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Hi all I am on Elantra AD 2018, and have had Nakamichi NBF618S sub, JBL speakers (front 2 only; back 2 is stock) for 2-3 years. Yesterday I changed my Stock HU to Pioneer Z9250BT. I have some observations below... hope experts here can help share your views/ explanation! 🙏🙂 1. Whereas previously volume on stock HU needs to be around 15-16 for a good (but not loud) listening experience, it is quite loud around 8-9 now... while I can pick up more background vocals and instruments in the music, I get ear fatigue more easily. I could further dial down the volume to reduce fatigue but if the volume is soft it seems to be a waste of the sub/ speaker/ pioneer HU setup since there is not really enjoyment in listening to v soft music. Is there anything I can do to enjoy the music and the increased clarity but yet reduce the ear fatigue? A little embarrassing to say, but slightly miss the old HU where it gave reasonable loudness without fatigue (although vocals and instruments were not as clear). 2. Is there any way to "turn off" EQ? In stock HU it was possible to turn off EQ and listen to music/ vocals in the "original" way, but in this HU seems I have to choose one of the pre-set settings [e.g. Natural, Vocal, Super Bass, etc]. I am slightly reluctant to choose any preset EQ, because it means that when I switch between say, pop and classical music, I will need to remember to change the EQ to another appropriate pre-set choice. Hence normally for any music player I will "turn off" EQ. 3. For "SPEAKER LEVEL" audio setting, the front 2 speakers are set at 4 dB, back 2 speakers are at 0 dB, while sub is at 6 dB. Do you know if this is the default factory setting, or was it "tuned" by the workshop? What is the default factory setting? What is the impact if I change the 2 speakers and sub to 0 dB? Will it cause audio quality to deteriorate? Thanks guys 🙏🙏🙏

Anyone had issue with gps? Connected to AA. Sometimes after driving a while, abt the 20min mark, HU map will lose its GPS and go crazy. Same for both waze and Google map. If I unplug and use my phone map, it works fine with correct location. Plug back to AA, Hu go crazy with location again. Fix: Restart phone n connect back doesn't help. Restart car will help. But driving half way I also can't find a place to restart my car. Abit hard to demo this to shop i buy from, unless I wait for HU gps to go crazy then quickly drive down to show them.