Matching Level between unbalanced & blanced audio

I wanna connect
primaluna prologue 3 which only has rca connectors

to

dynaudio bm6a mkii which only has xlr connectos.

2 options I can think of.

1.

Connect with RCA to XLR cable.
One end is RCA and another end is XLR.
Or using RCA/XLR adapter.

2.
Using matchbox.

Which one is better?
I check few matchbox but I am worry about degrade sound
when I use matchbox.

Which option is better?
or is there some other option that can be better?