I recently received the Harman Kardon 635 receiver to compliment the 340 mains and center, 170 surrounds and HSU VTF-3 MKII sub. When the receiver performs its auto EQ, it sets all of the speakers at large. The crossover for the 340's and 170's are set at 40Hz and the sub at 120 Hz.

It seems as though the receiver is overestimating the speakers for best sound vs. capability possibly.

Is there specific size and crossover settings that the speakers should be set to for optimum performance?

Joe