When I first drove my 2024 BMW i5 eDrive40, I was thrilled with its design, performance, and technology. However, one glaring shortcoming was the Harman Kardon Premium Sound System. Don’t get me wrong—it’s a decent system, but BMW made a significant compromise by moving the subwoofers from under the seats to the front doors to accommodate the EV batteries. The result? The low-end bass was severely lacking, leaving the listening experience hollow, especially for someone like me who enjoys a well-rounded sound profile.
After a couple of months of tolerating the stock system, I upgraded it. I brought my car to Mobile Dynamics in Bradenton, Florida, for their expertise in custom audio solutions. They guided me through selecting the right components and designing a setup to deliver my desired sound. I opted for a setup featuring components from Hertz, known for its high-quality audio performance. This upgrade significantly enhanced the bass, elevating the sound experience.
The Solution
After exploring my options, I landed on Hertz audio components that included:
- Hertz MPBX 250 S2 Subwoofer: A sealed 10-inch subwoofer enclosure installed in the trunk to deliver rich, deep bass.
- Hertz HCP 1D Amplifier: A compact yet robust mono-channel amplifier mounted in the trunk’s hidden storage compartment to power the subwoofer.
- Hertz HRC Remote Control: This remote bass control knob was seamlessly integrated into the center console, allowing me to adjust the bass level on the fly without having to fumble with settings in the trunk.
This combination fulfilled my need for enhanced low-end sound.
The Installation Process
The installation was carried out with care and attention to detail to ensure the car’s modern and minimalist interior remained intact. The subwoofer was installed in the trunk, a logical choice given the i5’s lack of under-seat space. To keep the setup clean and functional, the amplifier was mounted in the trunk’s storage compartment, and the remote control was integrated into the center console for easy access.
Every component was installed seamlessly, with expertly concealed wiring to maintain the car’s clean aesthetic. They also took the time to fine-tune the system, calibrating it for optimal performance.
The Results
The difference was night and day. The Hertz MPBX 250 S2 sub brought a level of bass that the stock system simply couldn’t achieve. Tracks that once felt flat now have a depth and fullness that’s incredibly satisfying. The HCP 1D amp ensures the subwoofer delivers clean and powerful performance without distortion, even at higher volumes. The HRC remote control makes it easy to adjust the bass depending on the type of music I’m listening to or whether my family is in the car.
This upgrade transformed the way I experience music in my i5. From the deep notes of bass-heavy tracks to the subtle low-end details in acoustic songs, the system now delivers a balanced, immersive audio experience that’s a joy to listen to.
Final Thoughts
Upgrading the sound system in my i5 with a Hertz MPBX 250 S2 subwoofer, HCP 1D amplifier, and HRC remote control was a no-brainer. It addressed the stock system’s shortcomings and elevated the overall driving experience.
For fellow BMW i5 owners who find the stock Harman Kardon system lacking, don’t settle for mediocrity. With the right components and a professional installation, you can achieve a sound system that matches the quality of your car. Be sure to find a solid local installer who can ensure the installation is seamless, tailored to your preferences, and executed with attention to detail, making the entire process seamless.