ElVito1981

iTrader: (4)

hey what's the formula to set the gain? I have a digital multimeter. Also, anyone know where I can download a test tone CD to do this?

DMCfirestar500

Formula= sqrt(impedence * wrms)

Realmofexcursion has plenty of downloadable test tones. Remember to only use a tone at 0 Db.

ElVito1981

iTrader: (4)

is it the total RMS wattage, or per channel?

DMCfirestar500

Well, it depends on the setup. Are you bridging the channels, running more than one sub?

ElVito1981

iTrader: (4)

i'm just listening to two front speakers, no rears no subs

slickrick

iTrader: (12)

i just set gains by ear...

AscendantMax

iTrader: (7)

http://www.soundsolutionsaudio.com/f...showtopic=3704

just set each channel to the voltage you get after you do the formula.

ElVito1981

iTrader: (4)

ok, the website says to never set the volume on your head unit above 75% of the maximum volume. Why is that? I know that if you turn the gain on the amp all the way up, the amp will overheat. But a head unit doesn't overheat right?

AscendantMax

iTrader: (7)

most head units might clip when pushed beyond 75% volume. so people just made it a rule of thumb not to go past 75%, although an oscilloscope can really tell you if it's clipping at that level or not.

WhiteMaxima9600

If my gains are below about 75% then i have to turn up the volume over half way to even hear my subs..... my gain is like 90% up now

slickrick

iTrader: (12)

yikes my gain is at about 35-40% and I have my sub control on +2 out of +6.

WhiteMaxima9600

must me those dam* RF amps then! O well when it goes i'll get somethin better