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<blockquote data-quote="squeak9798" data-source="post: 1885932" data-attributes="member: 555320">For starters turn off the lowpass crossover on the HU or set the frequency as high as it&#039;ll possibly go.&nbsp; If the HU&#039;s lowpass crossover is set to 50hz, then that means the 50hz tone you are playing is being attenuated by -3db.2nd, where is the volume level set at when you are setting the gain?3rd, set all of the settings (EQ, level settings, etc) to where they will normally be when you are listening to music.&nbsp; Don&#039;t turn them all the way down if that&#039;s not where they will typically be when listening to music.&nbsp; This excludes the Xover.&nbsp; Either turn the xover off, or set the frequency as high as possible so that it won&#039;t affect the tone you are playing (like it currently is).Lastly...yes, you can measure the preout voltage from the HU with your DMM.&nbsp; The downside of using the DMM is that you won&#039;t be able to tell if the signal is being clipped or not at a given volume setting.&nbsp; But it&#039;ll give you an idea of what HU is capable of outputting voltage wise.&nbsp; Stick the red lead of the DMM onto the center of the RCA cable, and the black lead from the DMM to the outter shield of the RCA cable.</blockquote>

[QUOTE="squeak9798, post: 1885932, member: 555320"] For starters turn off the lowpass crossover on the HU or set the frequency as high as it'll possibly go. If the HU's lowpass crossover is set to 50hz, then that means the 50hz tone you are playing is being attenuated by -3db. 2nd, where is the volume level set at when you are setting the gain? 3rd, set all of the settings (EQ, level settings, etc) to where they will normally be when you are listening to music. Don't turn them all the way down if that's not where they will typically be when listening to music. This excludes the Xover. Either turn the xover off, or set the frequency as high as possible so that it won't affect the tone you are playing (like it currently is). Lastly...yes, you can measure the preout voltage from the HU with your DMM. The downside of using the DMM is that you won't be able to tell if the signal is being clipped or not at a given volume setting. But it'll give you an idea of what HU is capable of outputting voltage wise. Stick the red lead of the DMM onto the center of the RCA cable, and the black lead from the DMM to the outter shield of the RCA cable. [/QUOTE]

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