Questions about setting gain

[skogie1 10+ year member]

I'm new to this and my questions probably show that.

1. If the purpose of the gain is to set it to properly amplify the input signal (output of the HU) and the voltage output of the HU is known, why is setting the gain such a mystery? Why don’t amps just have marked settings for their gain dials that match the HU output? For example, my kenwood deck puts out 2.5v, why doesn’t my alpine amp have a 2.5v mark?

2. I see recommendations to set your gain while playing one set hertz level, but how does that relate to real listening? Real listening has all sorts of wave lengths.

Thanks.

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[LosIsATool 5,000+ posts]

The output voltage changes by the Ohm load the amp sees

 

[SpeedEuphoria 10+ year member]

The output voltage changes by the Ohm load the amp sees

he said output voltage of the HU not the amp

 

[LosIsATool 5,000+ posts]

he said output voltage of the HU not the amp

You set gain by adjusting the output voltage to match your ohm load. Unless you scope it. All the HU voltage does is dictact how high it has to be to get that desiered voltage. The higher the HU output the lower the gain.

 

[Falcons 5,000+ posts]

You set gain by adjusting the output voltage to match your ohm load. Unless you scope it. All the HU voltage does is dictact how high it has to be to get that desiered voltage. The higher the HU output the lower the gain.

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