HARMAN KARDON FIT 4SFL - Fit Series 4" Component Car Midrange Speakers for BMW/Mini (Plug & Play)

Pure Aftermarket 4inch Plug and Play Midrange Speakers For BMW/Mini by Harman Kardon

The Harman Kardon Fit 4SFL is a dedicated 4-inch midrange speaker, developed as part of Harman’s 2025 Fit Series—a lineup of high-performance car audio components made to meet the demands of premium factory and aftermarket audio systems. Designed with no grille, the 4SFL is tailored for OEM integration, particularly in BMW and MINI vehicles equipped with Harman Kardon sound systems.

Dedicated Midrange Design

The 4SFL is not a coaxial or full-range driver. It is purpose-built to reproduce critical midrange frequencies (200 Hz – 8 kHz) with outstanding clarity and smooth response.

Plus One™ Glass Fiber Cone

Uses Harman’s patented Plus One™ cone architecture, featuring a larger surface area for improved efficiency and frequency response. The rigid glass fiber material ensures clean and controlled sound, especially in vocals and instrumentation.

High-Resolution Certified Performance

Supports high-resolution playback when paired in a multi-driver system. Though the 4SFL itself does not extend into tweeter or bass territory, its fast transient response and low distortion make it an ideal component in Hi-Res certified speaker setups.

Factory-System Ready

Designed for drop-in replacement in OEM audio systems—especially BMW and MINI models with 4″ door or dashboard midrange cutouts. It matches 4-ohm impedance, uses factory-aligned mounting points, and supports Harman Kardon’s plug-in crossover systems

The Fit 4SFL is ideal for:

BMW F-series, G-series and (select E-series) vehicles

MINI Cooper (F55, F56, F57) models

Drop-in midrange upgrade for door, dash rear deck surround speakers

Works seamlessly with Harman Kardon factory amplifiers.

Specification Detail:-

Speaker Type

Midrange (No grille)

Size : 4″ (100 mm)

Power Handling (RMS) : 45 W

Peak Power : 360 W

Frequency Response : 200 Hz – 8 kHz

Sensitivity (@2.83V) : 90 dB

Impedance : 4 ohms

Cone Material : Plus One™ Glass Fiber

Hi-Res Audio Certified : Yes (when used in full system)