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Gains setting?


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boulderguy 
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Posted: October 31, 2006 at 9:08 PM / IP Logged  
It boils down to whether you trust your ears or the little markings on an amp switch.
Besides, setting gains by ear takes all of 5 minutes.
stevdart 
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Posted: October 31, 2006 at 9:59 PM / IP Logged  

noneedforaname wrote:
if you know the HU voltage, it makes it alot easier to get the amp close to where it needs to be, in most cases close enough for the average everyday listener.

This forum doesn't want the average everyday listener, after he becomes a member, to stay "average".  The forum contributors have learned how to properly set gain and its importance, and drill that importance into every member seeking to learn how to set gains.  Part of the process is to first learn how to ignore the voltage markings around the amp's gain and to pay less attention to the spec'd voltage output of the deck.  The gain-setting process can't be 2-6-8'd;  it has to proceed start to finish with no shortcuts...and so virtually any combination of audio gear can be level-matched for finest performance the gear will allow.

noneed, I'm singling your quote out but don't consider this a challenge to your knowledge or professional integrity.  It's just another of many, many similar responses when the term "close enough" is used in this forum when referring to gain setting.

To the original poster, search this forum (see the icon above) for 'gain' in the subject.  You will find several threads detailing the steps and links to downloadable test tones that must be used.  No special equipment is needed for finding proper gain levels using the hearing method.  (...but it does take me longer than 5 minutes  ;)  When you hear that tone change at the point of clipping, post back and let us know if you said "aha!!"

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: November 01, 2006 at 10:54 AM / IP Logged  

noneedforaname wrote:
that's the whole point of knowing the head units preout voltage, eliminates all the guessing and testing. if you know the HU voltage, it makes it alot easier to get the amp close to where it needs to be, in most cases close enough for the average everyday listener. you're right, it doesn't change the process, but i wouldn't say HU voltage doesn't matter and shouldn't be considered in tuning, IMO.

I completely disagree and think this is bad advice.  Head unit preout voltage changes constantly with program material.  What the manufacturer rates this voltage at is generally at peak or max.  It is almost never correct for adjusting gains, and the markings on even the best amplifiers are also almost never correct.  Anyone who thinks setting gain means matching the markings on the amp to the printed data on the box of a head unit is not a professional in my book, and "close enough" is never good enough, and if this is your company's policy you should no longer wonder why many of us are down on big-box store installations.

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aznboi3644 
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Posted: November 01, 2006 at 3:31 PM / IP Logged  
I just wanna ask...noneedforaname, did you copy off of NOUSEFORNAME??
mike12volt 
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Posted: November 01, 2006 at 9:37 PM / IP Logged  
Question is: How Do You Close This Topic?
stevdart 
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Location: Pennsylvania, United States
Posted: November 01, 2006 at 9:58 PM / IP Logged  

mike12volt wrote:
Question is: How Do You Close This Topic?

...and you want to know this because...?

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
mike12volt 
Copper - Posts: 98
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Joined: September 17, 2006
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Posted: November 05, 2006 at 3:28 PM / IP Logged  
The point was already made that you still need to set your amp gains according to your speakers. No matter how advanced your amp is you need to find a clipping point and set it right below it.
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