Menu
Forum
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Gallery
New media
New comments
Search media
Members
Registered members
Current visitors
Classifieds Member Feedback
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Register
Forum
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
Log in / Join
What’s new
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Menu
Reply to thread
Forum
Car Audio Discussion
Amplifiers
Gain Setting Tutorial
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="IamDeMan" data-source="post: 1063012" data-attributes="member: 557673"><p>OK I followed this guide to set the gains on the amp I am using in my wifes car (directed 1100d5). I got a few anamolies I would like to know if they are usual.</p><p></p><p>First thing I need to know is how to tell or know if a sine wave your are using is at 0db reference? I used a tone generator <a href="http://www.nch.com.au/tonegen/" target="_blank">http://www.nch.com.au/tonegen/</a> to make my sine waves.</p><p></p><p>Next thing is why do they say to use 50 hz for the sub? I found that my amp made 8volts more on a 40hz tone. I am guessing it is because most music creates a prominent 50hz and less at 40hz. am I correct in assuming this? In any event I used the 40hz tone and figured that would make the setup that much safer.</p><p></p><p>Lastly I noticed that on my rear channel the left side made .5V less and on the front channel my right side made .8V less. Is this normal? shouldn't they be identical, or at least closer than that?</p><p></p><p>Lastly and this is why I ask about the 0DB reference, when I set them this way, my music was louder than when I just set them without a multimeter. What I did before the DMM was just play a loud bass cd and set the sub gain until I got decent output, then I did the same with the mains but with a loud rock CD. I ask this question, because everyone else seems to be *****ing about how quieter it is after setting.</p><p></p><p>One other thing that isn't related to the gain setting is I am going into thermal shutdown after 20 or so minutes of full volume listening. This happened before setting it and now after setting it. It also happened with my Rockfords. After it shuts down I feel the amp and it is cooking. I think I may be getting bad voltage drops when playing loud. I will take my new DMM and confirm this then I will do the BIG 3 here soon and see if that rectifies that problem. If it isn't that, what should I look at next?</p></blockquote><p></p>
[QUOTE="IamDeMan, post: 1063012, member: 557673"] OK I followed this guide to set the gains on the amp I am using in my wifes car (directed 1100d5). I got a few anamolies I would like to know if they are usual. First thing I need to know is how to tell or know if a sine wave your are using is at 0db reference? I used a tone generator [URL="http://www.nch.com.au/tonegen/"]http://www.nch.com.au/tonegen/[/URL] to make my sine waves. Next thing is why do they say to use 50 hz for the sub? I found that my amp made 8volts more on a 40hz tone. I am guessing it is because most music creates a prominent 50hz and less at 40hz. am I correct in assuming this? In any event I used the 40hz tone and figured that would make the setup that much safer. Lastly I noticed that on my rear channel the left side made .5V less and on the front channel my right side made .8V less. Is this normal? shouldn't they be identical, or at least closer than that? Lastly and this is why I ask about the 0DB reference, when I set them this way, my music was louder than when I just set them without a multimeter. What I did before the DMM was just play a loud bass cd and set the sub gain until I got decent output, then I did the same with the mains but with a loud rock CD. I ask this question, because everyone else seems to be *****ing about how quieter it is after setting. One other thing that isn't related to the gain setting is I am going into thermal shutdown after 20 or so minutes of full volume listening. This happened before setting it and now after setting it. It also happened with my Rockfords. After it shuts down I feel the amp and it is cooking. I think I may be getting bad voltage drops when playing loud. I will take my new DMM and confirm this then I will do the BIG 3 here soon and see if that rectifies that problem. If it isn't that, what should I look at next? [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Discussion
Amplifiers
Gain Setting Tutorial
Top
Menu
What's new
Forum list
