![]() ![]() This test helps you benchmark the lowest limit of your audio system's frequency extension.īecause of their increased wavelength (nearly 20 meters at 20 Hz), achieving high output at low frequencies usually requires large drivers (subwoofers). The lowestīound, 20 Hz, with a wavelength of nearly 20 meters, is aįrequency we feel rather than actually hear. Also use music from different sources, either a CD, your iPod, etc.Humans hear frequencies from 20 Hz up to 20,000 Hz. And you’re finished.Īlso note that you should use music that’s not: rap, techno, or heavy metal so you can hear any distortion clearly. Increase your amp’s gain and watch out for a buzz, dial it back down until it hums. ![]() Choose the test tone with the most minimum and clean volume setting and play it again using the same settings.Repeat step number 2, and use the different test tone levels.Back off a little until a humming sound returns. Increase your receiver’s volume until you hear a buzz. While your gain is at a minimum, play the 40 Hz test tone. ![]()
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March 2023
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