T-yoke is copper covered Due to the features above the bass is more tight and the mid range have higher resolution The parameters are fine tuned to play perfect in a car door Powerful magnet system Mid Range Cone is made of black coated fiberglass Crossovers with selectable tweeter level Grilles are included This is the replacement for the R6A Specifications: Woofer size: 16.5 cm (6.5") Tweeter: T25, 25 mm (1") silk dome tweeter Power handling capacity: 100 W RMS / 200 W max Impedance: 4 ohm Frequency range: 30 - 20 000 Hz Sensitivity: 90 dB (1W/1m) Crossover: Filter box with 6/12 dB slope (LP/HP) Crossover point (Hz): 5000 Hz Size of filter box: 145 mm x 85 mm x 45 mm (5.71" x 3.35" x 1.77") Outer diameter of woofer: 165 mm (6.5") Magnet size: 100 mm (3.94") Mounting depth: 78 mm (3.07") Mounting hole: 140 mm (5.5")