Is there a problem w/ using both amp inputs?

Kr4 is right. The only thing I would add is that your BAT is fully balanced, why not just use it for everything? Its an outstanding preamp.

I have and it didn't work with my SS mono amps when both XLR and RCA inputs were connected to 2 different preamps. The volume was severely attenuated ... my amp is not balanced design so it's a pseudo XLR. I doubt it's in user manual so just try it out.

Thanks. I followed Kal's advice and contacted ML.

Here is their response:

"Yes, this configuration will cause problems and is not recommended; doing this will:
· Place the output stages of the DAC and the preamp in parallel with each other.
·Place an ‘uneven’ load on the XRL input.
While these conditions will probable not damage the No. 336 or the DAC/preamp the sound quality of all three will be negatively affected."