JBL STAGE36427AM 4" x 6" Two-Way Coaxial Speakers

The JBL STAGE36427AM Stage3 6427 is a pair of 4" x 6" two-way coaxial car speakers designed for replacing compatible factory speakers. It is suited to vehicles with oval 4" x 6" speaker locations where clearer, more capable sound is desired from a compact factory-size format. Each speaker combines a woofer and centrally mounted tweeter in one assembly for a straightforward full-range upgrade.

With 35 watts RMS power handling per speaker and 91dB sensitivity at 2.83V/1m, these speakers are intended to work with a factory radio or a suitably matched aftermarket amplifier. Their 3-ohm nominal impedance is designed to draw effectively on available power from compatible car-audio electronics. The rated 75Hz to 20kHz frequency response supports midrange, treble, and upper-bass duties in a vehicle system.

JBL's Plus One polypropylene woofer cone architecture moves the cone attachment point outward to increase usable cone area. More cone area can help a compact oval speaker move more air than a conventional design with the same frame size. This makes the Stage3 6427 a practical option for factory-replacement locations that have limited space.

The Stage3 6427 uses an edge-driven dome tweeter to reproduce higher-frequency detail. Its two-way coaxial layout places the tweeter with the woofer, helping simplify installation where separate tweeter locations are not available. JBL also specifies a 6kHz crossover point for the speaker assembly.

A rigid vented basket frame is designed to promote voice-coil cooling as the speaker operates. The compact 4" x 6" format can fit many factory oval speaker positions, but vehicle-specific opening dimensions, mounting depth, mounting points, and connector style should be checked before purchase. Use the pair as a direct speaker replacement or as part of a wider system upgrade with compatible front, rear, or amplified channels.

Key Features

• 4" x 6" Coaxial Format: Combines woofer and tweeter functions in each compact oval speaker.
• Two-Way Design: Separates low and high frequency duties within one speaker assembly.
• Plus One Woofer Cone: Uses increased cone area to support efficient output.
• Polypropylene Woofer: Provides a lightweight cone material for everyday car-audio use.
• Edge-Driven Dome Tweeter: Handles high-frequency reproduction in the coaxial assembly.
• Vented Basket Frame: Helps promote airflow around the voice-coil and motor area.

Design & Installation

The Stage3 6427 uses a black oval frame, polypropylene woofer cone, integrated dome tweeter, and vented basket construction. Its stated outer dimensions are approximately 157.0mm by 99.5mm, with an overall depth of approximately 52.1mm. The speaker is engineered as a 4" x 6" two-way coaxial replacement design.

Confirm that the vehicle accepts 4" x 6" speakers and verify clearance behind the mounting surface before installation. JBL lists two speakers in the box; check whether your vehicle requires separate mounting adapters, screws, speed clips, or wiring harness adapters. For amplified systems, use an amplifier channel rated to operate with a 3-ohm speaker load and match power using the 35W RMS rating per speaker.