Pioneer TS-A1681F 6.5" 4-Way Coaxial Speakers

The Pioneer TS-A1681F is a pair of 6.5-inch, 4-way coaxial car speakers designed for replacing compatible factory speakers. Its all-in-one coaxial layout combines a woofer, midrange, tweeter, and super tweeter in each speaker. This makes it a practical option for drivers seeking fuller frequency coverage from a factory-style speaker location.

With 80 watts RMS continuous power handling and 350 watts maximum music power, the TS-A1681F is suited to systems using a factory radio or an appropriately matched aftermarket amplifier. Its 4-ohm nominal impedance is common for aftermarket car-speaker installations. A 91 dB sensitivity rating helps it produce useful output without requiring unusually high input power.

Pioneer rates the TS-A1681F for a 35 Hz to 29 kHz frequency response at -20 dB. The 6.5-inch carbon- and mica-reinforced IMPP woofer is intended to provide responsive low-frequency performance, while the PEI midrange and PET dome high-frequency drivers handle upper frequencies. The result is a full-range coaxial design that can cover bass, midrange, treble, and upper-treble duties from one mounting position.

The speaker uses Pioneer's Open & Smooth sound concept, which is designed for smooth response and broad dispersion in off-axis vehicle listening positions. An optimized symmetrical motor design with a large magnet supports the woofer assembly. These engineering elements are intended to suit the challenging acoustics of door, rear-deck, and other factory speaker locations.

Pioneer includes Multi-Fit adapters to expand mounting flexibility in compatible vehicles. The speakers have a 5-5/8-inch cutout requirement and a 2-3/8-inch mounting depth, so vehicle-specific clearance should be verified before installation. They can serve as a straightforward full-range upgrade in a stock system or as part of a larger system built around an aftermarket receiver or amplifier.

Key Features

• 4-Way Coaxial System: Combines woofer, midrange, tweeter, and super tweeter drivers.
• 80W RMS Handling: Supports continuous power handling of 80 watts.
• 350W Maximum Power: Provides 350 watts maximum music power handling.
• Carbon-Mica IMPP Woofer: Uses a reinforced 6.5-inch polypropylene woofer cone.
• PET Dome High Frequencies: Includes 11 mm tweeter and super tweeter drivers.
• Multi-Fit Adapters: Included adapters broaden mounting options in compatible vehicles.

Design & Installation

The TS-A1681F uses a carbon- and mica-reinforced injection-molded polypropylene woofer cone, an elastic-polymer woofer surround, and a ferrite woofer magnet. Its 42 mm PEI cone midrange is paired with 11 mm PET hard-dome tweeter and super tweeter drivers. Grilles are included to provide a finished appearance where exposed-speaker installation is appropriate.

Confirm the vehicle's available mounting depth, cutout size, mounting-hole pattern, and factory grille clearance before purchase. The speaker requires a 144 mm (5-5/8-inch) cutout and 59 mm (2-3/8-inch) mounting depth. Use the included Multi-Fit adapters where suitable, and connect the speakers to audio equipment designed for 4-ohm speaker loads.