Power / Voltage / Decibel Conversion Charts

Posted by Wayne Parham [ 32.97.110.142 ] on October 18, 2006 at 20:57:03:

In Reply to: Re: Prosound Shootout 2006 Measurements posted by Wayne Parham on October 16, 2006 at 21:21:18:

The measurement datasets are all referenced to 2.0v levels. So the conversion chart below is useful for calculating SPL in terms of power and comparing with other levels. The chart is referenced to 1 watt.


Voltage   Load Impedance  Power       dB
========================================
1.0v          16Ω        62.5mW    -12dB
1.0v          12Ω          83mW  -10.8dB
1.0v           8Ω         125mW     -9dB
1.0v           4Ω         0.25W     -6dB
1.0v           2Ω          0.5W     -3dB
2.0v          16Ω         0.25W     -6dB
2.0v          12Ω         0.33W   -4.8dB
2.0v           8Ω          0.5W     -3dB
2.0v           4Ω           1W       0dB
2.0v           2Ω           2W      +3dB
2.83v         16Ω          0.5W     -3dB
2.83v         12Ω         0.67W   -1.7dB
2.83v          8Ω           1W       0dB
2.83v          4Ω           2W      +3dB
2.83v          2Ω           4W      +6dB
4.0v          16Ω           1W       0dB
4.0v          12Ω         1.3W   +1.25dB
4.0v           8Ω           2W      +3dB
4.0v           4Ω           4W      +6dB
4.0v           2Ω           8W      +9dB
========================================

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