I have owned a Mac MC275 and a Mac C20. Both refurbished. Nice, transparent and warm... Years later I discovered a NuPrime ST-10. It matched the warmth and transparency in its own way, but controls the bass near perfect. The tubes can not match the accuracy, nor bass control I can not speak for all D amps.
Is D for Dry? Class D...
Class D sounds dry and lifeless... thats all, carry on