The rule of thumb is the input impedance of an amp should be at least 10x that of a preamp. It looks like there should be no problem!
D’Agostino amp with Spectral preamp
Is trying to run a D’Agostino amp with a Spectral totally not doable? The reason I ask is that I was thinking of adding the amp in my system first then getting the Dag preamp or a tube pre later. Later is much later like a year. Do you think this would sound terrible?