RazorRust Posted April 1, 2021 Report Share Posted April 1, 2021 I set the gain on my amp using a 40hz -5db test tone. I open a song in audacity, peak amplitude is -0.8db. I apply a 40hz LPF in audacity and make sure the peak amplitude is below -5db. But then I realized the LPF on my amp is set to 80hz not 40hz. If I apply a 40hz LPF in audacity, peak amplitude drops from -0.8db to -4.8db. If I apply a 80hz LPF in audacity, peak amplitude drops from -0.8db to -2.9db. Just trying to wrap my head around why I should use 40hz test tone to set my gain instead of a 80hz test tone. Link to comment Share on other sites More sharing options...
Dafaseles Posted April 1, 2021 Report Share Posted April 1, 2021 40 hz is said to be the middle ground between 80 hz and 20 hz. It's only to simplify things. That being said, i know plenty of people who will actually set their gains with a sweep, rather than a test tone. But, to my knowledge, you can't do that with a DD1, you have to use an oscilloscope 2011 Chevy Silverado under construction My build log here. Check it out! Link to comment Share on other sites More sharing options...
Kyblack76 Posted April 1, 2021 Report Share Posted April 1, 2021 Depends, but, 40hz at -7.5 is what i roll with, or did. Edit- also, i cut my subs at 55hz. Because, well, they are subs. My mid range, is cut at 55..... SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
Kyblack76 Posted April 1, 2021 Report Share Posted April 1, 2021 Also, 40hz and 1khz is "industry standard" SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
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