DB scales -10 dBV vs+4 dBu reference

dB scales -10 dBV vs+4 dBu reference

0.0dBV = 1.0 volt @ 10k ohm This is the reference for -10 dBV consumer systems
-10dBV = 0.316 volt

0.0dBu = 0.775 volt @ 600 ohm = 1 mW This is the reference for PRO +4 dBu systems
+4dBu = 1.23 volt

20 log(Volts/0.775) = dBu ; 20 log(Volts/1.0) = dBV

(dBu/20) (dBV/20)
(0.775)10 =Volts ; 10 =Volts

dBu = dBv (small ' v ')

dBm is a POWER measurement, 1 mW into 600 ohm = 0.0 dBm

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