Bounty Hunter Posted November 1, 2004 Report Share Posted November 1, 2004 Could someone please point me in the direction of a website/page that explains how to determine the output of an amplifier (or if you are willing to explain it here, that's fine too)? I know this is basic stuff to the EE's on board, but I am trying to learn as I go, mainly by reading and putting stuff together. In other words, if I follow a schematic to build a 10 watt amp, how do I know it's actually 10 watts? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
ansil Posted November 2, 2004 Report Share Posted November 2, 2004 www.ax84.com Quote Link to comment Share on other sites More sharing options...
Fan O' Zakk Posted November 2, 2004 Report Share Posted November 2, 2004 Measure the output voltage of the amp while it's plugged into a correct speaker load. Take the number you get, and square it. Divide by 4. Quote Link to comment Share on other sites More sharing options...
lovekraft Posted November 2, 2004 Report Share Posted November 2, 2004 Measure the output voltage of the amp while it's plugged into a correct speaker load. Take the number you get, and square it. Divide by 4. Well, pretty close - P=E^2/R, so square the AC voltage across the load and divide by the load resistance, 4 if it's 4 ohms, 8 if it's 8, etc. For a realistic figure, use a 1KHz sine wave input and measure the output just below the onset of clipping, using the rms AC voltage. Any legitimate wattage rating will include both the load impedance and the distortion level at the rated wattage. Quote Link to comment Share on other sites More sharing options...
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