2025 Sportage with Harmon Kardon stereo has very poor (almost non-existent) base performance when using the FM radio. OK when using Apple Car playas the music source. But, OK performance is only from front and mid range speakers. Rear (trunk mounted) sub-woofer produces almost nothing, certainly no base sound, regardless of music source. When bringing this to the attention of the dealership, they said everything was to spec. They even demonstrated the same (poor) performance is 2 other new vehicles on the lot. If this is "NORMAL" for this vehicle and this stereo system, I believe a recall is in order. It is my speculation that KIA got a bunch of poor performing equipment, failed to catch it at the factory, and is currently unwilling to admit they shipped a lot of cars with this defective equipment. Time and Law suits will hopefully get this corrected. in the mean time I have to put up with poor (really poor) stereo performance
