Kudos for actually posting them.

What software do you use?

What was the volume setting on the first and second graph? The second seems to be a quite a bit higher output.

It's hard to judge with the varying output levels, but they look pretty similar to me. If anything, from 1 click above 1k to 3 clicks above 1k looks like it may have smoothed a bit (not sure on the scale). I don't know how much the factory eq'ing changes at different volume levels, but it would be interesting to see the response with all volume settings being the same.

Either way, props to actually showing the graphs.

 

This is another pre-mod graph I took but hadn't uploaded to photobucket from the laptop. Laptop died so I had to come in and plug it in to post.


Bass at -4, treble at 0. This one displays the dip and spike just before, at, and around the 8k mark. i think....

 

Not sure about the volume thing. I just took the advice of someone posting a tutorial on RTA analysis who said to turn it up to a comfortable level but not to the point where things are shaking, etc. I did not realize at the time I took the pre-mod graphs that I would be comparing to post-mod graphs. I simply wanted to see how my response curve compared to another persons on here who had some better quality components who also directed me to a thread on DIYMA who were discussing the ideal response curve(s).

Rather than the 1/1, going to see if I can find a free program that will do 1/3 octaves

 

Nevermind, I cannot find anything decent for free.

I am happy with the results and that is the point of this. Yes, well I can tell you that the sound is clearer, specifically vocals and drums. Guitars also have more meat down low and not so airy as before....

just my .02.

 

What are some good brands for the 06 tl for upgrading the speakers and amp

 

If you want to improve the clarity of the audio system, replace the electrolytic capacitors in the power amp. That did more to improve my fidelity than anything else.
.
.

 

You will need to do some research as this car is very particular about amplification. I will tell you my JL Amp works extremely well with the low level input from the HU. Speakers will be a personal choice. My Image Dynamics Chameleons paired with the JL and bridged are a tremendous improvement.

None of the modifications to this car can be done without proper planning unless you want less than desirable results. This is the link to my adventure that has proven to be very successful. https://acurazine.com/forums/3g-tl-a...-fever-854353/

Let me know if you have any questions.