>>Finally, the rca connections are horrible; the xlrs are much better & reliable<<
Totally untrue. There are some extremely high quality RCA connectors available just as there are very poor balanced connectors. Many manufacturers use only single ended connections on their amps and preamps because they believe them to provide performance either superior or equal to balanced connections. OTOH some manufacturers such as BAT and Atma-Sphere design their products for balanced connections. As always YMMV.
Totally untrue. There are some extremely high quality RCA connectors available just as there are very poor balanced connectors. Many manufacturers use only single ended connections on their amps and preamps because they believe them to provide performance either superior or equal to balanced connections. OTOH some manufacturers such as BAT and Atma-Sphere design their products for balanced connections. As always YMMV.