The Harman Kardon FIT 4F is a premium 4-inch (100mm) 2-way coaxial car speaker from Harman Kardon’s Fit Series. Designed specifically for drop-in, invisible OEM upgrades, it comes without protective grilles so it can fit cleanly behind original factory speaker locations—such as dash corners, center channels, or rear fill panels.
| Parameter | Specification |
| Speaker Type | 4" (100mm) 2-Way Coaxial (Grille-Less) |
| Power Handling | 30W RMS / 240W Peak |
| Frequency Response | 70 Hz – 40,000 Hz (Hi-Res Audio Certified) |
| Sensitivity (@2.83V/1m) | 90 dB |
| Nominal Impedance | 4 Ohms |
| Crossover Point | 8,100 Hz |
Plus One™ Glass Fiber Woofer Cone: Uses HK's patented cone geometry to provide greater surface area than standard 4-inch drivers, yielding punchier mid-bass and higher overall sensitivity.
Edge-Driven Textile Tweeter: Integrated centrally into the speaker, reaching up to 40 kHz for crisp, high-resolution treble without harsh sibilance.
Uni-Pivot & Level Control: Features a swiveling tweeter mechanism (rotatable up to 270°) and an integrated output switch (0 dB / -3 dB) to fine-tune high-frequency intensity based on speaker placement.
Slim Inline Crossovers: Included pre-wired slim crossovers make cable routing easy in cramped vehicle dash/door cavities.
OEM Upgrade Ideal: Delivers a noticeable jump in clarity over factory paper-cone 4" speakers without needing complex wiring runs or custom fiberglass pods.
