I think you are confusing input voltage sensitivity with voltage gain. If you "add" the gain to the input sensitivity, you get rated output voltage of the amp.
What you need to know is either the voltage gain of the amp or the voltage needed to drive the amp to full output. You can then use the two formulas to figure out the gain: P=Vsquared/R and Gain=20log(V2/V1).
What I am trying to find is this,can I run both power amps 29 and 20.6 at the same time through one pre amp and get the same volume level to the speakers.In other words will one set of speakers running on the 20.6 be loader than another set of speaker in another room using the 29 amps Hope you can help alwyn
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