JBL Stage3 427F – 4 inch (100mm) 2-Way coaxial car speakers | 150 Watts

JBL Stage3 427F – 4 inch (100 mm) coaxial car speakers – 150 Watts

JBL Stage3 speakers bring patented technologies, world-class engineering and JBL pro sound heritage together to create a powerful line of car audio loudspeakers. Focusing on performance and fitment, they bring unrivaled sound performance to your vehicle. The high output 2 ohm DCR design extracts every watt of power from the amplifier or head unit enabling the patented Plus One™ woofers to deliver high output and solid deep bass performance. Their rigorous OEM-level reliability testing provides peace of mind when it's time to crank it up for that inimitable JBL adrenalin surge.

The JBL Stage3 427F 4″ coaxial car speakers offer powerful, clear sound with a Plus One™ woofer and edge-driven dome tweeter, delivering rich bass and crisp highs. With 300W peak power and a shallow 46.8 mm mounting depth, they’re ideal for upgrading factory audio systems. Rugged construction ensures lasting performance, and they install easily into most vehicles.

For a perfect fit and hassle-free setup, pair them with an Incartec speaker fitting kit to achieve a clean, professional finish.

Superior Sound Quality

The JBL Stage3 427F 4″ (100 mm) 2‑way coaxial speakers blend a Plus One™ polypropylene woofer with an edge‑driven dome tweeter to deliver bold lows, clear mids, and crisp highs spanning 75 Hz–20 kHz. With a high-output 2‑ohm DCR design, these JBL car speakers extract every watt from your source, making them ideal for car audio enthusiasts seeking powerful factory upgrades.

Durable Construction for Long-Lasting Performance

Built to withstand temperature extremes, UV exposure, and road vibration, these speakers feature rugged polypropylene cones, rubber surrounds, and a vented basket to keep the voice coils cool under pressure. JBL's OEM-grade testing ensures years of reliable performance.

Easy Installation

Designed for simple, clean upgrades, the Stage3 427F drops into standard 4″ openings using a 1.84″ (46.7 mm) mounting depth. With no grille included, the installation suits flush factory lines, and the included screws and clips make setup seamless.

Why Choose JBL Stage3 427F?

Part of JBL’s trusted Stage Series, the 427F delivers true JBL performance at an accessible price. Whether upgrading OEM speakers or boosting an entry-level system, these 4″ coaxials deliver a rich, immersive audio experience without extra wiring or crossovers.

Specifications:

• Type: 2‑Way Coaxial
• Woofer Size: 4″ (100 mm)
• Peak Power (per pair): 300 W (150 W each)
• RMS Power (per pair): 60 W (30 W each)
• Sensitivity: 90 dB
• Frequency Response: 75–20,000 Hz
• Impedance: 3 Ω
• Mounting Depth: 1.84″ (46.7 mm); Cutout: 3.63″ (92.1 mm)

What's in the box?:

• 2 × JBL Stage3 427F 4″ coaxial speakers
• Mounting Screws
• User Manual

Sold as a pair.

Are 10cm/ 4 inch speakers good for my vehicle?

4-inch or 10cm speakers are a compact audio solution that delivers impressive sound quality in a small package. Ideal replacements in popular smaller 3-door cars like the Vauxhall Corsa D and select Alfa Romeo, Fiat, and BMW, these lightweight speakers can easily be installed in rear doors, ensuring an unobtrusive fit. Despite their size, they produce powerful and immersive audio, making them perfect for music lovers who seek clarity without the bulk of larger equipment. Whether you're upgrading your vehicle's sound system or simply looking to reduce the size of your car audio set up, 4-inch speakers provide a remarkable audio experience that doesn’t compromise on performance.

What size speakers are in my car? 

If your unsure what speakers fit your car we would recommend using our market-leading Search By Car feature