Pioneer equipped the TS-A1685R 6-1/2 Inch speakers with multilayer mica-matrix woofers that stay rigid when the volume's turned up, keeping distortion to a minimum so your bass sounds clean. Each woofer gets paired up with a midrange speaker, a tweeter, and a super tweeter to add warmth and clarity to your driving soundtrack. These speakers will sound great running off your factory stereo, but they'll really shine when driven by an aftermarket receiver or an external amp. don't drive another day listening to tired-sounding tunes, when you can enjoy Pioneer sound quality with these speakers in your vehicle SPECIFICATIONS: 6-1/2 Inch 4-way car speakers (pair) Multilayer mica-matrix woofer with elastic polymer surround 3/4 Inch lightweight diaphragm dome midrange 3/8 Inch PET dome tweeter and 3/8 Inch PET dome super tweeter Power range: 5-60 Watts RMS (350 Watts peak power) Frequency response: 34-30,000 Hz Sensitivity: 91 dB Top-mount depth: 2-3/16 Inch Grilles included .