JBL Stage3 427F – 4" (10 cm) 2-Way Coaxial Speakers, Factory Upgrade (No Grilles)

Compact size, big JBL energy. Stage3 427F brings patented Plus One™ cone technology and JBL’s reliability to tight 4" locations, making it an ideal factory-fit upgrade. The 3 Ω nominal (2 Ω DCR) high-output design pulls more power from your head unit or small amp, while the polypropylene woofer and wide-band HF driver keep vocals clean and detailed. Rated 30 W RMS / 150 W peak with 90 dB sensitivity, these speakers deliver a noticeable lift over tired OEM drivers without complicated install work. Order now and enjoy crisp, dynamic sound on every drive.

Key features

• 4" (10 cm) 2-way coaxial factory-upgrade speakers

• Plus One™ polypropylene woofer for stronger mid-bass and efficiency

• High sensitivity (90 dB) for great results on factory power

• 3 Ω nominal impedance to maximize output from stock head units

• Engineered for broad fitment in common 4" OEM locations

• Grilles not included

Technical specifications

• Power handling (RMS): 30 W

• Power handling (Peak): 150 W

• Sensitivity (@2.83 V/1 m): 90 dB

• Frequency response: 75 Hz – 20 kHz

• Impedance: 3 Ω

• Pair/Single: Pair

• Grilles: Not included

What’s in the box

• 2 × Speakers (pair)

• Mounting screws & speed clips

• Contents may vary by batch/region; use vehicle-specific fasteners where required.

Fitment notes

• Fits most 4" OEM dash/door openings; confirm cutout & mounting depth

• Plays well from factory head units; a compact amp adds extra headroom

• Ideal for direct OEM replacement where separate grilles aren’t needed