I.C.E. (Audio) & Electrical Upgrades Post all your I.C.E. (In Car Entertainment) and wiring questions here (Audio, video etc.)

question about gain

Old May 15, 2005
  #1  
shmik1's Avatar
Thread Starter
Premium Member
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (6)
 
Joined: Dec 2003
Posts: 4,773
Likes: 0
From: IL
Rep Power: 320
shmik1 has disabled reputation
question about gain

If my amp is 600rms and the gain is about 3/4 then the amp can only push 3/4 of the rms, right? so about 450rms is what the sub would get with the deck on max, right? so a would a 500rms sub be ok with that?
Reply
Old May 16, 2005
  #2  
MegaHurtz's Avatar
Banned
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (6)
 
Joined: Mar 2004
Posts: 51,077
Likes: 4
From: B.C., Canada
Rep Power: 786
MegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud ofMegaHurtz has much to be proud of
oh god, no

gain is a sensitivity control that is meant to make your amp achieve full output based on the level of input signal... so in example if you have a deck with 4v preouts and a gain that is adjustable between 4 and 0.2 volts, you would set it all the way down and still get full output. Turn it up any higher and you risk blowing up both your sub and your amp.

gain is not a volume control!!!!!!

and yes 450w on a 500w would be fine... sub ratings are just recommendations for power
Reply
Old May 16, 2005
  #3  
jttegx's Avatar
OMNES AD UNUM
iTrader: (3)
 
Joined: Sep 2003
Posts: 5,855
Likes: 0
From: NOR-CAL
Rep Power: 333
jttegx has a spectacular aura aboutjttegx has a spectacular aura about
Originally Posted by MegaHurtz
oh god, no

gain is a sensitivity control that is meant to make your amp achieve full output based on the level of input signal... so in example if you have a deck with 4v preouts and a gain that is adjustable between 4 and 0.2 volts, you would set it all the way down and still get full output. Turn it up any higher and you risk blowing up both your sub and your amp.

gain is not a volume control!!!!!!

and yes 450w on a 500w would be fine... sub ratings are just recommendations for power

on my brutus hifonics amp, it seems like the amp pushes the sub harder when the gain is lower (.2v) which is all the way to the right (clockwise) if it goes to the 9v mark, it barely sounds.


my deck has 6.5v preamp outputs, my gain is set on the halfway mark
Reply
Old May 16, 2005
  #4  
J187's Avatar
 
Joined: Sep 2004
Posts: 4,559
Likes: 0
From: MA
Rep Power: 310
J187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of light
Dont' be fooled by labels. When an amplifier labels it's gains control in Voltage, it's generally the voltage required to reach full power given a certain signal. So, when you turn the **** all the way to the right, which is turning the gains "up", the label says .2v - what it's saying is that the gains on the amp or so god damned high at this setting, it would only take an input signal of .2v to reach max power.

Conversely, when you turn em down to 9v, its saying the amp needs an imput signal of 9 volts to reach full power - you are given it 6.5v theoretically, so it doesn't reach near full power - it barely sounds.
Reply
Old May 16, 2005
  #5  
eye_see_you's Avatar
let the devil out
Hey! Look At Me!! I'm a Supporting Member!!
iTrader: (13)
 
Joined: Oct 2003
Posts: 10,632
Likes: 0
From: Harker heights Tx
Rep Power: 387
eye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant futureeye_see_you has a brilliant future
JL has a method to determine what is the best sensitivity setting on the input for best power. Such as turning off all HU eq settings then setting the volume at 3/4 then slowly adjusting the gain to reach a certain level of output voltage coming out of the amp speaker connection outputs. Of course this is with say a 50hz sine wave and no speakers actually connected using a DMM. This was its a recommended wattage on output.

I believe hifonics has a similar method to setting up the amp from my old days of using them.
Reply
Old May 16, 2005
  #6  
J187's Avatar
 
Joined: Sep 2004
Posts: 4,559
Likes: 0
From: MA
Rep Power: 310
J187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of lightJ187 is a glorious beacon of light
Originally Posted by eye_see_you
JL has a method to determine what is the best sensitivity setting on the input for best power. Such as turning off all HU eq settings then setting the volume at 3/4 then slowly adjusting the gain to reach a certain level of output voltage coming out of the amp speaker connection outputs. Of course this is with say a 50hz sine wave and no speakers actually connected using a DMM. This was its a recommended wattage on output.

I believe hifonics has a similar method to setting up the amp from my old days of using them.
It's important to note that the 50hz wave would be used only for an amp driving a subwoofer. If you were setting the gains on an amp for your front stage, you would use a 1KHz wave.
Reply
Related Topics
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
carid
General Automotive Discussion
1
Nov 7, 2015 01:46 AM
kmarcet
8th & 9th Generation Civic 2006 - 2015
9
Sep 26, 2015 10:25 PM
Farticle69
Mechanical Problems/Vehicle Issues and Fix-it Forum
1
Aug 6, 2015 08:02 PM
jessica19699
Mechanical Problems/Vehicle Issues and Fix-it Forum
9
Jul 29, 2015 05:51 AM
ballmich
Mechanical Problems/Vehicle Issues and Fix-it Forum
0
Jul 9, 2015 11:59 AM


Thread Tools
Search this Thread

All times are GMT -5. The time now is 04:07 PM.