Is this the right way to set amp gain?
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=47235
Printed Date: April 27, 2024 at 8:02 AM
Topic: Is this the right way to set amp gain?
Posted By: mrdragon
Subject: Is this the right way to set amp gain?
Date Posted: January 08, 2005 at 9:04 PM
Hi guys,
Can i ask is this the right way to set my car amp???
My sub rated @ 400RMS into 4 Ohms
So 400 X 4 = 1600
And.....Sqt of 1600 = 40
So i can use the Mutilmeter and set my amp gain upto 40 and i will be safe from damaging my sub right???
Cheers :)
Replies:
Posted By: phuzun
Date Posted: January 08, 2005 at 10:03 PM
I think the best way is to use an oscilliscope and just put it at the max without clipping. You could just use your ears if you cant afford or dont have access to one.
Posted By: bullman96
Date Posted: January 10, 2005 at 1:02 AM
the multimeter method is fine as long as you listen well and make sure there is no mechanical strain on the sub. 400rms is what the voice coil can take, the box will determine how much the rest of the sub can take. use the multimeter to set the max the amp can supposedly put out before it clips if the rms is the same as the sub, and then turn down from there by ear. an oscilliscope is best though
Posted By: DYohn
Date Posted: January 10, 2005 at 1:23 PM
Actually you should not use the speaker RMS power rating, but the amplifier's. What's the RMS output of your amp? ------------- Support the12volt.com
Posted By: mrdragon
Date Posted: January 10, 2005 at 9:16 PM
My sub RMS is: 400
and my amp can produce 150RMS BRIDGED!
Thanks :)
Posted By: DYohn
Date Posted: January 10, 2005 at 10:07 PM
Then the max output from your AMP should be set for 150 watts. At 4 ohms, that would be approx. 24.5 volts AC (using a 0db test tone at, say, 60Hz and max non-clipping output volume from your head unit.) If you were to try to get 40 volts from that amp, you'll be clipping like crazy. ------------- Support the12volt.com
Posted By: mrdragon
Date Posted: January 11, 2005 at 12:58 AM
Ok thanks DYohn :)
i also wanted to know does it worth the upgrage to buy a 500RMS amp for my Pioneer TSW305C, this sub can handle 400RMS.
Currently i use 150RMS to run it, but don'w know how much diff will there be after the upgrade, just don't want to spend on the money if it's not worse it!
Cheers :)
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