What’s Included

Upgrade your factory sound with the Harman Kardon FIT 3F, a compact 3.5-inch coaxial car speaker pair built for clear detail, smooth highs, and a clean OEM-style fit. Harman Kardon’s FIT Series was launched as a premium in-car speaker range focused on high-fidelity sound and easy integration across different vehicle interiors.
Based on the product images and Harman Kardon FIT Series documentation, the FIT 3F is a 3-1/2" (89mm) coaxial car speaker without grille with 30W RMS power, 240W peak power, 90dB sensitivity (@2.83V), 4-ohm nominal impedance, and an 80Hz–40kHz frequency response.
One of the standout features shown in your images is the Plus One fiberglass woofer cone, which is designed with a larger cone area than many same-size speakers. Harman Kardon materials say this helps improve sensitivity, strengthen low-frequency output, and deliver better overall music performance. Your images also highlight Hi-Res Audio, clarity and detail, and precision craftsmanship, which fits with the FIT Series focus on crisp high frequencies and better in-car listening quality.
Key Features
- 3.5" / 89mm coaxial car speakers
- 30W RMS / 240W peak
- 90dB sensitivity
- 4Ω impedance
- 80Hz–40kHz frequency response
- Plus One fiberglass woofer cone
- Hi-Res Audio performance
- Compact design for factory speaker upgrade applications
Specifications
Brand: Harman Kardon
Model: FIT 3F
Speaker Type: 3.5" Coaxial Car Speaker
Size: 3-1/2" (89mm)
Rated Power: 30W RMS
Peak Power: 240W
Sensitivity: 90dB (@2.83V)
Impedance: 4Ω
Frequency Response: 80Hz–40kHz
Design: Grilleless coaxial speaker
Why Choose the FIT 3F?
The FIT 3F is a great option for drivers who want to improve detail and clarity in smaller factory speaker locations without moving to a more complex custom setup. Its compact size makes it suitable for dash or small factory mounting positions, while the wide frequency response and coaxial design help deliver a more refined sound than many stock speakers. The broader FIT Series is also positioned as a seamless upgrade line for drivers who want premium sound in a practical format.