After reading lower star reviews and complaints of low sound and not loud enough, I felt the need to weigh everything. I bought 2 of these speakers, one for my wife and one for me. I bought the first one for my wife as a Christmas present for her Murano as the factory horn wasn't very loud. I hooked it up along with the factory horns (to keep the sound when the remote is used to lock and unlock the car). All 3 horns (2 Factory and Vol) work together without any problems. All I had to do was replace the 15 amp horn fuse with a 20 amp fuse and I was done. After hearing this several times, I realized I needed this for my car. I commute to work 5 days a week, 25 miles each way to and from work. I've had many mishaps with people who can't drive, shouldn't drive, don't pay attention to blind spots, and tend to either signal a lane change or just drift off with no signal. That was enough to buy a DVR (that's a review for another time) as well as a louder horn. I installed the same on my Impala along with the factory GM horns and got the same results. Nice and loud, noticeable to idiotic drivers. This horn has done more than necessary to prevent accidents. Replaced the 15 amp horn fuse with a 20 amp fuse and no problem. I'm not sure if the other reviews have a defective product, they aren't as smart as they thought they plugged it in, or just wanted to be important to show off their well tuned ears when listening to the audio frequency being produced describe. This horn is by no means as loud as a slide horn or dedicated air horn found on really big rigs, but it's loud enough when properly adjusted and produces a nice, deep, authoritative tone. I highly recommend this product. I also recommend getting it installed with someone who knows what it does, lest you create a bunch of whiny low-star reviews because you didn't install it properly.
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