AudioControl PNW Series 4" 50 Watt (RMS) High-Fidelity Coaxial Speakers (Pair)Features Edge-enhanced steel frame for added structural strength. Black anodized voice coil former for superior heat dissipation. Linear double-roll surround for precision cone movement. Complex FEA-designed high-efficiency motor. Rigid poly mica-coated cone for optimized sound reproduction. Rear dampened hybrid silk dome tweeter for extended frequency response. Concentric point source design for a seamless transition from midrange to tweeter. Sonic diffuser and radiant collar for better off-axis frequency response. High-quality mounting hardware included. DescriptionLooking for an unmatched auditory experience? Look no further than AudioControl's PNW Series 4” High-Fidelity Coaxial Speakers! Immerse yourself in your music like never before by pairing AudioControl's legendary amplifiers with the latest PNW series. With an edge-enhanced steel frame, black anodized voice coil former, and a rigid poly mica-coated cone, the PNW line promises ultimate structural strength, superior heat dissipation, and precise cone movement. Plus, the tweeter's point source design ensures perfect driver alignment for exceptional sound quality.WHAT'S IN THE BOX (2) 4” High-Fidelity Coaxial Speakers User Guide Mounting Diagram SPECIFICATIONSAudio Crossover Type Butterworth DC Resistance (Re) 2.6 ohms Filter Type HP System Frequency (Fs) Response 75-20k Hz XO Frequency 5900 Hz Slope (Octave) -6 dB Midrange Voice Coil Diameter 25 mm Dimensions Overall Diameter (w/o Grille) 5.23 in/ 133 mm Cut Out Diameter 3.60 in/ 91.5 mm Mounting Depth 1.66 in/ 42.2 mm Height (w/o Grille) 0.16 in / 4.1 mm Height (w/ Grille) 0.64 in / 16.5 mm Motor Diameter (w/ Cover) 2.96 in / 75.4 mm Grille Overall Diameter 5.40 in / 137 mm