tuning amp with dmm?

[mast240 10+ year member]

did you read the thread i posted bro? it's all in there

 

[Mr.meyhem 10+ year member]

did you read the thread i posted bro? it's all in there

sorry didn't see the second link. ill check it out quick.

 

[mast240 10+ year member]

For your mid/high amp, you will do the same, only you will use a 1khz tone instead

this is the statement in there you should pay attention to... but read through the whole thread, as it may answer other questions for you

 

[Mr.meyhem 10+ year member]

okay so i did the equation. it comes out to 31.62v for my cadence. but its under rated. it has 2 30a fuses so it should handle 600w rms at 2 ohms instead of 500. so do i do the equation using the 600 then? comes out to 34.64v but i don't want it to run the 500 or 600. prbly closer to 170 because i only have the type rs hooked up to it and i don't want that extra draw. so can i do the calculations with that? that would be 18.43v

 

[05trailblazer 10+ year member]

your not constantly going to be hitting like 500-600 atts all the times. just set it how he explained n u should be good

 

[VWBobby 10+ year member]

^^^ exactly.... When you have your volume at 10, lets say, you are not putting out nearly 500-600 watts.. Setting your gains will prevent your amp from clipping or trying to drive more watts than it is designed to handle.

You can also run less gain than needed if your speakers can't handle as much power as your amp can put out. Its better to have more power on tap than your speakers can handle (headroom). //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Just don't crank it up all the way if you hear distortion.

 

[whitedragon551 5,000+ posts]

okay so i did the equation. it comes out to 31.62v for my cadence. but its under rated. it has 2 30a fuses so it should handle 600w rms at 2 ohms instead of 500. so do i do the equation using the 600 then? comes out to 34.64v but i don't want it to run the 500 or 600. prbly closer to 170 because i only have the type rs hooked up to it and i don't want that extra draw. so can i do the calculations with that? that would be 18.43v

Doesnt matter if its under rated or not. Headroom is good. You do the equation based off of RMS power.

 

[Mr.meyhem 10+ year member]

okay thanks. so 14.83v on the cadence. do i need to adjust anything on the amp otherwise? and when tuning for the apsm unhook everything accept for the power, ground, and rem? then play a 50hz tone at 3/4 volume on ur head unit. treble and bass at +/- 0db. (then afterwords u cant turn up your bass and stuff?) and you put the dmm into where you connect the sub to the amp? then for the cadence same thing, but with a 1khz tone?

 

[bubbagumper6 5,000+ posts]

I generally set my speaker amp gain by ear just to level match my subs. Reason being, in my experience I have never needed my speaker amp to run at full tilt, that's usually way too loud. So set your sub amp via dmm, then just set the speaker amp to match it with your ear. You can check it with a dmm after your done to make sure your not clipping but I kind of doubt you will be...

 

[Mr.meyhem 10+ year member]

okay so just run music when I'm tuning the speakers and adjust to the level i like. then unplug everything and play the 1khz and check with the dmm. might try it.

 

[VWBobby 10+ year member]

You really don't even have to unplug your speakers. There's no way you can stand a 1Khz test tone at any volume level that would approach clipping your amp. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

In other words, you ears will bleed long before your speaker amp clips! //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif If you test with a DMM on AC voltage and have your 1Khz tone blaring, I bet it would be down around 14V or so.

 

[bubbagumper6 5,000+ posts]

okay so just run music when I'm tuning the speakers and adjust to the level i like. then unplug everything and play the 1khz and check with the dmm. might try it.

Yeah you really probably don't need to bother with the dmm. Distortion is pretty easy to hear with full range speakers, much more difficult with subs.

 

[Mr.meyhem 10+ year member]

okay or i might try my shooting ear plugs. but yeah ill try tuning it by ear.