That is extremely important in order to maintain {HEAD ~ delays} between {TAIL ~ channels} measured during factory calibration, especially when a channel combining technique is used, such as that set forth in U.S. Pat 
between
That is extremely important in order to maintain { HEAD ~ delays } between { TAIL ~ channels } measured during factory calibration , especially when a channel combining technique is used , such as that set forth in U.S. Pat
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH