2-way component speaker system Infinity Alpha 603CF 165mm (6.5")

Infinity Alpha 603CF 165mm (6.5") is a 2-way component speaker system designed for in-car audio upgrades. The kit includes dedicated 165 mm woofers and separate tweeters with component-style crossover separation to improve imaging and mid/high frequency clarity compared with typical coaxial factory speakers. The design allows flexible placement of tweeters and crossovers to optimize sound staging and reduce distortion at typical listening levels.

Advantages

The component configuration separates low and high frequency drivers, resulting in clearer midrange and smoother high-frequency response. Separate tweeters deliver improved detail and off-axis dispersion, while the 165 mm woofers provide controlled bass and accurate mid-bass reproduction. The included crossovers enable appropriate frequency division to minimize driver overlap and reduce intermodulation distortion. The system is engineered for direct upgrades of factory speaker locations in many vehicles and supports improved dynamic range and imaging.

Suitable for

• Replacing factory 6.5" coaxial speakers to improve clarity and sound staging
• Custom car audio installations where tweeter placement is optimized separately from woofers
• Users seeking clearer midrange and detailed high frequencies without an external amplifier
• Hands-on audio upgrades in compact and mid-size vehicles

Key specifications

• Driver configuration: 2-way component system with separate woofer and tweeter
• Woofer size: 165 mm (6.5")
• Tweeter type: dedicated small-dome tweeters for improved high-frequency response
• Crossover: component-style passive crossover network for frequency separation
• Mounting options: standard 6.5" woofer cutout compatibility and flexible tweeter mounting
• Recommended use: factory speaker replacement in automotive applications

How to use

Install the 165 mm woofers into the vehicle's existing 6.5" speaker locations using appropriate mounting hardware and fitment adapters if required. Mount the separate tweeters in locations that provide natural imaging, such as A-pillar, sail panels, or dash locations, and route wiring to the crossover. Connect each driver to the passive crossover according to the labeled terminals, ensuring correct polarity. If needed, adjust tweeter placement or angling for best on-axis response and minimal phase issues. Verify secure electrical connections and test the system at low volume before normal use.

Usage recommendations

For best results, use matched amplifier power within the speakers' handling range and avoid excessive clipping from the head unit. When installing, consider sound deadening at door panels to reduce panel vibration and improve bass definition. If uncertain about mounting locations or wiring, consult a professional car audio installer to ensure optimal placement and system longevity.