McLaren Audio M8-12D4 12" 800 Watt Dual 4 Ohm Car Audio Subwoofer/Sub M812D4 Brands/Turbostart/Chargers The 1" tweeter has a

The 1" tweeter has a silk dome for nice smooth high end response

Moving mass: 0

Center Frequency - 20Hz-80Hz

16 Volt AGM Race Battery

As a number of people can attest to

McLaren Audio M8-12D4 12" 800 Watt Dual 4 Ohm Car Audio Subwoofer/Sub M812D4 Brands/Turbostart/Chargers The 1" tweeter has aMcLaren Sound M8 12D4 12 Car Audio Subwoofer Hear the Difference, Feel the Difference Dual 4 Ohm Subwoofer Size: 12" 800W 1600W Description D2 D4 FS (Hz) 28. 29 30. 36 Re (ohm) 4 7 Sensitivity (dB) 85. 23 84. 8 Vas (L) 46. 36 42. 73 Qes 50 0. 63 Qms 3. 08 3. 11 Qts 0. 43 0. 53 MMs (grams) 248. 62 234. 27 Cms (mm N) 0. 127 0. 117 Bl 18. 77 22. 26 Sd (cm2) 511 511 Cutout Diameter (in) 11. 75 11. 75 Mounting Depth (in) 6. 6875 6. 6875