my amp puts out 400 watts at 4ohms with a dmm what should i set the gain's to??
most of the time i just set it by ear but i want to see how off i am
Str8 out of the sticky...
Tuning your amps
The simplest and easiest way to get your amps tuned is to follow these simple instructions. Grab your digital multimeter and a calculator.
output = square root (watts * ohms)
First, take your amp's wattage at load. For example, let's say your amp does 300 watts rms at 4 ohm. That would be 1200. Take the square root of that and you'll get 34.64101615137755, so let's say 34.64. Take your multimeter and set it to AC volts. Disconnect your speakers from the amplifier. Grab this file here -
http://www.realmofexcursion.com/audio/testtones/20Hz_to_120Hz.mp3 - and burn it to a cd. Turn your eq's off, turn your volume to 3/4 of the way up, hook up your multimeter to the + and - of the speaker outputs and play the sine wave. Your peak voltage should hit at the beginning of the cd - adjust your gain till it reads the voltage you figured out earlier, then leave it. Hook your speakers back up, and your gain is set. Don't turn your volume up above this volume or else you'll clip.
RE Audio
i know that much i forgot how to do the square root
If you're using microsoft's calculator, do 1600, then x^y, then .5, that'll give you your square root.
