NAD M51 -- Used as a preamp

I have a  M51 and love it.   I prefer it as a source ,  the lack of front panel volume control was a serious omission on NADs part though. 

How did the M51 perform for you as a preamp by the way?

Thank you.

I used my NAD M51 as a preamp and it was very good. But I have since upgraded to the PS Audio DS DirectStream DAC that outclasses the NAD M51. If you are in the market for a change I would suggest you think about picking up a DS DAC on the after market. You will not regret the change.