6-1/2″ gto series 2-way component system power handling: peak: 540 watts per pair / 270 watts each rms: 180 watts per pair / 90 watts each recommended power: 5 – 200 watts rms each carbon-injected cone material patented plus one woofer-cone technology increased output with no extra power three-ohm voice coils allow compensation for added resistance by thin factory speaker wiring butyl rubber speaker surround edge-driven, fabric soft dome tweeter adjustable 0 or +3db tweeter level attenuation high-temperature voice coil vented magnet motor structure cools the voice coil fiberglass-reinforced plastic (frp) basket external 12db/octave crossover filters remove harmful frequencies enclosed magnet boot cover protective speaker grilles are included 3 ohms impedance frequency response: 67-21,000 hz top-mount depth: 2-1/16″ sensitivity: 92db