jolida 502P bias question

I recently switched from 8 ohm Klipsch rf82 speaker connected to my Jolida 502P 8 ohm taps to 4 ohm Monitor Audio rx8 speakers connected to the 4 ohm taps. Is it necessary to readjust the bias on the Jolida after the switch?
No, it's good to go.
tubes do not notice diff. so no is correct. used to own that amp. ha.
What was your opinion of the amp? Did you tweak anything or change tubes?