Infinity Alpha 603M

The Infinity Alpha 603M car speakers offer a three-way coaxial solution to upgrade your vehicle's sound system. They use the patented Plus One cone architecture, which increases sensitivity and enhances bass response. With a continuous power handling of 60W RMS and a peak power of 480W, they deliver clear and dynamic sound. Their design ensures easy installation in a wide range of vehicles, from cars to lorries.

Patented Plus One cone

The sound is built around a woofer with a polypropylene cone that uses the patented Plus One architecture. This technology provides a larger overall cone area compared to conventional speakers of the same size. The result is higher sensitivity and a noticeably stronger output at low and mid-range frequencies. This gives the sound a solid foundation in the bass range, which starts at just 55Hz, while maintaining clarity.

Clear highs and balanced sound

The three-way design delivers a balanced reproduction across the entire frequency spectrum. Clear high frequencies are handled by a tweeter with a PEI balanced dome, which reproduces tones up to 20kHz. This ensures the sound remains distortion-free even at higher volume levels. In addition, each speaker has been individually tuned to provide the consistent sound signature typical of the Infinity brand.

Reliability and universal use

Infinity Alpha 603M speakers are designed for easy installation. The nominal 4-ohm impedance is compatible with most factory-fitted and aftermarket car stereos. Each unit has undergone rigorous reliability and durability testing against environmental factors such as temperature changes and vibrations. This means you can count on their performance in cars, compact vehicles, and lorries.