VE Series 2 Bluetooth vs iPod connection

[big ole]

bit of a weird one but I'm curious to know why when I play music through an iPhone charger opposed to through Bluetooth the bass is 10x better. I upgraded my fronts to kicker cs650 running off stock iQ headunit and was disappointed when I first installed them because the bass wasn't that good, the bass was maxed in config but only recently I started playing music off my iPhone charger instead off Bluetooth and now the bass is way better. Anyone know why this is I would prefer to use Bluetooth as it's easier but the sound quality doesn't come close to playing off my charger.

 

[Fu Manchu]

Compression.

 

[Fu Manchu]

Also most aftermarket speakers are 4ohm and the factory headunits are 2ohm outputs.

 

[lmoengnr]

Apple and Bluetooth don't play well together...