yycdave
New Member
I have a pair of Yamaha NS-670 speakers that have a stated output SPL of “96dB/1m 6.3 Watts Input”. Now I know that SPL is generally stated as dB/1m/1W. I’m trying to determine what the standardized SPL Sensitivity would be for these. I know that doubling input power will increase output SPL by 3dB so am I correct in assuming that the inverse is true as well, i.e. if the stated 6.3 W is halved to 3W the the Output SPL would be 93, and a further halving to 1.5W would result in an SPL of 90dB?
FWIW NS-690II speakers have a stated output SPL of “90dB/1m 1 Watt input” so Yamaha changed how they stated their specs and my numbers seem to be in the general area.
I know this is an imprecise calculation but is there a mathematical formula that I could apply?
FWIW NS-690II speakers have a stated output SPL of “90dB/1m 1 Watt input” so Yamaha changed how they stated their specs and my numbers seem to be in the general area.
I know this is an imprecise calculation but is there a mathematical formula that I could apply?