Setting your Amplifiers Gain with DMM
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RE: Setting your Amplifiers Gain with DMM - 2/26/2007 8:29:16 PM
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4lowlife
Posts: 1562
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I smell a sticky.
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RE: Setting your Amplifiers Gain with DMM - 3/14/2007 1:37:59 PM
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nai0013
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Agree, however depending on what type of amp you're trying to accurately to set the gains for you will need diffrent hz testing tracks.
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RE: Setting your Amplifiers Gain with DMM - 10/16/2007 10:44:37 PM
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bobditts
Posts: 687
Joined: 10/16/2007
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quote:
ORIGINAL: nai0013
Agree, however depending on what type of amp you're trying to accurately to set the gains for you will need diffrent hz testing tracks. Also wanted to add that you need to make sure the speakers are disconnected when setting the gains with a DMM.
very ture. a 50hz tone will only work for sub amps. I like to use pink noise. That way, all amps are covered by the same track.
< Message edited by bobditts -- 10/16/2007 10:46:06 PM >
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RE: Setting your Amplifiers Gain with DMM - 11/19/2007 9:45:44 PM
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otnietdehoooo
The Chop Shop Moderator
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can somebody explain GAIN to me? logarithms have never been my strong point so decibels are also a little troubling.
according to the calc above, i need an output voltage of 37.8V. when i listen to my music, i usually use the preset eq's and im almost always using "superbass" "powerful" or "vocal". if i set the gain at a flat eq with no bass enhancements, what will it sound like when i change the headunit controls? can it hurt the amp?
also, my amp came with a "bass control" knob. what exactly does it control? is it just a master volume control for the amp or dose it have anything to do with gain?
thanks for any help. im trying not to annoy you with all of my noob questions about this kind of stuff but i always try and research and understand everything before actually doing it 
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RE: Setting your Amplifiers Gain with DMM - 11/20/2007 7:45:28 PM
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otnietdehoooo
The Chop Shop Moderator
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bump
i dont think anyone saw my post. it doesnt seem like new messages show up on sticky threads
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Matt - 98 4DR 4WD
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RE: Setting your Amplifiers Gain with DMM - 11/20/2007 7:56:58 PM
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hillbillyinOhio
Posts: 2884
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ah, I just saw this.
here is a pretty good explanation on gain.
http://www.bcae1.com/gaincon2.htm
What you are doing with adding bass eq's and such is sending dirty signal to your amp. I wish that I could disable all eq functions on a customers car, because, then they cannot blow their sub. The knob depends on the amp. some are a remote gain, meaning that it changes the input, bad
Most these days are just a bassknob. Turn it up, it will max out tot he point that your gain on the amp is set. Turn it down, basslevel decreases, but the amp setting stay the same.
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RE: Setting your Amplifiers Gain with DMM - 11/20/2007 8:30:45 PM
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otnietdehoooo
The Chop Shop Moderator
Posts: 1620
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From: Ft. Worth, TX
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thanks, that link cleared up a lot of info. so you think i should leave all of the bass/amp controls alone? i dont always want to listen to thundering bass. sometimes i just want to listen to my music normally, what should i do in this case? normally i would change it to "vocal" mode ( less bass, higher mids and sorta high tweets). but if changing the eq can be harmful to the amp ill try not to do it
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Matt - 98 4DR 4WD
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RE: Setting your Amplifiers Gain with DMM - 7/7/2008 10:21:21 PM
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splblazer
Posts: 37
Joined: 4/29/2008
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ther is more to it then that if u want to get really tech happy. get an O scope and test for a clean signal on the head unit for the max volume with a clean signal. then disconect the speakers hook up the Oscope to the amp and with the headunit set to the max clean output scope the amp turning it up till the signal is dirty then back it down till its clean then check the voltage on the amp. remember the max volume on the head unit and the voltage out put on the amp. thats the way mine is set up and when u run alot of power a clean signal is definatly a requirement. the gain on an amp is just there to match the power from the headunit to get a clean signal it will make it louder by turning it up but only at lower volumes so when u turn the headunit up with the gains all the way up on the amp your just going to make the coils in your woofer hott. hope that helps
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