Mark these locations on the floor with a minus sign made from the same color tape as used in the prior step. Be aware that the maximum SPLs found may change from frequency to frequency due to the capa...Mark these locations on the floor with a minus sign made from the same color tape as used in the prior step. Be aware that the maximum SPLs found may change from frequency to frequency due to the capabilities of the loudspeaker/subwoofer. What is important here is the locations of the peaks and valleys along with the difference between their SPLs. Compare the locations of where the peaks and valleys occur as well as the decibel differences between them.
