Proficient 2-Way Crosscover stereo speaker in black color is made of ABS molded enclosure for reliable performance. It measures 9-3/16 Inch x 6-1/2 Inch x 6-3/8 Inch. It includes a 5-1/4 Inch dual voice coil woofer made of polypropylene for durability and has a 1 Inch pivoting supernil soft dome tweeters. Speaker has a effective sensitivity of 88 dB and has a authentic frequency response of 45 Hz - 20 kHz. It has an impedance of 8 Ohm with a power rating of 125 Watts. It encloses a rust and waterproof swivel mounting bracket.