No problem, right now I'm using an Ayon Crossfire integrated amp. My only source is the computer audio server running into my Weiss DAC2, which goes straight into the Ayon. And I have a BPT conditioner for the DAC and computer. I have a good room, 18x28 with 10' ceilings and proper treatments, and 2 dedicated power lines. I listen to stuff all across the board, from chamber music to Iron Maiden. That's one thing that really strikes me about the Cirrus, it can do everything well ... many speakers just fall apart of rock or other 'busy' music.
The bass is full and deep, there's not enough of it to shake the room however. But it's enough that my pair of JL Audio subs sit there turned off 99% of the time. Just played Fanfare for the Common Man this morning and it has no problem reproducing the bass drum with proper fullness and tone, and it with just enough energy to make your leg hairs tingle. In my room it seems like they extend into the high 20hz range, based on some pipe organ recordings I know well.
