No, I don't think so.@josby - how did you connect your laptop to the OEM head unit?
I was going to take some measurements of the stock ex head unit, but there is no auxiliary input. Will a male to male USB cord work?
Well, it's possible the LX/Sport radio may behave differently than this - I haven't measured one and it's definitely a different unit than the Touring. So take this with a grain of salt. But if I had to bet, I'd guess it will behave the same.
Don't think of it as the bass decreasing at higher volumes - think of it as bass increasing at lower volumes.
I would calibrate it around volume 30-35. Better to go too high than too low. You could calibrate it at 40, but the signal level of the calibration track is probably at the maximum, while the level of most music won't be, so calibrating at 40 would probably waste some headroom. Calibrating at anywhere from 29-40 will give the same sound profile, just with a lower max volume if calibrated at 40, and the possibility of distortion at volume 40 if calibrated at 29.
Once you have that calibrated, the effect will be that at volumes 29-40, your amps will be getting exactly the signal that's in your music. Below volume 29, the bass level will be slightly higher relative to the rest of the music. Down to volume 20, the increase is pretty slight, though. Below volume 20, the increases get bigger. At that point your music should be pretty quiet. At that quiet level, the extra bass will make things sound better.
So basically you want your amp gains set such that your normal driving-alone-and-jamming-to-a-song-you-love volume position is in the 30's, and your it's-dark-and-I'm-lost-so-I-turn-the-music-down volume is somewhere in the teens.
Where in SoCal are you located? Maybe you can help me tune my car with your RTA?Upon further inspection when overlapping graphs, it looks like the built in dsp does indeed cut the lower frequencies when volume is raised.
In the graph below, I overlapped volume 15 (red) and volume 35 (blue), and you can see there is a ~3db cut centered at 75hz.
I'm out of the AV about 30 miles north of magic mountain. Today is the first time using the REW software so I'm just learning as I go and am no expert. I will be starting my install soon and will have much more experience when I start tuning my setup.Where in SoCal are you located? Maybe you can help me tune my car with your RTA?
Looks like a pretty big cut. How does it sound? How about the volume loss, still plenty loud? Does the fix-86 offer different house curves or just sets the response perfectly flat and then allow tuning to personal taste from there?The red is the EQ pre JL Fix86 DSP and the orange is post. (For LX/Sports models)
There is a tab where you can adjust the EQ for each side (Fronts, Rears, L and R) to taste. The Fix86 does a pretty good job a At leveling thing out and giving you a good starting point - it does get plenty loud.Looks like a pretty big cut. How does it sound? How about the volume loss, still plenty loud? Does the fix-86 offer different house curves or just sets the response perfectly flat and then allow tuning to personal taste from there?