Report Will this headphone keal amps? in Headphone Amplification Posted November 19 Okay, that was an exaggeration on my part. But dB/V (or dB/A for that matter) makes sense only if the load impedance is known. And in my opinion, the utility of dB/V falters if the load can force the amp to exceed the bounds of its current or power delivery. As in - cease being a perfect voltage source.