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<blockquote data-quote="Alrojoca" data-source="post: 8073702" data-attributes="member: 638714"><p>I think it is a good idea to still set the amp gains, setting it with a DMM is very difficult and you will not get any reading if all the settings are NOT off or flat on both amp and HU and you need a sinewave track at 1Hz if I remember correctly.&nbsp; If your HU has a fixed volume for the sub, your only option is to lower all other settings to flat for trebble and bass, turn off loud or any HU internal amp and just play your loudest CD, with engine on, 3/4 volume on the HU and slowly increase the gain in the amp from the minimum slowly until it clips or you hear distortion then back up the gain a bit from that first sign of distortion, clipping.&nbsp; &nbsp; The thing is you have to do them separate, disconnect the speakers, just hear the sub and set the gain for the sub.&nbsp; Then diconnect the sub and do the fronts, then disconnect the fronts while sub still disconnected to do the rears if that is the case.</p></blockquote><p></p>

[QUOTE="Alrojoca, post: 8073702, member: 638714"] I think it is a good idea to still set the amp gains, setting it with a DMM is very difficult and you will not get any reading if all the settings are NOT off or flat on both amp and HU and you need a sinewave track at 1Hz if I remember correctly. If your HU has a fixed volume for the sub, your only option is to lower all other settings to flat for trebble and bass, turn off loud or any HU internal amp and just play your loudest CD, with engine on, 3/4 volume on the HU and slowly increase the gain in the amp from the minimum slowly until it clips or you hear distortion then back up the gain a bit from that first sign of distortion, clipping. The thing is you have to do them separate, disconnect the speakers, just hear the sub and set the gain for the sub. Then diconnect the sub and do the fronts, then disconnect the fronts while sub still disconnected to do the rears if that is the case. [/QUOTE]

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