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I don’t know if y’all are aware of the recent issues with Ohmmu and Tesla updates, but starting a month or two ago, the Tesla firmware update (I believe only for the Model 3) started giving a 12V error and not allowing further updates. Note that the battery works fine, it’s just reading it as faulty, but it gives a constant nag error message, drains the Main battery due to attempting but failing updates daily, and requires you to disconnect the penthouse to actually update. Because of this, I recently switched back to my lead acid. I took the opportunity to further try and settle the Ohmmu bass issue by recording a frequency analysis before and after the swap back.
Note that this comparison was done under identical circumstances. Same song (which has good highs and lows). Same volume. Same EQ. Windows closed. Climate control off. Phone in generally the same position, though I can’t say it’s exact (hopefully for bass analysis it won’t matter).
the first image is from the Ohmmu before the swap back.
The second is my original factory lead acid.
Don’t look at the teal bars. Those are instantaneous readings from after the song stopped. Look at the peak lines at the top, those are the maximum frequencies reached during the song. I know the bass lines are a little obscured but they’re still readable.
What I notice is that the bass response seems identical. Interestingly, there’s a second treble peak on the OEM that I don’t see on the Ohmmu. Now I guess treble could be very sensitive to phone position, though again it was generally the same. But my subjective listening did seem that the treble seemed louder with the OEM, even before I looked at the results.
So although the bass appears to actually be the same, is it possible that the trebles are harsher with the OEM, drowning out the bass, and that’s why the bass seems inferior to so many of us?
However, my analysis does not dispute the other theory that just the simple act of disconnecting the penthouse and resetting the car may reset the rear amplifier and fix the poor bass response that many of us noted right after we took ownership.