topping a90d

I have the D90LE in pure DAC mode with the A90 Discreet on XLR with the preamp off. I use my Mac laptop to play music and use a usb c adapter and hook up to the Mac with usb. For some weird reason, sometimes when I connect to the Mac I am able to control the volume sent to the dad from the...

How is the a90d preamp comparable to the pre90? If you want to get a level preamp with a purifi or hypex power amp better than the pre90 or the a90d? with the a90d I would also have a headphone amp and trigger out .. if the performance were the same perhaps better the a90d