Tags: #audio # Sensitivity (dB/V, dB/mW) Given in dB/V, sensitivity tells you how many dB ([[Sound Pressure Level (dB)]]) you will get for each volt you apply to the device. dB/mW is also used, but db/V is the preferred measurement. dB/mW is a measure of efficiency that is dependent on the impedance, and different devices have different impedances, so you need to know that as well to calculate dB when given sensitivity in dB/mW, so it's easier to compare different devices if dB/V is used. Source: [Why headphone sensitivity should be given in V, not mW : headphones](https://www.reddit.com/r/headphones/comments/3ou1u0/why_headphone_sensitivity_should_be_given_in_v/)