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General Car Audio
Max output from amp !
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<blockquote data-quote="Water Bear" data-source="post: 8820409" data-attributes="member: 673826"><p>That is exactly how that works. Gain is usually expressed in decibels. For example if your gain is some number = 20 * log(V_out / V_in), then V_out = 10^[(some number) / 20] * V_in or, stated a little cleaner, V_out = (some other number) times V_in.</p><p></p><p>If you have your head unit at volume level 10, that's probably less than 1 volt and you will never get your amp's rated power by just maxing your gain. You have to pick an appropriate input level. If you don't know what it is and you're just setting it at 3/4 and praying that's right, you end up in OP's position where you really need to be going higher. Just take out your multimeter and read the AC voltage that your head unit is outputting. Turn up the volume until either 1) you hit 4V or 2) your signal distorts. Or buy an SMD-DD1.</p><p></p><p>...It should be obvious that you shouldn't exceed your amps input limits. Most head units (obviously not all - but we're having to state the obvious now) go up to 4 volts and most amps (again - not all) accept 4 volt inputs. Yes, some go up to 5 and some amps take less than 4 (or a good bit more). Read your spec sheets before YOLOing with gain knobs.</p></blockquote><p></p>
[QUOTE="Water Bear, post: 8820409, member: 673826"] That is exactly how that works. Gain is usually expressed in decibels. For example if your gain is some number = 20 * log(V_out / V_in), then V_out = 10^[(some number) / 20] * V_in or, stated a little cleaner, V_out = (some other number) times V_in. If you have your head unit at volume level 10, that's probably less than 1 volt and you will never get your amp's rated power by just maxing your gain. You have to pick an appropriate input level. If you don't know what it is and you're just setting it at 3/4 and praying that's right, you end up in OP's position where you really need to be going higher. Just take out your multimeter and read the AC voltage that your head unit is outputting. Turn up the volume until either 1) you hit 4V or 2) your signal distorts. Or buy an SMD-DD1. ...It should be obvious that you shouldn't exceed your amps input limits. Most head units (obviously not all - but we're having to state the obvious now) go up to 4 volts and most amps (again - not all) accept 4 volt inputs. Yes, some go up to 5 and some amps take less than 4 (or a good bit more). Read your spec sheets before YOLOing with gain knobs. [/QUOTE]
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Max output from amp !
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