Gain Setting Tutorial

[El_dorado 10+ year member]

Hello I have a Rockford fosgate p4004 4 channel amp, I would like to know How many volts AC should be set on both gains it's 50 rms per channel.. Thanks for the info...

 

[caliece 10+ year member]

Hello I have a Rockford fosgate p4004 4 channel amp, I would like to know How many volts AC should be set on both gains it's 50 rms per channel.. Thanks for the info...

7.07 each cahnnel

 

[El_dorado 10+ year member]

Ok I see what ur saying also is this is for each channel correct ? since it has 2 gains also where do I set the crossover to sound it best 70,125, so it will sound clear ....

 

[caliece 10+ year member]

Ok I see what ur saying also is this is for each channel correct ? since it has 2 gains also where do I set the crossover to sound it best 70,125, so it will sound clear ....

yes for each channel and im having that same question, but i know 7.07 is the read out you should get for 50watts.

 

[caliece 10+ year member]

does anyoe know where i can get a test tone 50hz and 1khz

 

[thuggish3000 10+ year member]

hello guy's/girls, well i have yet another noobie question, actually i have been in this forum for quite a while and still don't understand this gain setting, well i currently own a Lanzar vibe1800D Mono Amp, it runs 400watts RMS@ 4ohms, 800Watts Max@ 2ohms and 1000Watts max@ 1.3ohms, well i have it running in a 2ohm load, the subs that i'm running are 2 12inch Infinity Reference 1230 subs, they will each take 300Watts Rms, well i would like to know how many Volts AC do i need to set this amp at, right now i have the amp gain about 1/4 of the way up the hu is only putting out a 2.1volt Preout..

well thanks for any help..

 

[bsazem22 10+ year member]

I never really knew how to set the gain and I just read the first post with the formula and I went out and set them and wow does it sound A LOT better, it fixed a noise i was hearing with my subs and I just wanted to say thanks for the info.

 

[DBfan187 5,000+ posts]

great reason to use the 3:1 ratio.

Crest Factor

 

[Raisedin305 5,000+ posts]

Somebody that understands how to set the gains on amp hit me up on aim so you could better explain it to me please

aim- raisedin305

 

[chinny 5,000+ posts]

i explained to u last night already and gave u examples. .. Sqrt(Power*Resistance) = Voltage

 

[Raisedin305 5,000+ posts]

i explained to u last night already and gave u examples. .. Sqrt(Power*Resistance) = Voltage

Now I understand...for example in my sitaution...Subs- two 15" Kicker L7s DVC2

amp- KX2500.1

(i want it to get 1000rms to each sub, not 1250rms).

So i do...

2,000(rms) x 2(ohm)= 4,000

4,000 sqrt= 63.245

Therefor I need to set my volume on my headunit to 39 (3/4 of 52) have all my EQ to 0 (bass, treb, sub etc...) With the volume and everything on the EQ down, I raise the volume up to 39 on my headunit, then turn the gain on my amp until my DMM reads 63, correct? This is all I have to do in order to have my gains properly set on my amp? This all done using a 50hz tone.

Question- since I had to set the gain using the subwoofer level on my Headunit at 0 is it still ok to put it up to the max (14/14) without worrying about it blowing or I shouldn't do that?

 

[caliece 10+ year member]

Hi just got my gains set right just need to know how to set the x-over for these pioneer speakers anyone. And it says 40 to 400 on the x-over what is that? and what should i set it to thanks.

 

[Decado 10+ year member]

Now I understand...for example in my sitaution...Subs- two 15" Kicker L7s DVC2

amp- KX2500.1

(i want it to get 1000rms to each sub, not 1250rms).

So i do...

2,000(rms) x 2(ohm)= 4,000

4,000 sqrt= 63.245

Therefor I need to set my volume on my headunit to 39 (3/4 of 52) have all my EQ to 0 (bass, treb, sub etc...) With the volume and everything on the EQ down, I raise the volume up to 39 on my headunit, then turn the gain on my amp until my DMM reads 63, correct? This is all I have to do in order to have my gains properly set on my amp? This all done using a 50hz tone.

Question- since I had to set the gain using the subwoofer level on my Headunit at 0 is it still ok to put it up to the max (14/14) without worrying about it blowing or I shouldn't do that?

Make sure your sub level is all the way up when you set your gains, this way you can turn it down however much you want to depending on what you're listening to. And you also have the chance that if you set your gains with sub level at 0, then if you turn it up to 14, you could be clipping.

 

[Raisedin305 5,000+ posts]

Make sure your sub level is all the way up when you set your gains, this way you can turn it down however much you want to depending on what you're listening to. And you also have the chance that if you set your gains with sub level at 0, then if you turn it up to 14, you could be clipping.

Good point. I want to avoid any clipping since this will be for daily driving. I will only set the gains a little higher than 63v when I compete. I will make sure to set it at subwoofer level 14/14 when setting the gains.

 

[Symon_say 10+ year member]

This is the link of the gain tutorial

http://mobile.jlaudio.com/support_pages.php?page_id=143