Infinity Alpha 403F coaxial speaker 100mm 40 320W 88dB 80Hz–20kHz 4ohm

Infinity Alpha 403F — coaxial car speakers

In the automotive environment, where sound quality is often limited, the Infinity Alpha 403F brings you clarity and performance that even demanding listeners will appreciate. These 100mm coaxial speakers boast 40W RMS power and 88dB sensitivity, ensuring sufficient volume and detailed reproduction even with lower car radio power. The 80Hz - 20kHz frequency range covers the entire audible spectrum, from deep bass to sharp treble, and thanks to nominal impedance of 4Ω they are compatible with both conventional car radios and external amplifiers.

Advanced audio technologies for an excellent audio experience

The patented Plus One diaphragm provides a larger surface area, which increases sensitivity and improves low frequency output. The polypropylene woofer creates a solid foundation for the bass and midrange, while the PEI dome tweeter delivers clean and clear highs without distortion even at higher volumes. This combination ensures a balanced and detailed sound image.

Durability and Easy Installation

The Infinity Alpha 403F has been designed for easy installation in a wide range of vehicles, including passenger cars, compact models and trucks. They have undergone rigorous reliability tests and resistance to temperature fluctuations, humidity and vibration, ensuring long-term and trouble-free operation in the automotive environment.

Technical data

• Frequency response: 80 Hz - 20 kHz
• Power handling: 40 W RMS / 320 W max.
• Sensitivity: 88 dB at 2.83 V
• Nominal impedance: 4 Ω
• Woofer cone: Polypropylene, Plus One architecture
• Tweeter: PEI balanced dome

Package contents

• 2× speaker
• 8× screw
• 8× flat connector
• Quick start guide