Posted this on Reddit as well. Just getting a bunch of people's opinions before I spend 12 hours trying to figure it out.
https://youtu.be/K4pVAhrrjyEI had my system installed by an audio shop recommended by several friends. Everything went great until I noticed two different buzzing noises coming from the tweeter installed in on top of the driver side dash (where the stock tweeter was originally). The buzzing noises only happen when I start driving. One increases in frequency while I'm accelerating and the other one sounds like its a sound test. It will increase in frequency every 2 seconds for about 5 times and then decrease in frequency every 2 seconds. This usually is triggered when I slow down.
The audio shop troubleshooted the issue for about 8 hours and couldn't figure out the issue (ya what a joke, you would think people who do this every day can troubleshoot any speaker issues). I disconnected the M-75.4 amp and powered the speakers/tweeters to the head unit thinking it was a bad amp causing the buzz but that didn't work. I swapped the tweeters thinking it was a bad tweeter and the issue still prevailed. That narrows it down to possibly being the crossover causing the issue. I called Crutchfield and they sent me out another set of crossovers + speakers to see if that is indeed the issue.
When I was taking apart the head unit and door panels, I noticed the audio shop did not place the crossovers behind the door panel or head unit. I'm assuming it's mounted somewhere behind the front dash of my 2016 Colorado Crew Cab Z71.
Before I spend a couple hours on taking the front dash off, do you think the issue is the crossover or should I try something else first? The M-75.4 is still disconnected.
Amps: Twisted Sounds 600 and CT Sounds M-75.4 Speakers: Morel Maximo 6 Sub: JL Audio 10TW3-D4