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<blockquote data-quote="DarkScorpion" data-source="post: 6835061" data-attributes="member: 618537">In theory, yes, you&#039;re supposed to match the output voltage of your deck. However, that is almost never the case - the 4v rating is usually attained by the manufacturer when the deck is maxed out and most likely clipping the signal. There are many, many different ways to set your gains; the most common ways are via DMM, oscilloscope, and by ear. All three have their merits as well as disadvantages - you&#039;ll have to do some reading and use your own judgement.The gain knob shouldn&#039;t be used as a volume knob. While yes, it does increase the output, it shouldn&#039;t be used as such - it should be set once and not touched again unless you&#039;re retuning. The reason why 6v is counter clockwise and .2v is clockwise is because if your headunit is putting out a higher powered, 6v signal, you shouldn&#039;t need to turn the gain &quot;up&quot; as much versus a .2v signal in order to achieve the same output. The marking on the amp is the voltage of the input signal. A higher voltage signal doesn&#039;t need to be turned up, whereas a low voltage signal does, in layman&#039;s terms.</blockquote>

[QUOTE="DarkScorpion, post: 6835061, member: 618537"] In theory, yes, you're supposed to match the output voltage of your deck. However, that is almost never the case - the 4v rating is usually attained by the manufacturer when the deck is maxed out and most likely clipping the signal. There are many, many different ways to set your gains; the most common ways are via DMM, oscilloscope, and by ear. All three have their merits as well as disadvantages - you'll have to do some reading and use your own judgement. The gain knob shouldn't be used as a volume knob. While yes, it does increase the output, it shouldn't be used as such - it should be set once and not touched again unless you're retuning. The reason why 6v is counter clockwise and .2v is clockwise is because if your headunit is putting out a higher powered, 6v signal, you shouldn't need to turn the gain "up" as much versus a .2v signal in order to achieve the same output. The marking on the amp is the voltage of the input signal. A higher voltage signal doesn't need to be turned up, whereas a low voltage signal does, in layman's terms. [/QUOTE]

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