So we get alot of questions regarding loudspeaker sensitivity. This is not to be confused with efficiency, which is stupendously low… on nearly all speakers. Suppose they are better heaters than transducers…

Beside that, lets just dive in with some real world examples;

Speaker A: 100 db@1w

Speaker B: 97 db@ 2.83 v (8 ohm speaker)

Speaker C: 100 db@ 2.83 v (4 ohm speaker)

So which is going to give us the most sound for the watt? Well hard to say, Speaker C is the least conservatively rated, since its 4 ohms, the 2.83 volts is misleading and gives us a 2 watt power level. Speaker A does not specify an impedance, but implies this db reading is @ 1 watt, not a voltage so if they took the impedance into account A may be the most efficient. Otherwise B and C are a tie. Again, due to the difference in specifications.

Even more fun, measurements matter, were the above at half space? In room ? (Which by the way, is 1/4 to 1/8 space…) who knows. Please ask us, despite alot of spec sheets leaving alot to be desired, we have reached out to our vendors to get an idea of their company standard for testing so we can help you match up speakers with you low wattage SET amps.