Description

Pioneer TS‑A878

The Pioneer TS‑A878 is a 3.5‑inch (≈8.9 cm) 2‑way coaxial speaker pair, designed primarily for custom‑fit or compact vehicle speaker locations where full‑size units won’t fit. It features a carbon and graphite reinforced IMPP™ woofer cone along with a 26 mm polyetherimide (PEI) hard‑dome tweeter, giving it a frequency response of approximately 60 Hz to 28 kHz and a sensitivity around 88 dB. It is rated for up to 60 W peak power and about 15 W RMS (nominal), with an impedance of 4 ohms.

Specifications

Product Performance

Specification	Value
Continuous Power Handling (RMS)	15 W
Maximum Peak Power Handling	60 W
Nominal Impedance	4 Ω
Sensitivity (1W/1m)	88 dB
Frequency Response	60 Hz – 28 kHz
System Type	Coaxial 2-way, Dome Tweeter

Features

Specification	Value
Cut Out Dimensions	3″
Mounting Depth	1-3/8″ / 34.9 mm
Tweeter Dimensions	0.98″
Woofer Dimensions	2.75″

Materials

Specification	Value
Basket Material	Resin
Cone Material	IMPP-Carbon Graphite Blended
Damper	Aramid Fiber
Diaphragm Material	Polyetherimide (PEI) – Midrange
Magnet Material	Ferrite – Woofer, Neodymium – Midrange
Magnet Weight	4.5 oz – Woofer, 0.1 oz – Midrange
Surround Material	Rubber
Surround Type	Rolled
Voice Coil Material	Glass Cloth
Voice Coil Wire	Copper
Wire Terminals	Lug Type

About The Product

3-1/2-inch Custom-Fit Two-Ways

These speakers deliver a maximum power handling of 60 W. They feature a composite IMPP™ cone providing the strength and rigidity required for powerful bass, and a one-inch PEI dome tweeter for smooth and accurate highs. The custom-fit basket is designed to fit GM, Ford, and Volkswagen vehicles.

A Series

The highly efficient design of the Pioneer A Series speakers intentionally matches the subwoofer and full-range loudspeakers to provide seamless and smooth sound characteristics. The dynamic, high-impact bass lets you hear and feel the music. Pioneer’s OPEN & SMOOTH sound concept ensures a seamless transition between midrange and tweeter drivers, delivering a uniform off-axis frequency response optimized for automotive applications, where one or more speakers may be aimed away from the listener’s ears. The A Series lineup enhances audio details and improves acoustic performance.

Loud & Clear

These speakers are as efficient—or even more efficient—than typical stock car speakers. They deliver coherent sound without exaggerated response, improving precision and detail across the entire audio bandwidth. Their high efficiency allows excellent sound from low-power sources, while their high power handling lets you connect them to an external amplifier for enhanced performance.

Open & Smooth

Pioneer’s OPEN & SMOOTH sound concept ensures a seamless transition between the midrange and tweeter drivers, delivering a uniform off-axis frequency response. This design is optimized for automotive applications where speakers may not be directly aimed at the listener’s ears.

Carbon and Graphite Reinforced IMPP™ Cone

An extremely rigid yet lightweight cone prevents distortion and failure under high power. Pioneer’s IMPP™ composite cones are curvilinear, with varying thicknesses for a balance between lightness (responsiveness) and rigidity (precise audio and tight bass). Advanced integration of carbon and graphite further improves the rigidity-to-weight ratio, creating a perfectly balanced cone across the entire audio bandwidth.

Polyetherimide (PEI) Hard Dome Tweeter

The PEI dome can withstand high temperatures while maintaining stable electrical and mechanical properties across a wide frequency range. Its strength-to-weight ratio makes it ideal for high-frequency vibrations and thermal management of the voice coil. A carefully designed front diffuser helps maintain audio balance during transitions from on-axis to off-axis listening, providing a more balanced sound throughout the car.