Please Help With Proper Amp Gain Setting

[phillyflapjak 10+ year member]

Hey everyone maybe someone can help me here. I need to set my gain on my amp correctly but dont know exactly how. I heard that your suppose to match the voltage from your deck on your amp? is that true?

I have a sony xplod MEX BT-2700 deck the pre-outs are 2volt

I have a Alpine MRP-650 MONO Block amp

The gain dial says this min. (which is all the way down) then 2 notches then the 3rd notch says norm. the 4th notch says like .04 then another notch and then max . Sorry if that confuses you guys. In the alpine manual the min. on the gain dial is 4V so which notch do i set it at?

My sub 2010 Kicker cvx 12.

Please help if you can

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