Hi guys. Just recently installed a pair of Hella Supertones ( the one with red grills on the casing) in my pick up but noticed it to be different sounding compared to my dad's pick up with Hella supertones as well.
My horns' sound is mostly high pitched unlike my dad's which has a distinctive high and low sound in it and of course, it give me the impression of a louder sound.

What could have caused this? Could it be defective? Mine is Made in India, written on its box. I've heard German made ones sound the best. Could this be the reason?