Stage One BMW Speaker Upgrade for F06/F10 Gran Coupe/Sedan with Harman Kardon 2017 your amplifier is like a

your amplifier is like a 200hp motor in a 4

OEM Quality: Yes (Injection molded with glass fiber to same specs as BMW connector)

impedance and efficiency-optimized improvement of the factory BMW woofers

Stage 2 Racegas: 33%HP / 45%TQ

Visit their site for custom tuning and RE|FLEX packages

Stage One BMW Speaker Upgrade for F06/F10 Gran Coupe/Sedan with Harman Kardon 2017 your amplifier is like aGET UNBELIEVABLE, CRYSTAL CLEAR SOUND. JUST BY REPLACING YOUR BMW'S SPEAKERS We took your factory BMW speakers and re engineered our upgrade for one thing: clarity. So you can simply swap your original speakers for ours without changing anything else in your audio system, and the result is smooth, natural, yet unbelievably detailed reproduction of your favorite music. PLAY YOUR MUSIC LOUDER. AND ENJOY EVERY NOTE: We engineered the Stage One speakers