  We study echoes of free massless scalar from dyonic black holes in
Einstein-Maxwell gravity extended with the quasi-topological electromagnetic
term. These asymptotically-flat black holes all satisfy the dominant energy
condition. We find that for suitable parameters, the effective potential can
have double peaks and consequently echoes of quasinormal modes arise. In
general the echo frequency associated with the initial wave packet released
inside the two peaks is about twice the frequency of the one released outside.
