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H/U distortion at RCAs or AMP output? ( with o-scope)


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Either way will work and give the same results as long as the amp gain is all the way down, and the crossovers are set open to allow all frequencies to pass through.

40hz for sub 1khz for full range 0db, when setting the amp itself you will want something like -5 though -10db.

 

Also if you are using the headunits onboard amp to power any full range speakers inside the car you will also want to test the radios amp output as well. Chances are high that the onboard amp of the headunit will clip at a far lower volume than any rca output will, so your max volume will be a lot lower.

 

 

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Okay and another question. I have a 4channel amp for the mids and highs , they are 100w rms per door. 

I feel the system is lacking , I've set the gains using the dmm 100w x4ohm ( 400w sqr root equals about 20v per channel) and also using the oscope which gave me about 21v without distortion .

I've set the gains with a 1khz -5db tone. 

Yet it doesn't sound loud enough 

Same for subs. I have 2x12 about 1000w rms and I feel they're lacking too.

 

Some folks said to use the speaker as a load when setting gains because the voltage would be different. 

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