Help with DB Calculations

[LDK180]

watts is power, the ability to do work, like power amplifier that can drive speakers. That's where the power is dissipated, not at a cd output, tape output or phono output. Tha amplfier supplies power and the speaker consumes it. Go back to your physics books.

You must also remember that the power that runs your equipment comes from energy stored since before the Big Bang.

 

[RayW]

watts is power, the ability to do work, like power amplifier that can drive speakers. That's where the power is dissipated, not at a cd output, tape output or phono output. Tha amplfier supplies power and the speaker consumes it. Go back to your physics books.

If the circuit is complete and current is flowing then power is being delivered/consumed (actually transformed but that's a different discussion). It's perfectly legitimate to measure a CD player output in watts, just not done in general. Just because nobody specifies the CD output that way doesn't mean it's wrong, it's just not a standard. Measuring a source output in watts would give you a better idea of how many parallelled amps the source could drive than simply stating the voltage.

Just a different way of stating the same thing. Lightyears per fortnight is a legitimate way of stating speed but you'll never see it on a car speedometer.

Ray

 

[ferninando]

piky piky piky

 

[catrafter]

Just to raise a point, there is also dBV (dB referenced to 1 Volt), dBW (dB referenced to 1 Watt), etc.

Tom