Amp Tuning! Help

[Winter_C 10+ year member]

Ok, so i got my meter, set it at ACV 200 right? put + in + output on amp and - on - terminal on amp? set my HU, and put on 45hz test tone like tutorial said....and i begain to adjust gain, and i am up in like 50-60 volt area? and the tutorial said

Voltage of the output = sqrt(RMS Power X impedance of the speaker)

I have a KX1200.1 which does 1200 RMS at 1 ohm, 600 RMS at 2 ohm, and 300 RMS at 4 ohm

My subs are 12" p3's which are 500 RMS and impedance is dual 4 ohm

This is where i am confused...that formula would be voltage= SQRT(30084ohm) for 4 ohm right? which is 34.64...

And if i did 1 ohm it would be? Voltage= SQRT(1200*1)? which is 34.64

And if 69.28 is right, Which I am sure that is the outcome of that, my amp with gain maxed out is only like ~61 volts...And when doing this, the RMS on my subs are 500 each, so do i do 1k? making it be Voltage=SQRT(1000*1) which is only like 31.62 and that means my gain knob would be turned down less than it would be at 4 ohms? and 31 volts on my amp is like 1/4 turn....that doesnt make any sense to me, and from like 5/8 to max, my voltage is like 60ish...is that right?

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[Winter_C 10+ year member]

Anybody?

 

[1rockford1 5,000+ posts]

if your using a multi meter its a waste of time it will not b right. just set it by ear go 3/4 on your deck and go from there. no bass boost on your amp or level boost on your deck. i would allso look at your voltage lets say your seting it the way u want and u get it sounding fine but your getin nasty volt drops its gona **** . just do it by ear and use your meter on your battery to see if your above 13.0 volts

 

[Winter_C 10+ year member]

Gah...I had people tell me that that is the wrong way to do it and i need to use a meter...FML...The whole point to this is, nothing sounds right in my truck and its starting to piss me off, I have tried two JL W10's in a "High-output Wedge box" from a buddy, and compared to my P3's and the 10's aint far off which is sad....and I am trying to figure out why it is sounding so bad, that or i am just deaf and think it isnt loud when it is...but i dont think that this is the case

 

[1rockford1 5,000+ posts]

Gah...I had people tell me that that is the wrong way to do it and i need to use a meter...FML...The whole point to this is, nothing sounds right in my truck and its starting to piss me off, I have tried two JL W10's in a "High-output Wedge box" from a buddy, and compared to my P3's and the 10's aint far off which is sad....and I am trying to figure out why it is sounding so bad, that or i am just deaf and think it isnt loud when it is...but i dont think that this is the case

i would look into some new subs and a nice box bro.

 

[Winter_C 10+ year member]

I know right? I am going to try to dump these P3's and pick up some R 12's...will keep the same amps, cuz I got hella deals on them, and they are pretty nice....but this box was designed by Supergumby5000, and looking at his builds and such, I dont think he would design me a bad box