5 or XA.5 should be fantastic with that speaker.