Suggested Baseline EQ Settings
I have the 2017 Pacifica Hybrid with the 13 speaker Alpine stereo. I found it to be absurdly heavy on the bass, and decided to prove and eventually correct the problem by setting up a sound level meter and running SPL tests on the system throughout the frequency range. Read on for details on the problem and how to easily mitigate it.
I don't know what Chrysler was thinking on this one, except that it was perhaps a marketing ploy to make the system appear to sound better at first listen, since the average non-audiophile tends to associate high levels of boom with high quality. But the system sounds unnatural and quickly leads to listener fatigue.
The stereo comes with an inbuilt three-band equalizer with a range of +/-9 that can substantially improve the overall sound at no cost, albeit with some limitations. Given a goal of flattening out the frequency response curve, I found the optimal EQ settings (or nearly so) to be the following:
bass: -9
mid: +8
treble: +6
Using that as a starting point, you can then adjust to your preferences, etc., as outlined by user PacificaLimited above. Below are the before (0,0,0) and after (-9, +8, +6) frequency response dB numbers using a reference volume of 10, Stereophile's Test CD 3, speed adjusted volume set to 1, car parked in garage, SPL meter set up near the driver's ear, me sitting in the passenger seat, no one else in the car.
20Hz: 67 -> 60 or less
25Hz: 68 -> 60 or less
31.5Hz: 81 -> 70
40Hz: 90 -> 80
50Hz: 89 -> 78
63Hz: 87 -> 73
80Hz: 78 -> 67
100Hz: 81 -> 72
125Hz: 79 -> 72
160Hz: 70 -> 68
200Hz: 72 -> 70
250Hz: 67 -> 68
315Hz: 64 -> 66
400Hz: 62 -> 64
500Hz: 61 -> 66
630Hz: 62 -> 69
800Hz: 64 -> 71
1kHz: 63 -> 70
1.25kHz: 66 -> 72
1.6kHz: 65 -> 70
2kHz: 65 -> 67
2.5kHz: 64 -> 66
3.15kHz: 66 -> 68
4kHz: 67 -> 70
5kHz: 69 -> 72
6.3kHz: 69 -> 73
8kHz: 64 -> 69
10kHz: 62 -> 65
12.5kHz: 62 -> 62
SPLs above the 16kHz and 20kHz bands did not register on the meter at the test volume, so I omitted those from the list. If you plot these numbers on a chart you can clearly see the reduction in the lows as well as the increased mids and highs. Still not flat by any means, but much better than the stock settings. The bass could stand to be reduced even more (perhaps to as much as -16), but -9 is the farthest down it will go.