Thanx so much!
Was the audio better, I saw it has more eq setting choices. With the stock Pioneer AVIC-X940BT the bass on songs is either vibrating the car or I need to reduce it (via loudness and EQ) so that certain songs sound decent. I have an Android phone so I'm looking to that support
And how is the phone mic (does that need to be different, i.e. place somewhere else)? The stock Pioneer AVIC-X940BT is terrible. Most can't understand me when I answer calls
I'm only thinking about changing out the head unit, but speakers might be next
The stock sound profile on my W8400NEX was in the Powerful EQ setting and had the HPF for the sub On with a default cut off curve. This default setting sounded much better than the X940BT even after trying to get the 940 to sound good. Could I get better audio if I play around with it more? Yes, but out of the box it already sounds worlds better. One problem my 940 was causing was all treble was going through the sub and made it sound like there was a loose penny rattling around in the back seat at higher volumes. I even went looking for something loose. Turns out the 940 has a bad filter, even when on. The 8400 had a lot more customizability for adjusting the filter and for changing the EQ. The sub is now very powerful without the sub being turned up (still at 0 in the menu) and loudness is turned off; so I could crank up the sub and all the speakers a lot more if I wanted.
The sound quality seems much better to me, but that might be due to all the sound issues I was having with my sub. There used to be almost no bass and when I would force the sub volume up, all Iíd get is a rattle. Now the sub fills in the lower register, giving a more rich experience. With the 940, iPod songs sounded grainy and that would be putting it nicely. With the 8400, Iíve found the songs to be much smoother and not nearly as static filled as they were. However, when playing the same song through Apple CarPlay and then from a CD, the CD will win in quality every time. The 8400 sounds much better than the 940 from a digital device, but neither are perfect if youíre picky.
The mic in your car is the same mic that comes with the new HU. Iíve seen some people install the new mic above the steering wheel column, below the gauge cluster, but I didnít like the look of it. Placing a mic there would give you much better call quality though, and this HU swap would be the perfect time to change the position. I made only one call with the 940 over the course of 5 years and I was told it sounded like crap; this was while driving down the highway. Iíve made one call with the 8400 while parked in my garage and the person on the other end didnít know I didnít have my phone to my face. I didnít have the engine running when testing the 8400, but I did point the stock mic more at my face to get better pick up. You can always leave the old mic in place and add the new one to above the wheel, then test drive which position sounds better on calls. You just have to unplug and plug the 2.5mm headphone jack in the back of the unit to swap between them.
I only did the HU for now and the sound is much better from that alone, much more of a full sound. Changing speakers would help and sealing the sub would do wonders, but thatís more effort than Iím willing to put in for now. You can always swap those out later once you hear the difference the HU makes.