Pioneer TS-A1371F 5.25" 3-Way Coaxial Speakers

The Pioneer TS-A1371F is a pair of 5.25-inch, 3-way coaxial car speakers designed for upgrading worn or limited factory speakers. Its compact format suits vehicles that use a 5.25-inch speaker location, subject to checking the mounting depth and cutout requirements. With a 4-ohm nominal impedance, these speakers are intended for standard automotive audio systems.

This A-Series model combines a woofer, midrange, and tweeter in each speaker to cover bass, vocal, and treble ranges from one mounting location. The 5.25-inch woofer uses a carbon- and mica-reinforced IMPP cone, while a cellulose-fiber midrange and PET hard-dome tweeter handle upper frequencies. This coaxial arrangement provides a practical way to add more defined frequency coverage without separate component-speaker placement.

Rated for 50 watts nominal power handling and 300 watts maximum power, the TS-A1371F is suited to systems that are matched appropriately for its 4-ohm load. Pioneer specifies a 44 Hz to 52 kHz frequency response and 89 dB sensitivity at 1W/1m. Those specifications make it a sensible option for everyday music listening from a factory or aftermarket head unit, or an appropriately matched amplifier.

Pioneer's Open & Smooth sound concept is part of the A-Series design, focusing on broad sound dispersion for listening positions that are not directly in front of the speakers. The carbon- and mica-reinforced IMPP woofer cone is paired with a ferrite magnet structure. Together with the dedicated midrange and tweeter elements, the design is intended to maintain clear reproduction across the speaker's rated range.

The TS-A1371F can be used as a direct-size replacement where vehicle dimensions allow, or as part of a staged system upgrade with an aftermarket receiver or amplifier. Its 4.75-inch cutout requirement and 2.125-inch mounting depth should be compared with the vehicle's speaker opening before purchase. Speaker grilles are included for installations where the mounting location does not already provide protection.

Key Features

• 3-Way Coaxial Design: Integrates woofer, midrange, and tweeter elements in each speaker.
• 5.25-Inch Woofer: Fits many compact factory speaker locations after fitment verification.
• 50W Nominal Handling: Supports appropriately matched factory or aftermarket audio power.
• Carbon & Mica IMPP Cone: Provides a rigid woofer diaphragm construction for bass reproduction.
• PET Hard-Dome Tweeter: Handles high-frequency detail within the coaxial speaker assembly.
• Open & Smooth Design: Supports broad sound dispersion for off-axis vehicle listening.

Design & Installation

The TS-A1371F uses a carbon- and mica-reinforced injection-molded polypropylene woofer cone, a cellulose-fiber midrange cone, and an 11 mm PET hard-dome tweeter. Pioneer specifies ferrite magnets and an included speaker grille. Each speaker measures 156 mm by 73 mm overall and weighs 0.70 kg.

Verify the vehicle's opening, mounting pattern, and available clearance before installation. The required cutout is 121 mm (4.75 inches), and mounting depth is 54 mm (2.125 inches). Connect the speakers to a compatible 4-ohm car-audio channel, observe polarity, and match amplification to the 50-watt nominal power specification.