Amazon.com Phantom loudspeakers utilize high-quality poly injection cones with rubber surrounds for top performance. A custom tooled bridge houses midranges and tweeters for outstanding mid- and high-frequency response. The P55.4C is a 5-1/4-inch, four-way speaker with 300 watts peak power handling. P55.4C Specifications Power Handling, Peak: 300 Watts Impedance: 4 Ohms Frequency Response: 85Hz - 20kHz SPL (1 Watt/1 Meter): 93dB Cone Material: Electroplate Injection Voice Coil: 1-1/2-Inch Aluminum Tweeters: Two 1/2-Inch Piezos Midrange: 1-1/4-Inch Mylar Cone Mounting Depth: 2-1/16 Inches What's in the Box Boss P55.4C 5-1/4" 4-Way Speaker Product Description For maximum strength in speaker construction, nothing compares to a die-cast aluminum frame. The Electroplate Injection Cones (EIC) coupled with our rigid die-cast construction offer you the best sound quality, linear travel, and constructive durability in the industry today. The PHANTOM 4-way speaker systems are designed to be the very best. Dimensions: 6 x 6 x 2.4 inches Impedance: 4 ohms Mounting Depth: 2.1 inches, Mounting Hole: 4.7 inches Item Weight: 2.4 Lbs. (pair) Frequency Response: 85Hz to 20khz