Component pairings
What pairs with the FiiO M21?
Each pairing below has been checked for compatibility and headroom. Open one to see how the two components get along — and the real systems that use them.
Checked pairings
1 pairingOften built together
Components that show up alongside the FiiO M21 in systems members have built here and in rigs their owners posted elsewhere. Rigs we catalogued from published builds are left out of these counts, so the product page's Often paired with panel can run higher. We have not written a full pairing breakdown for these yet — open one to see the compatibility check.