After reading and testing a few loudspeakers that are vented, I was wondering if the vent on a vented center channel speaker should always be facing the front esp if the tunning is above 50 Hz. Otherwise you lose the effects of the port. Am I correct? My center channel has a rear firing port and the 1 m response looks like a near field with no port recorded. The speaker is tuned to 66 Hz but the F3 appears to be about 104 Hz.