Infinity Alpha 603M coaxial speaker 165mm 60 480W 90dB 55Hz–20kHz 4ohm

Infinity Alpha 603M — 165mm Three-Way Speaker

In car audio, every detail counts. The Infinity Alpha 603M speakers, with a diameter of 165mm and patented Plus One technology, deliver exceptional sound performance thanks to a larger woofer diaphragm area. This ensures higher sensitivity and stronger output in the from 55 Hz band, which will satisfy both lovers of deep bass and clear midrange tones. The tweeter with PEI balanced dome extends the experience up to 20 kHz, without distortion even at higher volumes. Thanks to the combination of 60 W RMS rated power, 90 dB sensitivity and 4 Ω impedance, these speakers are compatible with most factory and aftermarket systems.

Exceptional sound quality with Plus One technology

Plus One technology, exclusive to Infinity speakers, gives the woofer a larger diaphragm area than is typical for models of the same size. This means solid and rich bass that excels from 55 Hz, ideal for dynamic music and dramatic sound effects. The polypropylene diaphragm contributes to the durability and consistency of the sound in any environment.

High frequency clarity and optimized sensitivity

The tweeter with PEI balanced dome guarantees a clear and natural high-frequency response up to 20 kHz, which you will appreciate at higher volume levels without distortion. With 90 dB sensitivity, the speakers can create a sufficiently loud output even with less powerful amplifiers, which is especially advantageous when used with factory car stereos.

Reliability and easy installation

The Infinity Alpha 603M speakers have been thoroughly tested for environmental resistance and reliability in long-term operation. Their design allows for easy installation in a wide range of vehicles - from compact cars to larger trucks. With 4 Ω impedance they are designed to be compatible with most common audio systems.

Technical data

• Speaker diameter: 165 mm (6.5")
• Power: 60 W RMS, 480 W max.
• Frequency range: 55 Hz - 20 kHz
• Sensitivity: 90 dB at 2.83 V
• Impedance: 4 Ω
• Woofer: Plus One polypropylene diaphragm
• Tweeter: PEI balanced dome

Package contents

• 2 speakers
• 2 cover grilles
• 8 screws
• 8 flat connectors
• 2 foam gaskets
• Quick start guide