Radio Shack SPL Meter Corrections
------------------------------------
                   10hz.....+20db
                   12.5hz...+16.5db
                   16hz.....+11.5db
                   20hz.....+7.5db
                   25hz.....+5db
                   31.5hz...+3db
                   40hz.....+2.5db
                   50hz.....+1.5db
                   63hz.....+1.5db
                   80hz.....+1.5db
                   100hz....+2db
                   125hz....+.5db
                   160hz....-.5db
                   200hz....-.5db
                   250hz....+.5db
                   315hz....-.5db
                   400hz....0db
                   500hz....-.5db
                   630hz....0db
                   800hz....0db
                   1k.......0db
                   1.25k....0db
                   1.6k.....-.5db
                   2k.......-1.5db
                   2.5k.....-1.5db
                   3.15k....-1.5db
                   4k.......-2db
                   5k.......-2db
                   6.3k.....-2db
                   8k.......-2db
                   10k......-1db
                   12.5k....+.5db
                   16k......0db
                   20k......+1db

THX Home Theater   16000 -8.5
                   20000 -11.2