I recently installed a full system in my car however I want to tune my 4 channel amp for the speakers correctly without overpowering them and blowing them or something.

Here is a link to the amp I am running which has an image of the settings, http://www.jlaudio.com/xd400-4-car-a...plifiers-98261

My door speakers and rear speakers are both TR which run at 50rms

http://www.jlaudio.com/car-audio-evolution-tr

thanks

 

Here's a reply that's better late than never. You need to get an Autosound Disc and go to JL Audio's website or open up the manual that came with your amp to see which frequencies to set your gains to.

You basically hook a multimeter up to the speaker leads, play the indicated frequency on the disc at neutral equalization at a specific volume (this is all outlined in the manual) and turn the gain ****, beginning with its lowest setting, until the multimeter displays the recommended reading for the specific frequency.

It's not complicated at all and only takes a couple of minutes. At this point, you're set to factory specs and you never need to touch the gain ****(s) again.

 

Helpful yes, ^^
but thats the specs for the speakers, not for them playing in a car, let alone your car, not another car.
Vast difference.
Ask me what happened to my sound when i put in CF door panels lol.




real world tuning would consist of the following:

turn off subwoofer if you ahve one.

Use a reference CD or iPod track that is linear and doesnt have any unnatural peaks or boosting ( Skrillex is NOT the stuff to use lol).

set treble and bass and any eq stuff to flat/0

turn gain of front and rear speakers mostly all the way down.


start w the cross over in front at about 80 hz.. ul deal w the rear one later.


you should have the volume of your deck at 3/4th of max. Set it and then leave it.



play your refernce music and increase the GAIN of the front channels until you reach the max volume level youd like, paying attention to distortion from clipping on high frequencies as well as mechanical clapping from low frequencies. You want the midrange and highs to be your stagge, so if you are having mechanical issues w bass notes, leave the gains, but increase the xover freqiency.
Ths is the balancing act.
You are either the guy who wants max volume no matter what and jsut doenst want to clap out his door speakers...
or..

Youre a guy who will scarafice a bit of voume for adequate low frequency reposonse up front.




Once this is done to your liking, set the cross over for the rear a bit higher than the front.. you want to localize lows up front, not behind you, this is a key mistake for most ppls tuning.
(This is all assuming you have similar speakers all around btw)

you can set the gains similar to the fronts or set them a bit lower. If you keep them the same, id sugest fading to the front on your head unit.

Add back your subwoofer and make sure the xover is not set too high on it. If not, you will hear the position of the woofer instead of "hearing it" come from your door speakers.

the idea is that you want to feel ike youre sitting in between to home speakers, l and r. Not hearing 5 different things making noise in a car..

hope this was understandable and helps. By setting it this way, you ahve adequate room for more quiet music. and have the ability to add and remove bass and treble at your liking. Setting the system at its most flat level allows the best adjustability after the fact.

 

i just came across this thread but i have to say this is one of the best posts i have seen about tuning a system yet, great info man.