The reason they use 1khz is because 1khz is in the middle of the range of the human voice (100Hz-3Khz) and at 1Khz the power is at max and doesn't roll off dramatically like it does at higher frequencies. So its kind of misleading...Thanks for the reply again sir. No, I mean it in reference to calibrating your monitoring/recording setup in a DAW. I don't really get what the purpose is. I read an article here about recording and using one recorded at -6db through your D/A converters used to monitor the mix. Something about 85db and a C weight. It goes on to talk about comparing your two speakers, and using it to test your cabling.