KENWOOD KFC-M604P 6" 3-way Component Speakers

What's the meaning of the A in the M series speakers? These speakers are equipped with a "5 degree slanted" mid-range speaker and a tweeter which we call it as "Angled Direct Sound" (so we put "A" in the model name) to direct mid-high range frequencies towards passengers ears and deliver clearer, more directional sound with less loss. Peak Input Power 270W Rated Input Power 60W (CEA Spec.) Woofer Features 160mm Injection P.P. cone with Square-Array Pattern Diaphragm Tweeter Features 25mm Soft Dome Tweeter Crossover Network Features In-Line Crossover Network Specifications Sensitivity: 88dB at 1m Frequency Response: 65-22k Hz Impedance: 4 ohms Size (WHD): 157.7mm x 157.7mm x 55.5mm (w/o Grille) Mounting Depth: 45.5mm Gross Weight: 2,000g Magnet Weight: 220g