Crossover Dimensions: 5" X 4.25" Inches​. features of Mid/woofer:. 8 Inch mid/bass speakers aluminum Bullet. Design: open-basket mid-bass. Sensitivity: 90dB. Frequency Response: 80hz-4khz. Impedance: 4 ohms. Reinforced black pulp cone. Linear progressive polyester-cotton composite spider. Aluminum Bullet phase plug high SPL design. High tinsel expanded steel basket. Cloth surrounds reproduces very clean sound. Zinc-plated t-yoke/washers. Super slim design facilitates door installations. 1.5” high temperature CCAW voice coil. 13oz. Magnet Y35. Shallow mounting depth. Top-mount depth: 2.32" Inches. Cutout diameter: 7.2" Inches. Overall diameter: 8.22” inches. Mounting hole diameter: 8 holes- 0.196" X 0.315" Inches​. TS parameters of Mid/woofer:. FS: 79.5Hz. Re: 3.6 Ohm. Qes: 1.542. Qts: 1.105. Qms: 3.894. Vas: 16.766K. Cms: 208.815. Bl: 4.729. Mms: 19.158G. Exm: 0.567​. features of tweeter:. 2” titanium compression horn tweeter. 1” high temperature die cast Kapton voice coil. Extremely loud and clear highs with an amazing frequency response that can even play some midst Ferro fluid enhanced voice coil cooling. Shallow mounting depth. 10oz. Magnet. Includes mounting hardware. Impedance: 4 Ohm. Cutout diameter: 2.8” inches. Mounting depth: 1.66” inches. Frequency response: 2 kHz - 20 kHz. Sensitivity: 96dB @ 1W/ 1M. Ts parameters of tweeter:. fo: 2.041 kHz. Re: 3.6 Ohm. Qes: 11.995. Qts: 2.74. Qms: 3.551. Krm: 11.224U Ohm. Erm: 1.034. Kxm: 1.531MH. Exm: 0.592