Just recently I installed a pair of Hella Supertones on my Jeep and noticed that over the past few days the sound has weakened. My horns' sound is mostly high pitched compared to all the videos on youtube which have a distinctive high/low sound and appear to be much deeper and louder.
You can hear the distinct difference in tone from the two videos I posted. Wondering if I should just return them to amazon for another set or if it's a loose connection or something. Also I should note that I did not use the supplied relay switch they provided in the package, could that be a cause?