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Message: <blockquote data-quote="iceteebone" data-source="post: 1074458" data-attributes="member: 549344"><p>get a dmm.  get a 50 hz. 0 db test tone.  set your deck the way you like it.  turn the volume up 3/4 the way up.  take the rms output of your amp, multiply that by the ohms, then find the sq. rt. of that number.  that is your target voltage.  so say a 100 watt amp at 4 ohms would be 20 volts.  disconnect your sub.  turn the gain all the way down, bass boost, etc.  play the test tone.  set your dmm to AC.  put the leads on the positive and negative of the amp.  turn up the gain until you reach the voltage you had figured out earlier.</p></blockquote><p></p>

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