The Nad is more vesitile (main-in/pre-out).
The Audio Refinement Complete has no pre-out or main-in.
The Audio refinement Complete Alpha (latest itteration)has pre-out but no main-in.
The AR is a much better amplifier though. It may say 50watts but it is a very beefy 50 with a steep slope to the volume pot. I have it on a pair of speakers that are a dreadfully inefficent 86db. At about the 12 o'clock position they are as loud as most would want.
The AR just adds another layer of depth to music. THere is more air around instruments and voices.
Good luck!
The Audio Refinement Complete has no pre-out or main-in.
The Audio refinement Complete Alpha (latest itteration)has pre-out but no main-in.
The AR is a much better amplifier though. It may say 50watts but it is a very beefy 50 with a steep slope to the volume pot. I have it on a pair of speakers that are a dreadfully inefficent 86db. At about the 12 o'clock position they are as loud as most would want.
The AR just adds another layer of depth to music. THere is more air around instruments and voices.
Good luck!